[mythtv] [mythtv-commits] Ticket #9503: Very sluggish UI during reschedules especially
Michael Rice
mikerice1969 at gmail.com
Sun Jan 23 02:46:17 UTC 2011
On Sat, Jan 22, 2011 at 5:35 PM, Raymond Wagner <raymond at wagnerrp.com> wrote:
> On 1/22/2011 20:21, MythTV wrote:
>>
>> #9503: Very sluggish UI during reschedules especially
>>
>> I am experiencing very sluggish UI on my frontend (backend on another
>> machine). It happens frequently but I usually notice a problem when a
>> reschedule is happening.
>
> The scheduler is extremely database intensive, and other operations that
> depend on the database (pretty much everything) can stall while the
> scheduler is running. Could this be a simple case of insufficient CPU/disk
> performance?
>
> What CPU do you have running your database? What kind of disk is it on?
> Were you running other intensive IO operations on that disk at the same
> time? Are you going into swap at all?
CPU is: Intel(R) Core(TM)2 CPU 6300 @ 1.86GHz
Both cores running at about 1% until a reschedule then one core
goes to about 65%
1 GB Ram
top reports about 990Mb used and about 100Mb swap used.
No noticeable change during a few reschedules I just tried.
OS/database is on 300Gb IDE drive (maybe SATA not sure atm)
all recordings going to one of two 2Tb SATA drives.
No changes to the hardware/config since I was successfully running
0.22 on Fedora 12. Now on Fedora 14 though.
I've recently tried using mysqltuner.pl and changing some settings as
suggested but it hasn't made a difference in query time.
I'll check if it is reproducible with nothing else going on when I get the
chance.
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