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https://issues.apache.org/jira/browse/PHOENIX-6694?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17528173#comment-17528173
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ASF GitHub Bot commented on PHOENIX-6694:
-----------------------------------------
joshelser commented on PR #78:
URL:
https://github.com/apache/phoenix-connectors/pull/78#issuecomment-1109807527
Rajeshbabu said in private that it looks like we can't wholesale copy the
`QueryPlan` into the workers, but we have to try to pull out the important
details.
> Share the query plan generated in data source reader in partition readers to
> avoid the unnecessary touch basing system tables and meta table in all the
> workers.
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: PHOENIX-6694
> URL: https://issues.apache.org/jira/browse/PHOENIX-6694
> Project: Phoenix
> Issue Type: Bug
> Components: spark-connector
> Reporter: Rajeshbabu Chintaguntla
> Assignee: Rajeshbabu Chintaguntla
> Priority: Major
>
> Currently we are preparing the query plan in both data source and partition
> readers which is creating new connection in each worker and job
> initialisation which unnecessarily touch basing all both system catalog
> table, system stats table as well as meta. When there are jobs with millions
> of parallel workers hotspot the region servers holding the meta and system
> catalog as well system stats table. So if we share the same query plan
> between the workers which can avoid the hotspot.
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