Joe McDonnell created IMPALA-9472:
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Summary: Keep metrics about the performance of the IO device used
for the data cache
Key: IMPALA-9472
URL: https://issues.apache.org/jira/browse/IMPALA-9472
Project: IMPALA
Issue Type: Improvement
Components: Backend
Affects Versions: Impala 3.4.0
Reporter: Joe McDonnell
The performance of the cache will be related to the performance of the
underlying disk. It is useful to add metrics to track how long it takes to
read, write, and eviction entries for the cache. This should be tracked on a
per-partition basis. In the case of reads, the performance can give an
indication of how often the OS has kept a cache entry in buffer cache or not.
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