CCMS In sap PI

8/13/2019 CCMS In sap PI

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SAP Buffers

Purpose

Each SAP instance (application server) has its own buffers. These buffers are also known as client caches be

they are implemented on the client, that is, the application server. SAP buffers occupy memory areas that are the work process, and in individual shared memory sements that can be accessed by all work processes. Thmemory areas are e!ecuted for the application server.

Some of the shared memory sements in an SAP System are rouped into one shared memosement known as a pool. This is done to meet the operatin system limits on the number of smemory allocations per process. "n most operatin systems, you can allocate as many sharedmemory sements as re#uired. The limits depend on the kernel confiuration. The A"$ operatsystem, for e!ample, allows %& shared memory sements per process.

SAP buffers store fre#uently'used data, and make this data available to the local application server instance. Thelps to reduce the number of database accesses, the load on the database server (it does not need to be accrepeatedly to obtain the same information), and network traffic. As a result, system performance is considerabimproved.

The data that is buffered includes AAP prorams and screens, AAP ictionary data, and company'specificTypically these remain unchaned durin system operation.

*ou can chane, ortune, the si+es of buffers to optimi+e performance for a particular hardware confiuration. are several ways to tune buffers. As there are many constraints to consider when chane the buffer si+e, sevedifficulties may arise.

*ou can use table bufferin to fine'tune applications, that is, some or all of the contents of infre#uently chanecan be held in local buffers.

SAP Buffers

Program Buffer This buffer occupies a whole shared memory sement.

Generic Buffer

Screen BufferThese buffers are held in a shared memory pool. All work processes caaccess this pool.

Roll Area ocal work process buffers. -nly one work process can access these ba time.
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Monitoring in the CCMS

Purpose

The CCMS provides a range of monitors for monitoring the SAP environments and its components. T

monitors are indispensable for understanding and evaluating the behavior of the SAP processing

environment. In the case of poor performance values, the monitors provide you with the informationreuired to fine tune your SAP system and therefore to ensure that your SAP installation is runningefficiently.

Implementation Considerations

!or central monitoring, that is, for the monitoring of a system landscape from one system, you must p

various configuration steps yourself. These are outlined in Configuring the Monitoring Architectur

Features

The CCMS analysis monitors provide functions for

heckin the system status and the operatin modes

etectin and correctin potential problems as #uickly as possible An early dianosis of potential problems, such as resource problems in a host or database system, whi

could affect the SAP system

The analysis and fine tunin of the SAP system and its environment (host and database system) to opt

the throuhput of the SAP system

The previous monitorin and alert system in the /S was replaced by the monitorin archite

The new monitorin architecture provides all of the functions that previously e!isted as well as nemore reliable alerts and more comple!, more powerful functions.

Use

"ou can either use the following monitors independently or e#ecute them as analysis methodsin thmonitor$

0lobal 1ork Process -verview

1orkload /onitor

0lobal 1orkload /onitor

-peratin System /onitor

-peratin System ollector

SAP uffer

atabase /onitor

Global Wor Process !"er"ie#

Purpose

*ou can #uickly investiate the potential cause of a system performance problem by checkin the work proces*ou can use the lobal work process overview to2
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/onitor the work process load on all active instances across the s$stem

"dentify locks in the database (lock waits).

3sin the Global Work Process Overview screen, you can see at a lance2

The status of each application server

The reason why it is not runnin

1hether it has been restarted

The P3 and re#uest run time

The user who has loed on and the client that they loed on to

The report that is runnin

See also%

Selectin 1ork Processes

isplayin etailed 1ork Process "nformation

Selecting Wor Processes

Procedure

all /S ontrol4monitorin 1ork process overview. Alternatively, call Transaction S/55.

hoose the Select process pushbutton.

Select the work processes and statuses that you want to display more information on. *ou can also dinformation on specific prorams and users.

&$pe

hoose the work process type.

Status

*ou can select the work process statuses you are interested in.

Runtime selection

3se this option to select lon'runnin work processes.

Application selection

3se this option to select re#uests for specific 647 transactions.

Reporting
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3se this option to select specific AAP48 prorams.

User selection

*ou can investiate the potential specific causes of a problem. "f you suspect that a particular user is work processes, enter the name of the proram or user, then choose Continueto filter the information

'ispla$ing 'etailed Wor Process Information

Procedure

hoose CCMS Control/monitoringWork process overview.Alternatively, call Transaction S/55

Position the cursor on the instance and choose Choose. *ou can terminate the proram that is curren

runnin and debu it.

9or backround processes, additional information is available for the backround :ob that is curunnin. *ou can only display this information, if you are loed onto the instance where the :runnin, or if you choose Settings and deselect Display only abbreviate in!ormation" avoi #any case, the :ob must still be runnin.

Worload Monitor

Purpose

The workload monitor (transaction ST&7;) is intended for use by Early1atch and 0oinive teams. The work

monitor was reworked as part of the En:oySAP initiative, so that the 1orkload -verviewis now simpler andintuitive.

*ou use the workload monitor to analy+e statistical data from the SAP kernel. 1hen analy+in the performanc

system, you should normally start by analy+in the workload overview.9or e!ample, you can display the toall instances and the compare the performances of individual instances over specific periods of time. *ou can

determine the source of possible performance problems usin the lare number of analysis viewsand thedetermined data.

