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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-668) long commitlog syncs can cause write pauses
Date Tue, 05 Jan 2010 17:20:54 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-668?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-668:
-------------------------------------

    Component/s: Core

> long commitlog syncs can cause write pauses
> -------------------------------------------
>
>                 Key: CASSANDRA-668
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-668
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>            Priority: Minor
>             Fix For: 0.5, 0.9
>
>         Attachments: 668.patch
>
>
> on a heavily loaded system (deliberately exacerbated by running the bonnie++ i/o benchmarking
tool at the same time as cassandra -- which might not be too far off from the environment
you would see on some VPS hosts), we're seeing CL sync times of 1-5s, causing write pauses.

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