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https://issues.apache.org/jira/browse/CASSANDRA-5746?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13710126#comment-13710126
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Jonathan Ellis commented on CASSANDRA-5746:
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What if we redefine the problem to be "how many hints have I generated for node
X?" and get rid of countPendingHints entirely?
ISTM that's a more important indicator of cluster health than how many hints X
expects to get when he comes back up. I can live without that.
> 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: 2.0.1
>
>
> 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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