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Database Tuning (MOSC)

Why are AWR reports lightweight?

Oct 20, 2021 4:35AM in Database Tuning (MOSC) 1 commentAnswered

Why are AWR reports lightweight (1 to several MB)?

Is it because the SQL accumulated in the AWR snapshot is narrowed down by the TOPN SQL value of dba_hist_wr_control?

If TOPNSQL is DEFAULT and STATISTICS_LEVEL is TYPICAL, only the top 30 SQLs are narrowed down and saved as AWR snapshots.

https://docs.oracle.com/cd/E16338_01/appdev.112/b56262/d_workload_repos.htm

So if TOPNSQL is DEFAULT, can you understand that the AWR report cannot be on the order of hundreds of megabytes?

Version

Oracle Database - Enterprise Edition 12.2.0.1

0

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