Performance schema 설정

EXEM technical report no.012 Ver. 12016.07.28

Performance SchemaConfiguration In MySQL 5.6

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Performance Schema 세부설정


Performance SchemaPerformance_schema 설정

Performance Schema의 세부적인 설정을 위한 테이블 목록

setup_actors : 모니터링 대상 유저 설정

setup_consumers : 모니터링 데이터 테이블 설정

setup_instruments : 모니터링 지표 설정

setup_objects : 모니터링 대상 오브젝트 설정

setup_timers : 모니터링 타이머 값(단위) 설정

PS 설정테이블목록



select * from performance_schema.setup_consumers;

1. setup_consumers기본설정값확인



update performance_schema.setup_consumers set enabled='no' where name not in ('global_instrumentation','thread_instrumentation');update performance_schema.setup_consumers set enabled='yes' where name in ('events_waits_current');select * from performance_schema.setup_consumers;

2. setup_consumer설정



select substr(name,1,instr(concat(name,'/%/'),'/')) instrument_type ,enabled,timed, count(*) from performance_schema.setup_instrumentsgroup by 1,2,3;

3. setup_instruments기본설정값확인



update performance_schema.setup_instruments set enabled='no', timed='no';

update performance_schema.setup_instruments set enabled='yes', timed='yes' where name like 'wait%';

4. setup_instruments초기화후필요한지표만설정


Performance Schema

select substr(name,1,instr(concat(name,'/%/'),'/')) instrument_type ,enabled,timed, count(*) from performance_schema.setup_instrumentsgroup by 1,2,3;

Performance_schema 설정

5. setup_instruments설정값확인



6. Wait Event class별설정

[ wait event 클래스 ]

set @mutex='wait/synch/mutex%';set @rwlock='wait/synch/rwlock%';set @cond='wait/synch/cond%';set @iofile='wait/io/file%';

[ 클래스단위설정 ]

update performance_schema.setup_instruments set enabled='[yes|no]', timed=‘[yes|no]‘[where name like @클래스명];


Performance_schema 설정에 따른 벤치마크


Performance SchemaPerformance_schema 벤치마크

[테스트 환경]performance_schema = OFF

[테스트 결과]OLTP test statistics:

queries performed:read: 7002324write: 2000202other: 1000166total: 10002692

transactions: 500000 (2401.68 per sec.)read/write requests: 9002526 (43242.40 per sec.)other operations: 1000166 (4804.16 per sec.)ignored errors: 166 (0.80 per sec.)reconnects: 0 (0.00 per sec.)

General statistics:total time: 208.1875stotal number of events: 500000total time taken by event execution: 20817.1200sresponse time:

min: 3.08msavg: 41.63msmax: 2122.08msapprox. 95 percentile: 79.18ms

Threads fairness:events (avg/stddev): 5000.0000/88.49execution time (avg/stddev): 208.1712/0.00



[테스트 환경]performance_schema = ONsetup_instruments => NO









[테스트 환경]performance_schema = ONsetup_instruments => YES









[테스트 환경]performance_schema = ONsetup_instruments => YES (only wait event)









Performance_schema Setup_Instruments TPS Response time (AVG) Total time

OFF - 2401.68 41.63ms 208.1875s

ON NO 2365.31 (-1.51%) 42.27ms (+1.54%) 211.3884s

ON YES 2064.60 (-14.04%) 48.43ms (+16.33%) 242.1771s

ON Wait events only 2298.90 (-4.28%) 43.49ms (+4.47%) 217.4958s

[테스트 환경]

OS Memory : 8GB

OS Processors : 8

DB Version : MySQL 5.6.14

Benchmark Tool : SysBench(OLTP)

Transactions : 500000

Threads : 100

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Performance schema 설정

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