1. Performance Schema @nippondanji mikiya (dot) okuno (at) gmail (dot) com

2.

3. Performance Schema

4. MySQL 5.5 5. 6. 7. MySQL

MySQL

8. 9. 10. 11.

12.

13. 14. 15. X 16. 17. 18. CT 19. MRI 20. : NG 21. MySQL 22.

23.

shell> pgrep -x mysqld

24. shell> mysqladmin ping 25. STATUS

Uptime: 79283Threads: 1Questions: 265Slow queries: 0Opens: 219Flush tables: 1Open tables: 53Queries per second avg: 0.3

mysql> STATUS

26. shell> mysqladmin status 27. SHOW

28. 29.

SHOW GLOBAL VARIABLES

30. SHOW GLOBAL STATUS 31. SHOW SLAVE STATUS 32. SHOW BINARY LOGS 33. : 34. INFORMATION_SCHEMA

SQL

SELECT

35. 36. SHOW

SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'hoge';

37. EXPLAIN

38.

EXPLAIN SELECT ;

39. SHOW PROFILE

40. Sending data

set profiling = 1;

41. SELECT 42. SHOW PROFILE; 43.

44.

45. 46. 47. 48. GDB

Optimized away

49. 50.

gdb -p `pgrep -x mysqld`

51. Dtrace/SystemTap...

52. 53. Solaris Linux

dtrace -p `pgrep -x mysqld` -s script_name

54. DBUG

55. 56. /tmp/mysqld.trace

[mysqld]

57. debug 58. 59. 60. PERFORMANCE_SCHEMA!

DTrace SDT

61. Instruments 62. SQL 63. 64. Windows OK 65.

CPU

66. PC

sysbench 12 read-only

67. 2285.76 per sec vs 1804.77 per sec

MB

68. Load Balancer P_S APP 69. INFORMATION_SCHEMA

I_S

I_S

70. 71. SQL 72.

P_S

73. P_S 74. MySQL 75. 76.

MySQL 5.5

77. mysql_install_db 78.

[mysqld]

79. performance_schema 80. 81. SELECT * FROM performance_schema.objects_summary_global_by_type where object_schema='sbtest'G *************************** 1. row *************************** OBJECT_TYPE: TABLE OBJECT_SCHEMA: sbtest OBJECT_NAME: sbtest COUNT_STAR: 25368838 SUM_TIMER_WAIT: 35553955610133 MIN_TIMER_WAIT: 61953 AVG_TIMER_WAIT: 1401180 MAX_TIMER_WAIT: 21716203284 1 row in set (0.01 sec) 82. mysql-5.6-labs-performance-schema

http://labs.mysql.com/

83. MySQL 5.6 84. 85. 86. 87.

setup

88. instance mutex 89. wait event 90. stage event 91. statement event 92. table io event 93. summary 94. Summary events_stages_summary_by_host_by_event_name

wait

95. stage 96. statement 97. table io

by_host_by_event_name

98. by_instance 99. by_thread_by_event_name 100. by_user_by_event_name 101. by_user_host_by_event_name 102. by_global_by_event_name 103.

objects_summary_global_by_type

104. table_io_waits_summary_by_table 105. events_statements_history_long 106.

107. ORDER BY COUNT_STAR DESC

108. pager less 109. create view top_access_tables as select * from performance_schema. objects_summary_global_by_type order by count_star desc limit 10; 110. 111.

P_S

112. Windows 113. 114. 115. 116. 117. Q&A 118.

MySQL

119. Blog: http://nippondanji.blogspot.com/ 120. Twitter: @nippondanji 121. http://www.facebook.com/mikiya.okuno 122.

MySQL[ + ]