Flash cache can't be 100% fully utilized
(Doc ID 1490043.1)
Last updated on FEBRUARY 10, 2022
Applies to:
Oracle Database - Enterprise Edition - Version 11.2.0.3 and laterOracle Database Cloud Schema Service - Version N/A and later
Gen 1 Exadata Cloud at Customer (Oracle Exadata Database Cloud Machine) - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A 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).
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |