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https://issues.apache.org/jira/browse/CASSANDRA-3386?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis updated CASSANDRA-3386:
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Attachment: 3386.txt
Patch skips the synchronization when there are no mutated index columns. (I'm
99% sure that's the only reason we need to lock there...)
> Avoid lock contention in hint rows
> ----------------------------------
>
> Key: CASSANDRA-3386
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3386
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Affects Versions: 0.7.0
> Reporter: Jonathan Ellis
> Assignee: Jonathan Ellis
> Fix For: 0.8.8, 1.0.1
>
> Attachments: 3386.txt
>
>
> As pointed out by Yang in CASSANDRA-3385, hint writes are keyed by target IP,
> to make replay efficient. However, this means that we'll hit a lot of lock
> contention in table.apply where we synchronize for potential index updates.
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