*ou can use the workload monitor to display the2

;umber of confiured instances for each SAP 647 System

;umber of users workin on the different instances

istribution of response times

istribution of workload by transaction steps, transactions, packaes, subapplications, and application

Transactions with the hihest response time and database time

/emory usae for each transaction or each user per dialo step
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1orkload throuh 69, listed by transactions, function modules and destinations

;umber and volume of spool re#uests

Statistics about response time distributeion, with or without the 03" time

-ptional2 Table accesses

1orkload and transactions used listed by users, payroll number, and client

1orkload enerated by re#uests from e!ternal systems

9or all of this data2

*ou can display the data for a particular instance (not only the one to which your loed on) or optiona

totalled for all instances.

ependin on your user mode, you can choose the time period for which you want to display the data

between day, week and month (or determine the lenth of time yourself usin the ast /inutes< oafunction).

9or most analysis views, you can display all or only certain task types.

Integration

The workload monitor completely replaces the old ST&7 transaction.

Features

The workload monitor has an interface that is divided into two parts. 3se the tree structures on the left of the smake the followin settins2

Select the user mode Select the time period for which you want to display the workload

Select various functions and analysis views (which data you want to display).

The system then displays the result on the riht of the screen in a standardi+ed A= 0rid ontrol. 1ith it, you

Ad:ust the ayout of the ata -utput 9ind the information you want usin sort and filter functions

Save user'specific views

isplay statistics raphically

!perating the Worload Monitor

Use

The %or&load Monitoris a one'screen transaction that has as few additional menus as possible. This

operation significantly easier and more intuitive.

Integration

Transaction ST()* of the %or&load Monitor has replaced the old transaction ST().
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Features

Acti"ities

The individual screen elements of the wor&load monitor have the following meanings$

User Mode

After starting the %or&load Monitor, choose a user mode. This gives you access to precisely the funcand periods that are appropriate for the selected role.

Functions

In the $unctionssubscreen, choose an icon by double'clic&ing it$

Function Meaning

1orkload ependin on the user mode, you can define theinstance and the period that you want to analy+e here.

etailed Analysis These functions read the workload directly from thestatistics files of the individual instances.

usiness TransactionAnalysis

"ou can perform a very precise analysis of

individual transactions here, down to the level of

individual steps.
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ast /inutes< oad *ou can use this function to analy+e the workload datathat has not yet been written to the performancedatabase /-;".

oad >istory and istribution

oad >istory

"nstance omparison

3sers per "nstance

1ith these functions, you cannot display the workloadfor a particular instance and a particular period (as in theother workload monitor functions), but rather comparethe workload of different instances or periods.

isplay the most important data toether thereforeallows a direct comparison of the instances.

1 1orkload Statistics of the 1 1orkload /onitor (only if there is ausiness 1arehouse in the system)

ollector ? Performance atabase Amon other thins, you can use this function to definewhich values the statistics collector collects, how often,and how lon they are to be retained in the performancedatabase in what time resolution.

Analysis Views

An analysis view displays a particular aspect of the wor&load. In the Analysis +iewsubscreen, choosview that you want to analye by double'clic&ing it.

-nly those analysis viewsare displayed2

That are active in the selected user mode

!or which data e#ists

Output Area

The output area uses an A-+ rid Control, with which you can greatly tailor the selected view to yo

reuirements. !or most load parameters, the wor&load monitor displays more data fields than are refor your analysis. "ou therefore have a considerable amount of help available in the output area to fin

information relevant for you$

The data of most analysis views is rouped in the results area by tab paes for different topic areas.

To obtain an overview of which data fields e!ist for an analysis view, choose the%ll Datatab pae.

3sin the standard functions of the A= 0rid ontrol, you can

Show and hide columns

Sort rows by the contents of a column

Set and delete filters

Perform summations

/#port tables as a file type of your choice 0isplay tables as graphics

Save sort orders, filters, and selected columns as your layout

Editing Views

Choose one of the following buttons in the &it 'iewsscreen area$

Button Meaning
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Save 'iew Saves the current view as your initial screen for the workloadmonitor (see alsoSavin 3ser'Specific =iews)

Previous 'iewor (e)t 'iew /oves one view forward or back in the view history

$ull Screen* Show/+ie ,ree Shows or hides the $unctionsand%nalysis 'iewssubscreenson the left of the screen

Global Worload Monitor

Purpose

The lobal %or&load Monitor 1transaction ST()2 display statistical records for entire landscapes a

therefore allows you to analye statistics data for both SAP 34) and non'SAP 34) systems. "ou can u

data to analye the wor&load of the monitored components in great detail. The monitor is organied aone'screen transaction so that its operation is very intuitive, and so that you can uery all desired data

only a few mouse clic&s.

%hile statistics records for an SAP 34) system can only trace actions that are processed by SAP 34)

components, you can use 0istributed Statistics 3ecords 10S3s2 to trace actions that are processed acr

non'SAP 34) components 56// /ngine, ITS, and 7C. This also wor&s across component boundariesComponents that write statistics records send data from the statistics record with their communication

other components 1their 8passport92, meaning that the originator of an action or a data flow of a businprocess can be traced even beyond component boundaries.

The 0S3s are first stored locally on the relevant component and are transferred to a monitoring syste

hourly by CCMS agents, where the aggregated statistical data is stored in a performance database regularly reorganied.

Integration The operation of the lobal workload monitor is larely similar to the operation of the SAP 647 workload

monitor(transaction ST&7;), which displays statistical data for the local AAP system. The 0lobal 1or

/onitor actually uses functions of the SAP 647 1orkload /onitor when you analy+e the workload of SASystems.

