[mythtv-users] mythtv backend causing system slowdown

[Jerry Rubinow]

On Thu, Jan 21, 2010 at 5:05 PM, chris biddick <c.biddickfam at gmail.com>wrote:

> Hi Folks;
>
> I tried searching for any help here, but didnt find anything yet, so here
> goes:
>
> I have been running a successful Mythbuntu BE/FE system, with a remote FE
> for a few weeks now.
>
> The only problem I have not been able to sort out is this:
> The BE gets extremely slow after a few days.  The symptoms include :
> On the BE:
> greyed screens & extremely long page loads in firefox, loading any program
> is extremely slow - local use of the BE becomes impossible.
> (The Local FE was only used during setup & troubleshooting, no longer used
> since I setup the remote FE)
>
> On the remote FE:
> It loads / runs fine, except when the BE exhibits those symptoms, then the
> FE will freeze when going to the Recorded Media list, and loading the System
> Status page is slow.
>
> If I reboot the BE, everything is fine until a couple days later.
> ( can record 2 programs at same time and see no local slowdown immediately,
> although I can hear the data being dumped to the SATA
> drive...chunk...chunk...chunk)
> Commercial flagging & any transcoding is scheduled to only take place from
> Midnite to 5 am, since CommFlag gobbles up most of the cpu)
>
> quick system rundown:
> Ubuntu 9.1 with mythtv BE & FE installed later
> MB:  Gigabyte GA-MA78GM-S2H
> CPU: AMD Phenom X2
> Mem:  1GB
> HD : OS on 320GB SATA
> LiveTV: recorded to folder on same HD as OS
> Recordings: recorded to separate 1TB HD
> (this drive dedicated to Mythtv - sans LiveTV)
> [ I had to add this drive, since I filled the 320GB in about a week  :-)  ]
> Tuner:  Hauppauge pvr-500  (using both tuners, recording from cable-tv)
>          all recording are SD -
>
> the remote FE is:
> MB:  Asus A7N266-VM
> