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https://issues.apache.org/jira/browse/IMPALA-9472?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joe McDonnell resolved IMPALA-9472.
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Fix Version/s: Impala 4.0
Resolution: Fixed
> 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
> Assignee: Joe McDonnell
> Priority: Major
> Fix For: Impala 4.0
>
>
> 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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