The 0lobal 1orkload /onitor displays statistical data areated by the collector. *ou can display raw

statistical data (individual records) from SAP 647 and non'SAP 647 Systems from comple! system landsusin thefunctional trace(transaction STATT6AE). The functional trace offers a finer resolution. *ou the functional trace to trace actions that belon to a business process across system boundaries.

The differences between the functional trace and the lobal %or&load Monitor are e#plained in t

section 0ifference 7etween the !unctional Trace and the lobal %or&load Monitor.

Features

"ou can perform the following analyses, among others, in the lobal %or&load Monitor$

>ow is the workload distributed amon the individual service types@ (9or more information about servic

see isplayin the 1orkload -verview.)

1hat is the workload of individual actions@

>ow is the workload distributed over the individual hours of the day@

1hich action steps have the lonest response and wait time@

1hat workload data is created when callin e!ternal components@

1hat is the workload of individual users and which actions has a user performed@

1hat workload is created in a component on the basis of actions of e!ternal components@
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1hat is the response time distribution for individual service types (re#uired, for e!ample, for Service e

Areements)@

1hat is the availability of the statistical data for the individual components@

The following applies to all of these analyses$

*ou can choose the period for which you want to display data between day, week, and month, or speci

ast /inutes< oadas you re#uire. *ou can display data for any component or optionally totaled for all components of a type.

See also:

:perating the lobal %or&load Monitor

Configuring4Self'Monitoring of the lobal %or&load Monitor%or&load Collector Monitor

!perating S$stem Monitor

Purpose

An SAP instance runs within an operatin system. The operatin system provides the instance with the followresources2

=irtual memory

Physical memory

P3

9ile system manaement

Physical disk

;etwork

ottlenecks in these areas can sinificantly affect the performance of the SAP system. *ou can monitor theseresources usin the /S operatin system monitor.

The operatin system monitor helps you locate the cause of a performance problem. "f the source of the problthe operatin system, you can analy+e it further and resolve it usin e!ternal tools or other e!ternal means.

Performance indicators are2

Averae load of and utili+ation of the P3

/emory utili+ation

Pain in and out of data to and from the memory (replaced by pool data in the -S48&& operatin sys

monitor) isk utili+ation information

A; activity

-peratin system confiuration parameters

See Also%

allin the -peratin System /onitor
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-peratin System /onitor ata2 P3

-peratin System /onitor ata2 /emory /anaement

-peratin System /onitor ata2 9ile System and A;

Calling the !perating S$stem Monitor

Use

*ou can use the operatin system monitor to monitor the system resources that the operatin system providescollector SAP-S- collects these resources. *ou can call the monitor for the server on which you are curreloed on, or for another service.

*ou can also monitor operatin system data usin the /S monitor Operating Syst(transaction 6B&). >owever, the data displayed there is, in principle, only complete imonitored servers belon to SAP systems. This restriction does not apply to the operasystem monitor.

Prere(uisites

SAP-S- must be runnin so that the data is available.

Procedure

To call the individual functions shown in the table, choose CCMS Control/Monitoring Per!ormance Menu

Operating System.

Function Menu Path &ransaction

all operatin systemmonitor for the localserver

-ocal %ctivity -S&5

all operatin systemmonitor for anotherserver

#emote %ctivity" then select thedesired server on the S%POSCO-Destination screen

-S&C" then select the desiredserver on the S%POSCO-Destination screen

"n both cases, the system displays performance indicators for the operatin system of the desired server.
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9or information specific to the -S48&& operatin system monitor, see Pool ata in the-S48&& -peratin System.

To display additional information about the individual areas, choose the correspondin row.

ata for the last B8 hours is displayed for the P3, the memory, and the swap space. 9or the hard disk and th

the system displays a list of the current data for each hard disk and A; interface. "f problems occur, the systedisplays appropriate messaes.

To update the data displayed on the screen, choose #e!resh. As SAP-S- collectsby default in %& second intervals, you do not always obtain new data by choosin #e!

Possible )rror Messages

Share memory not available

SAP-S- has not created a shared memory sement.

This is usually due to the fact that the SAP-S- proramhas not been started.

Collector not running SAP-S- was started and created a shared memorysement, but was later terminated.

9or more information about this topic, see Error Analysis2 -peratin System ollector.

!perating S$stem Monitor 'ata% CPU

'efinition

The followin data about P3 usae is displayed for every P3, broken down as percentaes by2

3sers

System

Times in which the P3 had no task to perform or was waitin for an input4output (ile)

/any factors could lead to an e!cessively hih P3 utili+ation, and you should therefore perform a detailed an"f the problem was caused by too many active processes in the host system, you could, for e!ample, transfer intensive prorams to times when there is a lower system workload, or to other host systems. *ou could also the number of P3s or uprade the P3(s).

1hen calculatin the hourly value for the last B8 hours, these values are averaed ovP3s of a host.

!ther *alues Collected
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;umber of P3s

"nterrupts per second4hour

System calls per second4hour

onte!t switches per second4hour

Averae number of waitin processes for the last minute, last five minutes and the last %D minutes

This is the number of processes for each P3 that are in a wait #ueue before they are assinfree P3. As lon as the averae remains at one process for each available P3, the P3resources are sufficient. As of an averae of around three processes for each available P3,a bottleneck at the P3 resources.

o "n connection with a hih P3 usae, a hih value here can indicate that too many processes

active on the server.o "n connection with a low P3 usae, a hih value here can indicate that the main memory is t

small. The processes are then waitin due to e!cessive pain.

