[
https://issues.apache.org/jira/browse/CASSANDRA-668?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12796769#action_12796769
]
Jonathan Ellis commented on CASSANDRA-668:
------------------------------------------
There's still some mystery here, because the commitlog was on a separate device
+ xfs filesystem, so syncing that shouldn't have to wait for IO from the data
filesystem. But short term this patch is better than nothing.
> long commitlog syncs can cause write pauses
> -------------------------------------------
>
> Key: CASSANDRA-668
> URL: https://issues.apache.org/jira/browse/CASSANDRA-668
> Project: Cassandra
> Issue Type: Bug
> 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.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
