Most important "trick" of performance instrumentation
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The most important trick of performance instrumentation Cary Millsap Accenture Enkitec Group and Method R Corporation @CaryMillsap OakTable World 2014 San Francisco, California 12:50p–1:00p Monday 29 September 2014 © 2014 Method R Corporation 1 TM MeTHOD R TM
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This is the material from my 10-minute TED-style talk 2014-09-29 at OakTable World held in conjunction with Oracle OpenWorld 2014 in San Francisco. It explains the importance of assigning a unique id to the Oracle Database code path associated with each performance experience that users can have with your system
Transcript of Most important "trick" of performance instrumentation
The most important trick of performance instrumentation
Cary MillsapAccenture Enkitec Group and Method R Corporation
@CaryMillsap
OakTable World 2014 ·∙ San Francisco, California12:50p–1:00p Monday 29 September 2014
© 2014 Method R Corporation
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TMMeTHOD RTM
@CaryMillsap
Performance is not an attribute of a system.
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@CaryMillsap
ID USERNAME MODULE START_TIME R SLR-- -------- ------- -------------------------- ----- --- 1 FCHANG OE BOOK 2014-09-15T08:14:22.189533 2.019 2.0 2 RSMITH OE SHIP 2014-09-15T08:14:23.673849 3.528 5.0 3 DJOHNSON OE PICK 2014-09-15T08:15:01.938816 1.211 5.0 4 FFORBES OE BOOK 2014-09-15T08:17:23.815511 0.716 2.5 5 FCHANG OE BOOK 2014-09-15T08:17:24.032562 1.917 2.5 6 LBUMONT PA MTCH 2014-09-15T08:17:42.019328 1.305 2.0
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This thing called an experience...
#define FAST (R ≤ SLR)
@CaryMillsap
ID USERNAME MODULE R SLR FAST?-- -------- ------- ----- --- ----- 1 FCHANG OE BOOK 2.019 2.0 N 2 RSMITH OE SHIP 3.528 5.0 Y 3 DJOHNSON OE PICK 1.211 5.0 Y 4 FFORBES OE BOOK 0.716 2.5 Y 5 FCHANG OE BOOK 1.917 2.5 Y 6 LBUMONT PA MTCH 1.305 2.0 Y
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This thing called an experience...
#define FAST (R ≤ SLR)
@CaryMillsap
Performance is an attribute ofeach individual experience
with a system.
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TASK• id• name• ...
EXPERIENCE• id• task-id• user-id• ip-address• start-time• end-time• ERROR-code• WORK-done
SQL• ID• Task-id• ...
N
1
N
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@CaryMillsap
The “trick”...
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@CaryMillsap
Each experience gets its own
unique id.8
@CaryMillsap
That’s it.
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@CaryMillsap
Each experience gets its own
unique id.10
@CaryMillsap
You need to see this experience id in
your session’s v$ dataand your trace data.
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❶❷
@CaryMillsap
Implementation?
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UNDERCONSTRUCTION
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dbms_application_info.set_module( module_name => 'OE BOOK', action_name => sys_guid() -- 32-char hex string);
-- Your ‘book order’ code
dbms_application_info.set_module( module_name => null, action_name => null);
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SQL, PL/SQL
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conn.ModuleName = "OE BOOK";conn.ActionName = Guid.NewGuid().toString();
// Your ‘book order’ code
conn.ModuleName = "";conn.ActionName = "";
ODP.NET
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@CaryMillsap
String metrics[] = new String[OraCxn.END_TO_END_STATE_INDEX_MAX];
metrics[END_TO_END_MODULE_INDEX] = "OE BOOK";metrics[END_TO_END_ACTION_INDEX] = UUID.randomUUID().toString();conn.setEndToEndMetrics(metrics, (short) 0);
// Your ‘book order’ code
metrics[END_TO_END_MODULE_INDEX] = "";metrics[END_TO_END_ACTION_INDEX] = "";conn.setEndToEndMetrics(metrics, (short) 0);
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Java, ADF
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setClientInfo method supports JDBC DMS metrics
setEndToEndMetrics is deprecated
DBOP tag can be associated with application thread
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New in 12.1
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Oh, and...
module and action lengths are limited by JDBC
(Thanks Lasse Jenssen)
@CaryMillsap
Postscript
A UUID in canonical form is 36 characters long (32 lowercase hexadecimal characters and 4 hyphens). However, v$session.action is VARCHAR2(32), so either we need to perform a more sophisticated transformation than toString upon the UUID (such as to remove the hyphens), or we have to choose another column in which to store it.
We’re also investigating whether the new 12.1 begin_operation function and end_operation procedure in dbms_sql_monitor will accomplish our goal of assigning a unique id to each end-‐user experience. The material at http://docs.oracle.com/database/121/TGSQL/tgsql_monit.htm#TGSQL789 and http://docs.oracle.com/database/121/ARPLS/d_sql_monitor.htm#ARPLS74779 looks promising.
The combination of dbop_name and dbop_eid should be unique, but to meet my needs, these elements would have to render into the session’s trace data.
These are the kinds of things we’re working on.
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What you get
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USERNAME MODULE_NAME ACTION_NAME START_TIME-------- ----------- -------------------------------- ----------FCHANG OE BOOK 4a782ce58c4c462990547500d2fd308d 2014-09-15RSMITH OE SHIP 990a5426012841fa83c0cfa3690fad54 2014-09-15DJOHNSON OE PICK 9d92d1cceb87405f94a04d0224e1c7c4 2014-09-15FFORBES OE BOOK 2c920fc0fb91473ab4c141423e450715 2014-09-15FCHANG OE BOOK 396f1348b5364d578e1815e74e910b43 2014-09-15LBUMONT PA MTCH 7ddbf894941549e9b91b036947cb7328 2014-09-15
experience id (PK)
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DBMS_MONITOR.SERV_MOD_ACT_TRACE_ENABLE( MODULE_NAME => 'OE BOOK', ACTION_NAME => ANY_ACTION // default)
USERNAME MODULE_NAME ACTION_NAME START_TIME-------- ----------- -------------------------------- ----------FCHANG OE BOOK 4a782ce58c4c462990547500d2fd308d 2014-09-15RSMITH OE SHIP 990a5426012841fa83c0cfa3690fad54 2014-09-15DJOHNSON OE PICK 9d92d1cceb87405f94a04d0224e1c7c4 2014-09-15FFORBES OE BOOK 2c920fc0fb91473ab4c141423e450715 2014-09-15FCHANG OE BOOK 396f1348b5364d578e1815e74e910b43 2014-09-15LBUMONT PA MTCH 7ddbf894941549e9b91b036947cb7328 2014-09-15
@CaryMillsap
*** CLIENT ID:(10.17.21.198 FCHANG) ...*** MODULE NAME:(OE BOOK) ...*** ACTION NAME:(4a782ce58c4c462990547500d2fd308d) ...PARSE ...EXEC ...WAIT ......
*** CLIENT ID:(10.17.22.57 FFORBES) ...*** MODULE NAME:(OE BOOK) ...*** ACTION NAME:(2c920fc0fb91473ab4c141423e450715) ...PARSE ...WAIT ...EXEC ......
*** CLIENT ID:(10.17.22.241 FCHANG) ...*** MODULE NAME:(OE BOOK) ...*** ACTION NAME:(396f1348b5364d578e1815e74e910b43) ...EXEC ...WAIT ...FETCH ......
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*** CLIENT ID:(10.17.21.198 FCHANG) ...*** MODULE NAME:(OE BOOK) ...*** ACTION NAME:(4a782ce58c4c462990547500d2fd308d) ...PARSE ...EXEC ...WAIT ......
*** CLIENT ID:(10.17.22.57 FFORBES) ...*** MODULE NAME:(OE BOOK) ...*** ACTION NAME:(2c920fc0fb91473ab4c141423e450715) ...PARSE ...WAIT ...EXEC ......
*** CLIENT ID:(10.17.22.241 FCHANG) ...*** MODULE NAME:(OE BOOK) ...*** ACTION NAME:(396f1348b5364d578e1815e74e910b43) ...EXEC ...WAIT ...FETCH ......
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4a782ce5...4a782ce5...4a782ce5...4a782ce5...
2c920fc0...2c920fc0...2c920fc0...2c920fc0...
396f1348...396f1348...396f1348...396f1348...
