[mythtv-users] Laggy time-seeks?
enigma at strudel-hound.com
Tue Feb 6 08:23:32 UTC 2007
Steven Adeff wrote:
> On 2/5/07, William Pettersson <enigma at strudel-hound.com> wrote:
>> I've had this mythtv setup running for a while now. I have a backend
>> with one tuner, and the hard drives. It's an XP1700+, 512MB RAM. Over
>> a 100MBit network we get to my frontend, a 3500+ with 2GB of RAM, and an
>> NVidia gfx card.
>> Ever since a blackout about a week ago, I've had 2-3 seconds of lag
>> between pressing "right" or "left", and the video catching up. During
>> these 2-3 seconds, audio continues going as normal, while video freezes.
>> After this, it seeks and starts playing at the expected time.
>> The backend runs at 0.00 to 0.05 load averages. The frontend is roughly
>> the same. According to 'top', the backend uses less than 5% CPU
>> (including mysqld and nfs). The frontend uses around 10% of the CPU
>> while watching (standard def. digital).
>> The network does support 100MBit, while watching TV I can also get
>> transfer rates of 9.4 MB/s, and I can break 10 MB/s if I don't do
>> anything on the network.
>> Anyone able to think of reasons behind my lag during timeseeks?
> have you run optimize_mythdb.pl lately? (you should really be running
> it once a day if your not already.)
I hadn't, no. On a side-note, does anyone know where Gentoo installs this?
Anyway, I found in in the tarball, and ran it. It apparently optimized
some tables. However, while improving performance slightly (maybe?
partially? a little bit?), it fixed all my problems.
See what I did there?
Thanks Steven :)
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