| Cache_hit_rate |
The percentage of total database sessions that were accessed from the cache |
Percent
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If the value of this measure is over 85%, it is a sign of good health. Values lesser than 85% might warrant a change in the cache size using the CAT_CACHE_SUPPLY parameter. The detailed diagnosis of this measure, if enabled, provides a list of session IDs, the number of attempts made to access each session, and the number of times every listed session was successfully accessed from the cache.
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