ACTION Trace file line------------- -----------------------------------------------------------
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$ mrskew --group='"$act $mod $client_id"' ... --top=10 *trc
ACTION MODULE CLIENT_ID DURATION % CALLS MEAN MIN MAX--------------------------------------------------------------- --------- ------ ------ -------- -------- --------c9a65ad7c62a4de9bb4ad118d9a5eda3 OE BOOK 10.17.23.41 AGREEN 3.162362 3.6% 604 0.005236 0.000000 0.135835b4748d88eea44d81a406e341ea36548f OE BOOK 10.17.22.14 GLAMB 3.115821 3.5% 604 0.005159 0.000000 0.280440f685757c77dd4b15a15d8ce811ee7390 OE BOOK 10.17.23.163 YJUSTICE 1.000578 1.1% 604 0.001657 0.000000 0.0272025d14953834e74063836678babf51e072 OE BOOK 10.17.22.227 USILVA 0.942317 1.1% 604 0.001560 0.000000 0.050971390c18ebfcd84e418b004c71bb3c0589 OE BOOK 10.17.21.63 WEVANS 0.914806 1.0% 604 0.001515 0.000000 0.0305532e5316d0cff448afa5f20de22c044409 OE BOOK 10.17.23.68 VMAYNARD 0.864778 1.0% 604 0.001432 0.000000 0.0402813db7b83fdad34b4289ca06cffaa5e711 OE BOOK 10.17.23.212 JSTRONG 0.786390 0.9% 604 0.001302 0.000000 0.050243f0135a649e124aefb8fb8069bb5bc16d OE BOOK 10.17.22.25 RHOPPER 0.780173 0.9% 604 0.001292 0.000000 0.03142093ff740851704d6dbcac5579e585dd61 OE BOOK 10.17.22.219 FWALLACE 0.758373 0.9% 604 0.001256 0.000000 0.034323ff784d033478490b899b5d04814a1ca8 OE BOOK 10.17.21.246 FROWLAND 0.750675 0.9% 604 0.001243 0.000000 0.0283642,275 others 75.188801 85.2% 10,915 0.006889 0.000000 0.181656-------------------------------------------------------------- --------- ------ ------ -------- -------- --------TOTAL (2,285) 88.265074 100.0% 16,955 0.005206 0.000000 0.280440
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@CaryMillsap
$ mrskew --group='"$act $mod $client_id"' ... --top=10 *trc
ACTION MODULE CLIENT_ID DURATION % CALLS MEAN MIN MAX-------------------------------------------------------------- --------- ------ ------ -------- -------- --------c9a65ad7c62a4de9bb4ad118d9a5eda3 OE BOOK 10.17.23.41 AGREEN 3.162362 3.6% 604 0.005236 0.000000 0.135835b4748d88eea44d81a406e341ea36548f OE BOOK 10.17.22.14 GLAMB 3.115821 3.5% 604 0.005159 0.000000 0.280440f685757c77dd4b15a15d8ce811ee7390 OE BOOK 10.17.23.163 YJUSTICE 1.000578 1.1% 604 0.001657 0.000000 0.0272025d14953834e74063836678babf51e072 OE BOOK 10.17.22.227 USILVA 0.942317 1.1% 604 0.001560 0.000000 0.050971390c18ebfcd84e418b004c71bb3c0589 OE BOOK 10.17.21.63 WEVANS 0.914806 1.0% 604 0.001515 0.000000 0.0305532e5316d0cff448afa5f20de22c044409 OE BOOK 10.17.23.68 VMAYNARD 0.864778 1.0% 604 0.001432 0.000000 0.0402813db7b83fdad34b4289ca06cffaa5e711 OE BOOK 10.17.23.212 JSTRONG 0.786390 0.9% 604 0.001302 0.000000 0.050243f0135a649e124aefb8fb8069bb5bc16d OE BOOK 10.17.22.25 RHOPPER 0.780173 0.9% 604 0.001292 0.000000 0.03142093ff740851704d6dbcac5579e585dd61 OE BOOK 10.17.22.219 FWALLACE 0.758373 0.9% 604 0.001256 0.000000 0.034323ff784d033478490b899b5d04814a1ca8 OE BOOK 10.17.21.246 FROWLAND 0.750675 0.9% 604 0.001243 0.000000 0.0283642,275 others 75.188801 85.2% 10,915 0.006889 0.000000 0.181656-------------------------------------------------------------- --------- ------ ------ -------- -------- --------TOTAL (2,285) 88.265074 100.0% 16,955 0.005206 0.000000 0.280440
$ mrskew --where='$act eq "c9a65ad7c62a4de9bb4ad118d9a5eda3"' *trc
CALL-NAME DURATION % CALLS MEAN MIN MAX--------------------------- -------- ------ ----- -------- -------- --------SQL*Net message from client 3.161922 100.0% 201 0.015731 0.001619 0.135835SQL*Net message to client 0.000440 0.0% 201 0.000002 0.000000 0.000027FETCH 0.000000 0.0% 201 0.000000 0.000000 0.000000EXEC 0.000000 0.0% 1 0.000000 0.000000 0.000000--------------------------- -------- ------ ----- -------- -------- --------TOTAL (4) 3.162362 100.0% 604 0.005236 0.000000 0.135835
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@CaryMillsap
Each experience gets its own
unique id.28
@CaryMillsap
...So you can
measure and diagnose
what people feel.
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@CaryMillsap
...So you can
measure and diagnose
performance.
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@CaryMillsap
For more...http://amzn.to/173bpzg
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@CaryMillsap
Fin
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