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From "Jun Rao (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-675) TcpReader is slow because of using Exception handling in the normal path
Date Wed, 13 Jan 2010 16:54:54 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-675?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12799822#action_12799822
] 

Jun Rao commented on CASSANDRA-675:
-----------------------------------

The exception change and the selector change are independent. Probably more than 70% of the
benefit comes from the former. Will people be interested in porting just the first change
to 0.5?

> TcpReader is slow because of using Exception handling in the normal path
> ------------------------------------------------------------------------
>
>                 Key: CASSANDRA-675
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-675
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 0.9
>            Reporter: Jun Rao
>            Assignee: Jun Rao
>             Fix For: 0.9
>
>         Attachments: issue675.patchv1, issue675.patchv2
>
>
> TcpReader has the overhead of 1-2ms per message reading. This makes quorum reads too
slow.

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