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https://issues.apache.org/jira/browse/PHOENIX-5556?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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chenglei updated PHOENIX-5556:
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Attachment: PHOENIX-5556_v1-4.x-HBase-1.4.patch
> Avoid repeatedly loading IndexMetaData For IndexRegionObserver
> ---------------------------------------------------------------
>
> Key: PHOENIX-5556
> URL: https://issues.apache.org/jira/browse/PHOENIX-5556
> Project: Phoenix
> Issue Type: Bug
> Affects Versions: 4.15.0, 5.1.0
> Reporter: Chenglei
> Assignee: chenglei
> Priority: Major
> Attachments: PHOENIX-5556_v1-4.x-HBase-1.4.patch
>
>
> Loading {{IndexMetaData}} is a somewhat expensive operation because it may
> deserialize from scan attribute. In following
> {{IndexRegionObserver.preBatchMutateWithExceptions}} method,
> {{IndexMetaData}} is loaded already for line 613, but in
> {{IndexRegionObserver.prepareIndexMutations}} method which is invoked by line
> 639, {{IndexMetaData}} is loaded again, which is unnecessary.
> {code:java}
> 610 public void
> preBatchMutateWithExceptions(ObserverContext<RegionCoprocessorEnvironment> c,
> 611 MiniBatchOperationInProgress<Mutation> miniBatchOp)
> throws Throwable {
> 612 ignoreAtomicOperations(miniBatchOp);
> 613 BatchMutateContext context = new
> BatchMutateContext(this.builder.getIndexMetaData(miniBatchOp).getClientVersion());
> 614 setBatchMutateContext(c, context);
> 615 Mutation firstMutation = miniBatchOp.getOperation(0);
> ....
> 639 prepareIndexMutations(c, miniBatchOp, context, mutations, now);
> 640
> metricSource.updateIndexPrepareTime(EnvironmentEdgeManager.currentTimeMillis()
> - start);
> {code}
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