[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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