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https://issues.apache.org/jira/browse/CASSANDRA-5746?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13712775#comment-13712775
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Jonathan Ellis commented on CASSANDRA-5746:
-------------------------------------------
LGTM, committed. (Tweaked to use LoadingCache.getUnchecked instead of manually
throwing RTE ourselves, also in the existing incrPastWindow.)
> HHOM.countPendingHints is a trap for the unwary
> -----------------------------------------------
>
> Key: CASSANDRA-5746
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5746
> Project: Cassandra
> Issue Type: Bug
> Components: Core, Tools
> Reporter: Jonathan Ellis
> Assignee: Tyler Hobbs
> Fix For: 2.0 beta 2
>
> Attachments: 0001-Remove-HHOM.countPendingHints.patch,
> 0002-Report-created-hint-count-by-endpoint.patch
>
>
> countPendingHints can OOM the server fairly easily since it does a per-target
> seq scan without paging.
> More generally, countPendingHints is far too slow to be useful for routine
> monitoring.
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