MySQL 和 InnoDB 性能 http://www.ossez.com/forum.php?mod=viewthread&tid=26844&fromuid=426 (出处: OSSEZ)

1. MySQL and InnoDB
Performance
Baron Schwartz | OSDC 2010

2. MySQL Architecture
MySQL Server
Storage Engines
Parser, Optimizer
Executor, Caches

3. InnoDB Storage Engine
• Transactional, ACID compliant
• Reliable, Stable
• Complex, Flexible
• A History of Poor Scalability

4. Thinking About Performance
Response Time
Is Everything

5. Response Time
R = W + S
Utilization
ResponseTime
S
W

6. Response Time
R = W + S
Utilization
ResponseTime
S
W

7. MySQL & InnoDB In Context

8. MySQL & InnoDB In Context
Operating Environment
MySQL Server
InnoDB

9. Operating Environment
RAM
CPU
I/O
Network

10. Operating Environment
RAM
CPU
I/O
Network
• Fast
• Up to 24 Cores
• Up to 100's of GB
• RAID + BBU
• Fast SAS Disks
• SSD / FusionIO
• XFS Filesystem
• Deadline Scheduler
• High Bandwidth
• Low Latency

11. MySQL Performance
Nested-Loop Joins and Subqueries

12. MySQL Performance
Cache Scalability

13. InnoDB's Single “Main Thread”
• Too Much Work! Purging, Flushing
• Main Thread Cannot Keep Up

14. Special-Purpose Threads
• Main Thread
• Purge Thread
• Multiple Read/Write IO Threads

15. InnoDB Mutex Contention
Buffer Pool

16. Splitting the Buffer Pool Mutex
Buffer Pool Flush List LRU Hash Free

17. Current InnoDB Bottlenecks
• Adaptive Hash Search Mutex
• Index Lock Mutex
• After These Are Solved, ???

18. How To Improve Performance

19. Measure Carefully
Proper diagnosis is 95% of the work

20. Use Good Tools
• New Relic
• MySQL Enterprise Monitor
• Cacti
– http://code.google.com/p/mysql-cacti-templates/
• Maatkit
• GDB, strace, oprofile

21. Instrumentation is Key
• The best performance data is INSIDE MySQL

22. Percona Server with XtraDB
MySQL Server
Storage Engines
Parser, Optimizer
Executor, Caches
Tunability
Instrumentation
Diagnostics

23. Current Benchmarks

24. InnoDB -vs- XtraDB
http://tinyurl.com/xtradb-fusionio-jan-2010
XtraDB is much better than InnoDB in MySQL 5.1.

25. MySQL 5.5 -vs- Percona Server
http://tinyurl.com/xtradb-mysql5-5-ap2010
High performance is no use without stability.

26. Other Technologies
• Cloud Computing
– 2 of the 4 critical resources are uncontrollable
• “NoSQL” Databases
– It's too soon to be sure

27. Summary
• The operating environment is important
• MySQL & InnoDB are getting much faster
• The cloud is not a performance solution
• You are the key to better performance

28. Where Do You Go Next?
• Become a performance practitioner
– Read High Performance MySQL 2nd
Edition
– Read Optimizing Oracle Performance
– Read The Art Of Capacity Planning
– Read http://www.percona.com/about-us/white-papers/
• Contribute!
– Sponsor features you need or want
– Help improve tools