%. etail data for the processes that cause the larest P3 load2

%. Process "B. -wner of the process7. ommand that started the process8. Absolute and percentae P3 usae by the processD. 6esident process si+e in kilobytes5. Priority of the process

Use

The system displays the specified data when you call the operatin system monitor.

The system displays the current detail data for the larest P3 users, if they choose Detail analysis menu

Current Data Snapshot ,op CP processesin the operatin system monitor (see also etail ata of the-peratin System /onitor).

heck the followin performance factors in particular2

'ispla$ Procedure

"s a P3 user constantly active@ heck whether the process is in an endless loop.

"s the averae load 7 (more than threeprocesses are waitin for the P3)@

heck whether all processes with hih P3 usae(memlog, r3trans, nwengine,brbackup...) arenecessary.

"s the usae of the P3 +ero percent@ heck the analysis for the previous hours.
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SAP03" should not be runnin on the application server.

*ou can also display SAP work processes with hih P3 usae with the SAP procesoverview. The SAP process overview displays the AAP proram that is usin the P

!perating S$stem Monitor 'ata% Memor$ Management

'efinition

The data that you can check in the operatin system monitor for memory manaement includes data for the swspace and pain as well as the physically available memory. The followin values are measured2

Physically available and free main memor$ in FilobyteG the minimum and ma!imum free main memor

also measured hourly.

As a rule of thumb, if P3 bottlenecks occur if there is less than %& / of free physicmemory for a small hardware confiuration. This value can vary dependin on operatsystem and system si+e.

Paging is the e!chane of data paes between the main memory of a host system and the overflow s

a pain file on the hard diskG pain occurs if the main memory is not lare enouh for the conte!ts orunnin processes SAP-S- measures the number of paes paed in and paed out per second w#uantities of memory paed in and paed out in kilobytes.

>ih pain rates indicate that the main memory is too small for the runnin processes. /eas

that you can take are to e!tend the main memory, to move processes to other host systems, adelay memory'intensive proram runs to times of lower system workload.

-n 1indows platforms (unlike 3;"$ platforms), the system performs pain out as aprecautionary measure even when space is not re#uired in the workin memory, meathat this value is irrelevant and you should only consider the pain in rate. 3nder 3;the other hand, PageOutis the critical value for evaluatin the pain.

S#ap Spaceis storae space on the hard disk to which data that is not re#uired is written from the m

memory, so that there is space in the main memory for the proram currently bein e!ecuted. SAP-S

measures the confiured and free swap space in kilobytes and the actual and ma!imum si+e of the swspace in kilobytes.

"n addition, the ma!imum and minimum si+es of the free swap space is measured hourly. Theimportant values are the free and the actual swap space.
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;ot all types of swap space are available on all operatin systems. 9or this reason, incases, the actual swap space si+e corresponds to the confiured and ma!imum swap

Use


"n the detail data, the system also displays the performance history for the last B8 hours and 7& days (see alsoata of the -peratin System /onitor).

To call the individual functions in the table, choose the Detail %nalysismenu in the operatin system monitor.

Function Menu Path

heck memory usae for the last B8 hours Goto Current Data Previous hours

Memory

heck the swap space usae for the last B8hours

Goto Current Data Previous hours

Swap

heck pain and swap space for theprevious days for one server

Goto Per!ormance Database Compare

recent ays

heck pain and swap space for theprevious days for various servers

Goto Per!ormance Database Compare all

servers

!perating S$stem Monitor 'ata% File S$stem and +A,

'efinition

The operatin system monitor displays the followin data for hard disks, A;, and file systems2

9or all ph$sical hard disson a host2

o evice name of the hard disk

o >ard disk usae H percentae of the time in which the hard disk is bein used

o Averae wait #ueue lenth of an input4output re#uest

o 1ait time in milliseconds durin which a re#uest waits in the wait #ueue

o Service time in milliseconds for an input4output

o Transferred kilobytes per second

o ;umber of disk operations per second
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9or all file s$stems on a host2

o ;ame of the file system

o apacity of the file system in meabytes

o 9ree storae space in the file system in meabytes

9or all +A, interfaceson a host2

o ;ame of the A; interface

o ata packets received per second

o ata packets sent per second

o Errors for received packets per second

o Errors for sent packets per second

o ollisions per second, in which two stations transport a packet at the same time on the same

channelG this leads to the destruction of both packets and means that they must be sent aain

Some values are not specified in some network interfacesG for e!ample, there may not be a value for collisionssecond in a token rin architecture. The values specified here do not describe the actual network traffic. They

describe the transfers performed with this interface. This means that the errors displayed here refer to the inteand not to the actual network sement.

Use


"n the detail data, the system also displays data for allhard disks and for all file systems of a server, and theperformance history of the last B8 hours and 7& days (see also etail ata of the -peratin System /onitor).


Function Menu Path

heck the current usae of the file systems Goto Current Data Snapshot

$ilesystem etail

heck the current usae of the hard disks Goto Current Data Snapshot Disk

etail

heck the current usae of the A; Goto Current Data Snapshot -%(

etail

heck the usae of the file systems for the lastB8 hours


$ilesystem etail
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heck the usae of the hard disks for the lastB8 hours


Disk etail

heck the usae of the A; for the last B8hours

Goto Current Data Previous hours -%( etail

heck the file system, hard disks, and A; forthe previous days for a server


recent ays

heck the file system, hard disks, and A; forthe previous days for various servers


all servers

See also%

-peratin System /onitor ata2 P3

-peratin System /onitor ata2 /emory /anaement

!perating S$stem Monitor

Purpose

An SAP instance runs within an operatin system. The operatin system provides the instance with the follow

resources2

=irtual memory

Physical memory

P3

9ile system manaement

Physical disk

;etwork

ottlenecks in these areas can sinificantly affect the performance of the SAP system. *ou can monitor theseresources usin the /S operatin system monitor.

