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https://issues.apache.org/jira/browse/IMPALA-6656?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong resolved IMPALA-6656.
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Resolution: Fixed
Fix Version/s: Impala 3.2.0
> Metrics for time spent in BufferAllocator
> -----------------------------------------
>
> Key: IMPALA-6656
> URL: https://issues.apache.org/jira/browse/IMPALA-6656
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Reporter: Tim Armstrong
> Assignee: Tim Armstrong
> Priority: Major
> Labels: observability, resource-management
> Fix For: Impala 3.2.0
>
>
> We should track the total time spent and the time spent in TCMalloc so we can
> understand where time is going globally.
> I think we should shard them by CurrentCore() to avoid contention and get
> more granular metrics. We want a timer for the amount of time spent in
> SystemAllocator. We probably also want counters for how many times we go down
> each code path in BufferAllocator::AllocateInternal() (i.e. getting a hit
> immediately in the local area, evicting a clean page, etc down to doing a
> full locked scavenge).
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