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https://issues.apache.org/jira/browse/SOLR-8856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15197515#comment-15197515
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Mark Miller commented on SOLR-8856:
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Not caching on read once should help too - we will no longer run replication of
indexes through the block cache.
> Do not cache merge or read once contexts in the hdfs block cache.
> -----------------------------------------------------------------
>
> Key: SOLR-8856
> URL: https://issues.apache.org/jira/browse/SOLR-8856
> Project: Solr
> Issue Type: Improvement
> Reporter: Mark Miller
> Assignee: Mark Miller
> Attachments: SOLR-8856.patch
>
>
> Generally the block cache will not be large enough to contain the whole index
> and merges can thrash the cache for queries. Even if we still look in the
> cache, we should not populate it.
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