The operatin system monitor helps you locate the cause of a performance problem. "f the source of the problthe operatin system, you can analy+e it further and resolve it usin e!ternal tools or other e!ternal means.

Performance indicators are2

Averae load of and utili+ation of the P3

/emory utili+ation

Pain in and out of data to and from the memory (replaced by pool data in the -S48&& operatin sys

monitor)
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isk utili+ation information

A; activity

-peratin system confiuration parameters

!perating S$stem Collector SAP!SC!+

'efinition

The operating system collector SAP:SC:- is a stand'alone program that runs in the operating systebac&ground. It runs independently of SAP instances e#actly once per monitored host. SAP:SC:- co

data about operating system resources, including$

3sae of virtual and physical memory

P3 utili+ation

3tili+ation of physical disks and file systems

6esource usae of runnin processes

SAP:SC:- ma&es the data available using a segment of the shared memory for various applications

all SAP instances on a host. A CCMS agentor a dialog wor& process reads the data from the sharememory. "ou can display the data in various monitoring architecture monitors or in the operating sys

monitor 1transactions :S(; and ST( servers were so scarce was necessary to customie the applications to these resources.

In many areas, SAP 34) is based on a logical, operating system'li&e level 1such as memory managem

managing the wor& processes2. SAP 34) could only manage these tas&s if it had access to reliableperformance values for the operating system, independent of the specific operating system. SAP:SC

performs this tas& with a small usage of resources such as CP= or memory.

Features

The program SAP:SC:- is delivered with every SAP system, but is not restricted to SAP systems.

special features of the program are$

*ou re#uire a special authori+ation to use SAP-S- (see "nstallin SAP-S- on a /icrosoft 1ind

>ostor "nstallin SAP-S- on a 3;"$ >ost).

SAP-S- runs e!actly once on each host.

SAP-S- runs independently of the SAP system.

7y default, SAP:SC:- collects the current data every ten seconds and records it, and records the ho

averages for the last 6? hours.

Another bac&ground @ob, SAP_COLLECTOR_FOR_PERFORMANCE, ta&es performance data for thehours from the shared memory and writes it to the M:*I performance database. "ou can compare thfor one or more hosts.

Supported Operating Systems

SAP:SC:- is delivered for the following operating system platforms$

/icrosoft 1indows

A"$

S3;4S-A6"S
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>P'3$

";3$

-S47I&

-S48&&

S;"

AP>A-S9

Installation and Configuration of SAP!SC!+

Purpose

The program SAP:SC:- is part of the standard delivery for all SAP systems is always installed wit

system. It is possible, however, that you will have to install SAP:SC:- yourself. Possible reasons f

are$

*ou want to monitor operatin system data for hosts on which no SAP instance is runnin or that are no

of an SAP system, but which are important for the environment of your SAP system. "n this case, ensur

/S aentis runnin on the host.

*ou want to correct an incorrect installation.

*ou want to install a newer version of SAP-S-.

Always use the current version of SAP-S-. *ou can find the proram as described underownloadin SAP-S-.

Process Flo#

SAP:SC:- is dependent on the operating system ' the installation therefore varies depending on the

operating system of the host to be monitored. !ollow the appropriate procedure$

"nstallin SAP-S- on a /icrosoft 1indows >ost&

"nstallin SAP-S- on a 3;"$ >ost

9or more information about the installation of SAP-S-, see SAP ;ote %IBBC.

y default, SAP-S- automatically has a valid workin directory after the installation. 9or information

chanin this directory, seeSAP-S-2 1orkin irectory and Profile Parameters.

"f you want to monitor particular processes with SAP-S-, see /onitorin Selected Processes with

SAP-S-.

Control the !perating S$stem Collector SAP!SC!+

Purpose

After you have installed and started the operatin system collector SAP-S-, it automatically beins to colloperatin system data for its local host and to store this data in the shared memory.

SAP-S- provides various settins that you can use to improve its performance, to customi+e the #uantity collected data to your re#uirements, and to help you find the causes of errors.
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Process Flo#

The followin sections contain the most important information about controllin SAP-S-

Control SAP!SC!+ from the SAP S$stem

Use

*ou can control and monitor SAP-S- within the SAP system usin the operatin system monitor (transactST&5 and -S&C). *ou can use the followin commands to do this2

Start and stop SAP-S- (to start and stop SAP-S- on a remote host, see ontrol SAP-S-

6emote >osts).

isplay e!_coll, the lo file of SAP-S- isplay the current status of SAP-S-

Set and delete the detailed selection (see SAP-S- o 9iles).

Control SAP!SC!+ from the !perating S$stem

Use

*ou can also control SAP-S- directly from the operatin system input prompt.

SAP-S- must be runnin for you to be able to use the followin commands. Startoperatin system collector with the command saposcol #l.

Features

ontrol SAP-S- from the operatin system input prompt usin the command saposcol $Option%. Thefollowin options are possible2

!ption 'escription

& Startsthe dialo mode of the operatin system collector SAP-S-

&k Stops the current collector

&r Stops the current collector and displays the results
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&' isplays the possible SAP-S- options

&( 9orces the collector to start, even if the collector is already collectin data

&s isplays the status of the collector

&i $Number% Sets a new interval for the collection of data in the normal mode (every$Number%secondsG the default value is %& seconds)

&! isplays the version of the collector

&u $Number% Sets the interval in seconds for the switch to idle status (the default value is 7&&seconds)G if the data in shared memory is not read for the specified lenth of time,SAP-S- switches from normal mode to idle mode.

