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https://issues.apache.org/jira/browse/CASSANDRA-13508?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16746655#comment-16746655
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Ariel Weisberg commented on CASSANDRA-13508:
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I don't think a paxos table per table is the right way to go about it. The key
for the paxos table should just be the partition key. If multiple tables share
the same partition key then you can do transactions across them. We want to
head in the direction of more expressive not less.
> Make system.paxos table compaction strategy configurable
> --------------------------------------------------------
>
> Key: CASSANDRA-13508
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13508
> Project: Cassandra
> Issue Type: Improvement
> Components: Legacy/Coordination
> Reporter: Jay Zhuang
> Assignee: Jay Zhuang
> Priority: Major
> Labels: LWT, core, paxos
> Fix For: 4.x
>
> Attachments: test11.png, test2.png
>
>
> The default compaction strategy for {{system.paxos}} table is LCS for
> performance reason: CASSANDRA-7753. But for CAS heavily used cluster, the
> system is busy with {{system.paxos}} compaction.
> As the data in {{paxos}} table are TTL'ed, TWCS might be a better fit. In our
> test, it significantly reduced the number of compaction without impacting the
> latency too much:
> !test11.png!
> The time window for TWCS is set to 2 minutes for the test.
> Here is the p99 latency impact:
> !test2.png!
> the yellow one is LCS, the purple one is TWCS. Average p99 has about 10%
> increase.
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