High Waits for "SGA: allocation forcing component growth" and Slow Database Performance in 10g
(Doc ID 1170814.1)
Last updated on NOVEMBER 01, 2019
Applies to:Oracle Database - Enterprise Edition - Version 10.2.0.1 to 10.2.0.5 [Release 10.2]
Oracle Database - Enterprise Edition - Version 10.1.0.4 to 10.1.0.4 [Release 10.1]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Information in this document applies to any platform.
Slow database performance in peak hours.
The AWR shows the following in Top 5 waits table.
Event Waits Time(s) Avg Wait(ms) % Total Call Time Wait Class CPU time 113 85.4 db file sequential read 6,831 7 1 5.4 User I/O SGA: allocation forcing component growth 196 3 16 2.3 Other db file scattered read 2,723 2 1 1.5 User I/O kksfbc child completion 17 1 56 .7 Other
The top waits sections show "SGA: allocation forcing component growth" during peak time which is not there in normal load.
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