&e $Number% Sets the interval in seconds for the collection of data in idle status (the default value is5& seconds)

&c eletes the data in shared memory

&p 1rites the shared memory to the file coll)put

&g 1rites the contents of the file coll)putto the shared memory

&t Sets the trace level for debuin

&*tl Activates cyclical trace (see SAP-S- o 9iles)

&n Sets the normal trace level

&o isplays all collected data from the shared memory

&m isplays all current data from the shared memory
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'ialog Mode of the !perating S$stem CollectorSAP!SC!+

Use

SAP-S- has a dialo interface, Collector>, that you can start from the operatin system input prompt w

command saposcol #. *ou can enter various dialo commands here. 3se the command 'elpto obtain a the possible commands.

Features

'ispla$ing the 'ata in Shared Memor$ Collected b$ SAP!SC!+

*ou can use the dialo mode to call up the data that SAP-S- wrote to the shared memory. The most impocommand is ump, which is used to display various data collected by SAP-S- and stored in the shared mdependin on parameters and options.

ump $Parameters% $option%

The followin parameters are possible2

Parameter 'escription

cpu P3

memory /emory

top arest P3 user

disk >ard disk

filesystem 9ile system

lan A;

proc /onitorin of selected processes

The followin options are possible2

!ption 'escription

sinle urrent value of a sinle selected parameter

all urrent value of all parameters available in shared memory

sum >ourly averaes for the last B8 hours of all parameters available in
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shared memory

;ote that not all of the parameters can be combined with all of the options.

There are also the followin uses of the umpcommand2

Command 'escription

dump confidefined

onfiured operatin system parameters

dump confi used urrently used operatin system parameters

dump hour isplays a list of the last B8 hoursG each of the B8 entries has theformat 'our+ $,&-3% o( a. $Number%, where$Number%specifies whether SAP-S- has consistent data for that hour2,+;o data available/+current hour-+inconsistent data

$ate 01111MMTT2%2 ata available

To display the memory'related operatin system data in the shared memory, enter thefollowin command at the Collector>command line2

ump memor. all

The followin information is displayed2

Collector>ump memor. allPages paged in / sec 1

Pages paged out / sec 0

KB paged in / sec 4

KB paged out / sec 0

freemem [KB] 13312

phsmem [KB] !""3!

s#ap configured [KB] $!34%s#ap total si&e [KB] $!34%

s#ap free inside [KB] $2""!

Controlling SAP!SC!+ in 'ialog Mode

*ou can control SAP-S- in dialo mode usin the followin commands at the Collector>input prompt2


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Command 'escription

detailson Sets the details fla

detailsoff ancels the details fla

interval Jn hanes the collection interval to$n%seconds (efault K %&)

leave eletes the shared memory

kill Stops the backround process

launch Starts a new collector

force 9orces a new collector to start (only in emerencies)

status

stat

isplays the status of the SAP-S- process that is collectin data

in the backround

The chaned values are written to shared memory. SAP-S- reads these values directly before collectin dThe chanes then take effect.

"f you chane the collection interval, the collector switches to the new interval only afte!piration of the old interval.

)nding 'ialog Mode

To leave the dialo mode of SAP-S-, use the command uitor the command e4it

Starting SAP!SC!+

Use

*ou only need to start SAP-S- yourself the first time that it is started on a host (see "nstallation and onfiof SAP-S-). Thereafter, SAP-S- is automatically stopped and started when the host is shut down andstartedG this applies irrespective of whether SAP components are runnin on the correspondin host. A manuaand restart is only necessary in the followin conditions2

*ou want to install a newer version of SAP-S-.

*ou want to stop SAP-S- that is collectin incorrect data or to correct an incorrect installation.

Procedure

The command to start SAP-S- varies dependin on the operatin system2

3nder 3;"$, you start SAP-S- with the command saposcol(or saposcol &l).
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3nder 1indows ;T, you start SAP-S- by startin the correspondin service by choosin Start

Settings Control Panel Services(see SAP ;ote &875%L5).

*ou can also start SAP-S- in the operatin system monitor.

;ormally, SAP-S- is called without additional parameters or profiles. saposcol corresponds to this call, where &lstands for start (see ontrollin SAP-S- from -peratin System).

The followin occurs when the start command is e!ecuted2

"f the call finds a SAP-S- sement in the shared memory, it takes over its process " (P") and th

stored data of a SAP-S- that may already be runnin.

"f no other SAP-S- is collectin data, the P" is &, and SAP-S- uses the e!istin shared mem

sement when startin. SAP-S- also starts if no shared memory is available.

The new SAP-S- does not start if it detects that another SAP-S- is already collectin data.

After it has been started, SAP-S- performs an initiali+ation durin which it reserves its re#uired spshared memory. The proram calculates the si+e of this space from the number of available hard diskP3s, file systems, and so on. SAP-S- writes the contents of the file coll)put(if it e!ists) to itsmemory sement.

The process continues runnin in the backround, and the oriinal proram ends.

Stopping SAP!SC!+

Use

The command to stop SAP-S- varies dependin on the operatin system2

3nder 3;"$, you stop SAP-S- with the command saposcol &k.

3nder 1indows ;T, you stop SAP-S- by stoppin the correspondin service (by choosin Start

Settings Control Panel Services).

