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https://issues.apache.org/jira/browse/HIVE-21045?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Karthik Manamcheri updated HIVE-21045:
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Attachment: HIVE-21045.4.patch
> Add HMS total api count stats and connection pool stats to metrics
> ------------------------------------------------------------------
>
> Key: HIVE-21045
> URL: https://issues.apache.org/jira/browse/HIVE-21045
> Project: Hive
> Issue Type: Improvement
> Components: Standalone Metastore
> Reporter: Karthik Manamcheri
> Assignee: Karthik Manamcheri
> Priority: Minor
> Attachments: HIVE-21045.1.patch, HIVE-21045.2.patch,
> HIVE-21045.3.patch, HIVE-21045.4.patch
>
>
> There are two key metrics which I think we lack and which would be really
> great to help with scaling visibility in HMS.
> *Total API calls duration stats*
> We already compute and log the duration of API calls in the {{PerfLogger}}.
> We don't have any gauge or timer on what the average duration of an API call
> is for the past some bucket of time. This will give us an insight into if
> there is load on the server which is increasing the average API response time.
>
> *Connection Pool stats*
> We can use different connection pooling libraries such as bonecp or hikaricp.
> These pool managers expose statistics such as average time waiting to get a
> connection, number of connections active, etc. We should expose this as a
> metric so that we can track if the the connection pool size configured is too
> small and we are saturating!
> These metrics would help catch problems with HMS resource contention before
> they actually have jobs failing.
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