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Profiling General Instance Activity§ Analyzing Global Waits§ Some File IO events to watch for:– wait/io/file/sql/FRM– Tune table_open_cache / table_definition_cache– wait/io/file/sql/file_parser (View definition parsing)– If high on 5.5, upgrade to 5.6 (which caches these)– wait/io/file/sql/query_log / wait/io/file/sql/slow_log– Disable General / Slow query logs34Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
Profiling General Instance Activity§ Top Files by Total IO – file_summary_by_instanceHigh IO on per-tablespace tablesare candidates for a separatemountpoint / diskwith “DATA DIRECTORY”35Copyright © 2012, Oracle and/or its affiliates. All rights reserved.
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