ZFS Stability & MySQL (Comments Requested)

Jason J. W. Williams jasonjwwilliams at gmail.com
Fri Apr 30 21:39:46 UTC 2010

Hi Pierre,

By chance did you attempt to write a test file to the ZFS filesystem
holding the database and logs? Just curious if ZFS was hung since a
MySQL restart corrected it. Thank you for your help.


On Fri, Apr 30, 2010 at 2:21 PM, Pierre Massat <depaulou at efrei.fr> wrote:
> On Fri, Apr 30, 2010 at 3:14 PM, Jason J. W. Williams
> <jasonjwwilliams at gmail.com> wrote:
>> What was the iowait when the update hangs occurred? Also, what was the box's
>> uptime approx when it happened? Have you surpassed that amount of uptime
>> since? Were you able to DTrace MySQL to see what func was hanging?
> The iowait was 0.0% when the hangs occurred and the uptime of the box
> was something around 120 days and it's currently 166 days (I only
> stopped MySQL daemon which was around 60 days of uptime and now 46
> days).
> Unfortunately, I wasn't able to dtrace MySQL.
> --
> Pierre Massat

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