[mythtv] weird pdflush & NFS problem

[Dan Wilga]

At 2:15 PM -0700 2/5/07, Mark Lehrer wrote:
>I have been having some issues with MythTV - whenever it is recording
>a hi def show and playing something back at the same time, there are
>pauses every 30 seconds or so.  These pauses happen when pdflush wakes
>up to write out the disk cache.

I had a similar problem, and was able to minimize its impact by 
actually decreasing the write buffer size of the mounted volume, so 
that it writes more frequently. In /etc/fstab, if you have something 
like:

hostname:/foo /mnt/foo nfs 
rw,nosuid,soft,rsize=8192,wsize=8192,retry=1,bg,actimeo=0,async,nfsvers=3 
0 0

Try changing "wsize" to a smaller number:

hostname:/foo /mnt/foo nfs 
rw,nosuid,soft,rsize=8192,wsize=2048,retry=1,bg,actimeo=0,async,nfsvers=3 
0 0
-- 
Dan Wilga                                                        "Ook."