Practical MySQL Performance Optimization...It is Application Performance what Matters! Use Right...
Transcript of Practical MySQL Performance Optimization...It is Application Performance what Matters! Use Right...
Peter Zaitsev, CEO, Percona July 20th, 2016
Percona Technical Webinars
Practical MySQL Performance Optimization
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In This Presentation We’ll
Look at how to approach Performance Optimization
Discuss Practical Performance Optimization Tips
Look at the Tools which can help us
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First Things First
MySQL Performance does not Matter!
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What DOES Matter?
Application Performance!
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Even More so
Application Performance Always Matters!
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Take Away
Performance Problems might not be MySQL
Performance Solutions might not
be with MySQL
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Many “Tools”
• MongoDB • Cassandra • Hadoop • Spark • Elastic • Redis
Use the best
Tool for the job
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Say Performance
Think about Response Time
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Related Issues
Stability
Scalability
Efficiency
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Scalability?
• Load • Data Size • Infrastructure
Scalability with:
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Performance “Sandbags”
Security
Manageability
Compatibility
Compliance
Ease of use by Developers
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“Good Enough”
You can always
improve your system. Know when to stop.
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What MySQL Does
• Selects • Inserts • Deletes • Updates
Processes Queries
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What to focus on?
• Making queries run faster
• Using less resources
• Scaling better
Performance Optimization
focused
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Transaction Optimization
• Find out which queries it runs
• Optimize them
Specific Application Transaction
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General Optimization
• Prioritize them • Optimize them
Look at what
queries Server Runs
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Queries
• Get rid of them? • Can we change them to be doing less work?
Are those the
right queries ?
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Things to Consider
• But avoid focusing only on outliers
Do not look at the average case only
• Consider daily, weekly, monthly cycles
Look at trends over time
• Data size change? Cardinality?
Think about future
performance
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Query Tips
Do less queries – latency and overhead
Read less data; Modify less data
Less data processing on the fly
How much data is traversed vs sent
How much data is sent vs used by app
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Schema
• Minor Schema changes
• Data Architecture
Look at Schema
and Queries together
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Schema Tips
• http://bit.ly/1rAtamE Learn Indexing
• Starting with Text book schema is OK ending is likely not
Design Schema for data access
• Partitioning & Sharding • Normalization and Denormalization • Covering Indexes
Technics
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The Following Also Matter
Infrastructure
Operating System and Configuration
MySQL Version
MySQL Configuration
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Optimization Process
Low Hanging Fruit
• MySQL Configuration
• OS Settings • Indexes • Caching
Medium Level
• Infrastructure • OS • MySQL
Version
Hard Changes
• Major schema changes
• Application architecture change
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Infrastructure
Scaling Up or Out
• One MySQL Node
• Many MySQL Nodes
Type
• Public Cloud • Private Cloud • Bare Metal
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Hardware
CPU
Memory
Disk
Network
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CPU
Intel owns the market
2 sockets commonly used
Faster cores or more cores
Turboboost
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Memory
Main purpose – Cache
Think Database size vs Memory
Look together with Storage Optimization
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Invest in Memory or Storage
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Storage
Types
• Directly Attached
• SAN • NAS • Virtualized • Cloud
Flash
• PCI-E • SATA
“Disks” • TLC, MLC,
eMLC, SLC
RAID
• Hardware • Software • Filesystem
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Network
Latency
• Distance • Number of
“Hops”
Throughput
• 1Gb is a must, trunking recommended
• 10Gb increasingly affordable
Availability
• Bonding • Multipath
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OS Choices
Linux
Server grade
Recent
Supporting MySQL well
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OS Tuning
Defaults are good for common workloads
Filesystem: EXT4 or XFS
More Detail http://bit.ly/MySQLonLinux
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MySQL Version
New versions typically improve performance
MySQL 5.7 – Current GA
Scalability, Improved Optimizer, etc.
Expect some regressions
Try Percona Server 5.7
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MySQL Configuration
Do not run with defaults
Do not ever obsess with tuning
More Details: http://bit.ly/1vth5Cu
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MySQL Tuning in 1 slide
• max_connections • log_bin • table_open_cache_size • table_definitions_cache_size • open_files_limit • innodb_buffer_pool_size • innodb_log_file_size • Innodb_flush_log_at_trx_commit • Innodb_flush_method=O_DIRECT
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Tools and The Process
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Process
• Do not bring bad queries and schema in production
Developers Part
• Catch bad queries • Validate changes in hardware,
configuration, versions
Operations Process
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Queries will be impacted
Hardware Changes
Configuration
MySQL Version Changes
Impact of Data Growth
Changes to the Query Mix
Optimizer Plan Changes
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Tools
PT-Query-Digest from Percona Toolkit
MySQL Enterprise Monitor
MonYog
VividCortex
PMM (Percona Monitoring and Management)
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More on PMM
Percona’s Open Source solution for MySQL and MongoDB Monitoring
Currently In Beta
Planning to add Management in the Future
Check it out yourself at http://pmmdemo.percona.com
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Quick PMM Demo
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To Sum it Up
It is Application Performance what Matters!
Use Right Tools for Right Job
See what Queries MySQL is Running
Reduce Number of Queries
Reduce Data They Return
See how they can do less work
Do that work more efficiently
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Join us at Percona Live Europe! When: October 3-5, 2016 Where: Amsterdam, Netherlands The Percona Live Open Source Database Performance Conference is a great event for users of any level using open source database technologies.
• Get briefed on the hottest topics • Learn about building and maintaining high-performing deployments • Listen to technical experts and top industry leaders Get the early bird rate before prices go up on July 26th! Register now Sponsorship opportunities available as well here.
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Peter Zaitsev https://www.linkedin.com/in/peterzaitsev
P.S We’re Hiring
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Thank You!