Flash cache can't be 100% fully utilized (Doc ID 1490043.1)

Last updated on APRIL 06, 2015

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.3 and later
Information in this document applies to any platform.

Symptoms

Flash cache is configured, but not 100% used. Only 1% of the configured flash cache size can be used.

Example:
Following settings are configured to make use of 4GB flash cache

*.db_block_size=32768
*.db_flash_cache_file='/dev/md/rdsk/d29'


However, below SQL output indicates that only 22338 flash blocks are used (32KB for every block, so around 700MB in total).

 

Cause

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