Presentation (PDF) - MySQL

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An Introduction to Performance Schema§ Performance Schema Overview§ A new default performance_schema schema within <strong>MySQL</strong>§ Tables use new PERFORMANCE_SCHEMA storage engine– Real engine, unlike INFORMATION_SCHEMA§ Records various run time statistics via in-built instrumentation points§ All recorded statistics are stored in fixed size ring buffers in memory§ Most instrumentation configuration can be done dynamically4Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
An Introduction to Performance Schema§ Instrumentation Points§ At it’s core, Performance Schema tracks latency for various events§ Latency is exposed to picosecond precision (a trillionth of a second)§ In 5.5:– File I/O, Mutexes, Read/Write Locks, Conditions§ In 5.6:– Network I/O, Table I/O, Table Locks, Stages, Statements, Idle§ Also tracks other data as appropriate, like bytes, source position, etc.5Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
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