*ou can also stop SAP-S- in the operatin system monitor.

o not stop SAP-S- usin other operatin system commands, as the data in the memory could become corrupted. Also, in this case you cannot start a new SAP-Sreceive an error messae that a SAP-S- is already runnin.

Procedure

The command to stop SAP-S- first starts a new SAP-S- that stops the active SAP-S- after a secThe followin occurs2

The new SAP-S- connects to the shared memory.

3sin the shared memory, it determines the process " (P") of the SAP-S- that is collectin data
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"f the new SAP-S- finds a valid P", it sets a fla in shared memory. 1hen the old SAP-S- fi

fla, it resets the fla and deletes the P" from shared memory. "f this is not complete within B& seconnew SAP-S- stops the old SAP-S-.

>ow lon a shared memory sement e!ists depends on the operatin system. -n a 3;"$ operatin sit is stored until SAP-S- deletes it. -n 1indows ;T, the shared memory is deleted by the operatinsystem if no process is connected with it.

The old SAP-S- writes the data in shared memory to the file coll)putin the SAP-S- workidirectory. The proram then ends.

1hen the host is restarted, the file coll)putis imported so that the combined data is availathe shared memory. "f, for e!ample, SAP-S- is stopped at %B2&7 and is restarted at %828Idata until %B2&& is still available for the SAP system. To avoid confusion, invalid data for the tim%B2&& until %82&& is not displayed in the overview of the last hours in the operatin system mo

elete the file coll)put, if you stop SAP-S- in the conte!t of error analysis, as proram imports the (possibly erroneous) measured values from the file to the sharedmemory sement if it is restarted.

Reducing the CPU +oad Caused b$ SAP!SC!+

Use

SAP-S- can use a hih proportion of operatin system resources, as it periodically collects data from theoperatin system. 1hich data re#uires the most resources durin collection depends on the operatin systemhave the followin options to minimi+e the P3 usae of SAP-S-2

Procedure

'elete the 'etail Selection

*ou can control the collection of data by SAP-S- by havin certain data, the collection of has a particularly hih influence on the performance, collected less fre#uently. 1hich data bethis roup depends on the operatin system of the monitored host2

y default, detail selection is set (Details re0uirepushbutton in the operatin system monitorcommand etailsonin dialo mode). To remove detail selection, choose Details O!!in theoperatin system monitor, or enter the command etailso((in the dialo mode. This settinapplies universally.

Use the Idle Modeof SAP!SC!+

"f the data is not read from the shared memory durin a period of five minutes, SAP-S- swfrom normal mode to idle mode. "n this mode, the collector collects data every minute instead
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every ten seconds. This is sufficient for a well'founded hourly averae value. "f a process readfrom the shared memory durin idle mode, SAP-S- switches back to normal mode.


'efinition


3sers

System





;umber of P3s









etail data for the processes that cause the larest P3 load2

o Process "

o -wner of the process

o ommand that started the process

o Absolute and percentae P3 usae by the process

o 6esident process si+e in kilobytes

o Priority of the process
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Use



Current Data Snapshot ,op CP processesin the operatin system monitor (see also etail ata of the

-peratin System /onitor).


'ispla$ Procedure





SAP03" should not be runnin on the application server.

*ou can also display SAP work processes with hih P3 usae with the SAP procesoverview. The SAP process overview displays the AAP proram that is usin the P


'efinition

The data that you can check in the operatin system monitor for memory manaement includes data for the swspace and pain as well as the physically available memory. The followin values are measured2



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a pain file on the hard diskG pain occurs if the main memory is not lare enouh for the conte!ts orunnin processes SAP-S- measures the number of paes paed in and paed out per second w#uantities of memory paed in and paed out in kilobytes.

>ih pain rates indicate that the main memory is too small for the runnin processes. /eas

that you can take are to e!tend the main memory, to move processes to other host systems, adelay memory'intensive proram runs to times of lower system workload.

-n 1indows platforms (unlike 3;"$ platforms), the system performs pain out as aprecautionary measure even when space is not re#uired in the workin memory, meathat this value is irrelevant and you should only consider the pain in rate. 3nder 3;the other hand, PageOutis the critical value for evaluatin the pain.


memory, so that there is space in the main memory for the proram currently bein e!ecuted. SAP-S

measures the confiured and free swap space in kilobytes and the actual and ma!imum si+e of the swspace in kilobytes.



Use




Function Menu Path


Memory



Swap


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recent ays


Goto Per!ormance Database Compare allservers


'efinition


9or all ph$sical hard disson a host2

o evice name of the hard disk

o >ard disk usae H percentae of the time in which the hard disk is bein used

o Averae wait #ueue lenth of an input4output re#uest

o 1ait time in milliseconds durin which a re#uest waits in the wait #ueue

o Service time in milliseconds for an input4output

o Transferred kilobytes per second

o ;umber of disk operations per second


o ;ame of the file system

o apacity of the file system in meabyteso 9ree storae space in the file system in meabytes


o ;ame of the A; interface

o ata packets received per second

o ata packets sent per second

o Errors for received packets per second

o Errors for sent packets per second

o ollisions per second, in which two stations transport a packet at the same time on the same

channelG this leads to the destruction of both packets and means that they must be sent aain

Some values are not specified in some network interfacesG for e!ample, there may not be a value for collisionssecond in a token rin architecture. The values specified here do not describe the actual network traffic. Theydescribe the transfers performed with this interface. This means that the errors displayed here refer to the inteand not to the actual network sement.

