[mythtv-users] Threaded File Writer 'taking a long time'

[Craig Treleaven]

At 4:28 PM +0100 10/19/12, John Pilkington wrote:
>Over the past few days I've been seeing this quite often.  I don't 
>remember seeing it before.  I first noticed it after an upgrade on 
>Wednesday to mysql 5.5.28-1 on Fedora 16 x86_64, but I can't swear 
>that it hadn't been happening before.  Recordings seem ok but I've 
>seen instances of over 6 seconds.
>
>
>2012-10-19 13:54:18.836330 W 
>TFW(/mnt/sam1/recb/1703_20121019125800.mpg:78): write(55648) cnt 18 
>total 1017644 -- took a long time, 6044 ms
>2012-10-19 13:54:24.314063 W 
>TFW(/mnt/sam1/recb/1703_20121019125800.mpg:78): write(56212) cnt 35 
>total 1977948 -- took a long time, 5477 ms
>2012-10-19 13:54:26.330029 W 
>TFW(/mnt/sam1/recb/1703_20121019125800.mpg:78): write(56024) cnt 19 
>total 1074044 -- took a long time, 1058 ms
>
>The latest mysql changelog includes:
>   - Export THR_KEY_mysys as a workaround for inadequate threading support
>   Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=846602
>
>That report seems to be Fedora-specific.  Has anyone else seen this?

Don't know about MySQL but, using 0.25.2, I was experiencing HDHR 
recordings that would fail.  Thread is on mythtv-dev:

http://www.gossamer-threads.com/lists/mythtv/dev/530543

Bottom line, applying the fix committed to 0.26 has solved the 
problem for me.  Previously, I would have at least one failed 
recording every 1-2 days.  Haven't had one in the last 5 days since 
applying the patch:

http://code.mythtv.org/trac/changeset/dc0bf9b03248775bbd186f4029b217bba9d4b6a6/mythtv

HTH,

Craig