Exalytics and Oracle In-Memory Database: Query Performance and Hard Parse Times Longer than Expected
Last updated on JANUARY 22, 2016
Applies to:Oracle Exalytics Software - Version 18.104.22.168.0 and later
Oracle Database - Enterprise Edition - Version 22.214.171.124 and later
Information in this document applies to any platform.
When using Oracle Database In-Memory 126.96.36.199 (IMDB) on an Oracle Exalytics server, the query performance is less than expected.
For example, if setting optimizer_features_enable:
Setting it to optimizer_features_enable='188.8.131.52' improves query performance (< 1 second).
Resetting it to optimizer_features_enable='184.108.40.206' slows query performance (7 - 10 seconds)
Expecting performance to be better with 220.127.116.11 than it is with 18.104.22.168, but explain plan shows longer time in the hard parse phase.
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