Use

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Function Menu Path


$ilesystem etail


etail

heck the current usae of the A; Goto Current Data Snapshot -%(etail



$ilesystem etail



Disk etail



-%( etail



recent ays



all servers

SAP!SC!+% )rror Anal$sis

Purpose

"f incorrect, incomplete, or no values at all about the operatin system are displayed in the operatin system m

or in the Alert /onitorof an SAP systems, we recommend the followin procedure2
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Process Flo#

heck whether SAP-S- is runnin on the relevant host. *ou can perform this check at the operat

system command line by enterin the command saposcol&sin the SAP-S- directory (see onSAP-S- from the SAP System). "n the operatin system monitor, choose the OS Collectorand Stpushbuttons.

"f SAP-S- is not runnin, start itG for e!ample, usin the operatin system monitor, by choosin OCollector and Start.

heck whether you are usin the current version of SAP-S-. To do this compare the version of

SAP-S- runnin on your host with the current version in the So!tware Catalog athttp244service.sap.com4swcenter'main.

"f the version numbers are not identical, download the newest version (see ownloadin SAP-S-the runnin version and start the new SAP-S- (see Start SAP-S-andStop SAP-S-).

ompare the values displayed in the operatin system monitor and in the ialo /ode of the SAP-S

-peratin System ollector.
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"f the values are identical and the incorrect values are therefore already present in the shared memorysement of SAP-S-, the SAP system is not the cause of the problem. "n this case, restart SAP-Sand delete the shared memory sement after stoppin SAP-S-.

"f the problems persist after a restart, you can find notes for correctin the errors, some of which are p

dependent under ;otes for "ncorrect ata isplay


'efinition


3sers

System





;umber of P3s









etail data for the processes that cause the larest P3 load2

%. Process "B. -wner of the process7. ommand that started the process
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8. Absolute and percentae P3 usae by the processD. 6esident process si+e in kilobytes5. Priority of the process

Use



Current Data Snapshot ,op CP processesin the operatin system monitor (see also etail ata of the

-peratin System /onitor).


'ispla$ Procedure





%. SAP03" should not be runnin on the application server.B. *ou can also display SAP work processes with hih P3 usae with the SAP proces

overview. The SAP process overview displays the AAP proram that is usin the P


'efinition

The data that you can check in the operatin system monitor for memory manaement includes data for the sw

space and pain as well as the physically available memory. The followin values are measured2


http://help.sap.com/saphelp_nw04/helpdata/en/95/df4002597211d3b473006094b910d9/content.htmhttp://help.sap.com/saphelp_nw04/helpdata/en/5e/33c33a3721480be10000000a114084/content.htmhttp://help.sap.com/saphelp_nw04/helpdata/en/5e/33c33a3721480be10000000a114084/content.htmhttp://help.sap.com/saphelp_nw04/helpdata/en/57/7dc33a0f374932e10000000a11402f/frameset.htmhttp://help.sap.com/saphelp_nw04/helpdata/en/95/df4002597211d3b473006094b910d9/content.htmhttp://help.sap.com/saphelp_nw04/helpdata/en/5e/33c33a3721480be10000000a114084/content.htmhttp://help.sap.com/saphelp_nw04/helpdata/en/5e/33c33a3721480be10000000a114084/content.htm


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a pain file on the hard diskG pain occurs if the main memory is not lare enouh for the conte!ts o

runnin processes SAP-S- measures the number of paes paed in and paed out per second w#uantities of memory paed in and paed out in kilobytes.

>ih pain rates indicate that the main memory is too small for the runnin processes. /easthat you can take are to e!tend the main memory, to move processes to other host systems, adelay memory'intensive proram runs to times of lower system workload.

-n 1indows platforms (unlike 3;"$ platforms), the system performs pain out as aprecautionary measure even when space is not re#uired in the workin memory, meathat this value is irrelevant and you should only consider the pain in rate. 3nder 3;

the other hand, PageOutis the critical value for evaluatin the pain.


memory, so that there is space in the main memory for the proram currently bein e!ecuted. SAP-Smeasures the confiured and free swap space in kilobytes and the actual and ma!imum si+e of the swspace in kilobytes.



Use




Function Menu Path


Memory


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Swap


Goto Per!ormance Database Comparerecent ays


Goto Per!ormance Database Compare all

servers


'efinition


%. 9or all ph$sical hard disson a host2

evice name of the hard disk

>ard disk usae H percentae of the time in which the hard disk is bein used

Averae wait #ueue lenth of an input4output re#uest

1ait time in milliseconds durin which a re#uest waits in the wait #ueue

Service time in milliseconds for an input4output

Transferred kilobytes per second

;umber of disk operations per second


;ame of the file system

apacity of the file system in meabytes

9ree storae space in the file system in meabytes


;ame of the A; interface

ata packets received per second
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ata packets sent per second

Errors for received packets per second

Errors for sent packets per second

ollisions per second, in which two stations transport a packet at the same time on the same channelG this leathe destruction of both packets and means that they must be sent aain

Some values are not specified in some network interfacesG for e!ample, there may not be a value for collisionssecond in a token rin architecture. The values specified here do not describe the actual network traffic. Theydescribe the transfers performed with this interface. This means that the errors displayed here refer to the inteand not to the actual network sement.

Use




Function Menu Path


$ilesystem etail


etail

heck the current usae of the A; Goto Current Data Snapshot -%(

etail



$ilesystem etail



Disk etail



-%( etail


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recent ays


Goto Per!ormance Database Compareall servers

Buffer Components

CCMS In sap PI

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