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https://issues.apache.org/jira/browse/SOLR-17893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18018466#comment-18018466
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ASF subversion and git services commented on SOLR-17893:
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Commit fda4c40f53c8f44de9970d547fd7f6a6d6d6a924 in solr's branch
refs/heads/main from Houston Putman
[ https://gitbox.apache.org/repos/asf?p=solr.git;h=fda4c40f53c ]
SOLR-17893: Use caching to remove Remote Proxy bottleneck (#3614)
> Solr RemoteProxy does not scale when running at a high QPS
> ----------------------------------------------------------
>
> Key: SOLR-17893
> URL: https://issues.apache.org/jira/browse/SOLR-17893
> Project: Solr
> Issue Type: Improvement
> Components: SolrCloud
> Reporter: Houston Putman
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> When running at a high QPS, the Remote Proxy (previously Remote Query) code
> in HttpSolrCall can slow down drastically. This is because two ZK calls are
> made on every request in a synchronous block, because caching is not used
> (And the caching logic in ZkStateReader has a bug). At QPS > 1k, these
> synchronized ZK calls become very burdensome if not running in an embedded
> mode.
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