KEEP BUFFER POOL Does Not Work for Large Objects on 11g
(Doc ID 1081553.1)
Last updated on JANUARY 30, 2022
Applies to:Oracle Database - Enterprise Edition - Version 188.8.131.52 to 184.108.40.206 [Release 11.1 to 11.2]
Information in this document applies to any platform.
While doing full table scan, Buffer Cache KEEP pool is not being used to read the blocks of a (KEEP) table which size is >10% of DB_KEEP_CACHE_SIZE.
These blocks are always being read through DIRECT READ, which can cause performance problem due to non-caching / re-reading of keep object blocks.
Upgraded to 11g.
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