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https://issues.apache.org/jira/browse/ZOOKEEPER-4794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated ZOOKEEPER-4794:
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Labels: pull-request-available (was: )
> Reduce the ZKDatabase#committedLog memory usage
> -----------------------------------------------
>
> Key: ZOOKEEPER-4794
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4794
> Project: ZooKeeper
> Issue Type: Improvement
> Components: server
> Affects Versions: 3.9.1
> Reporter: Yan Zhao
> Priority: Critical
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In ZKDatabase, after a quorum request is committed successfully, the
> ZKDatabase will wrap the request into a proposal and store it in the
> committedLog.
> The wrap operation: Serialize the request to a byte array and wrap the byte
> array in the QuorumPacket, so if the request payload size is 1M, the Proposal
> will occupy 2M memory, which will increase the memory pressure.
> The committedLog is used for fast follower synchronization, so we can
> serialize the request in the synchronization of the processes, no need to
> serialize the request in advance.
> It can reduce half of the memory for committedLog
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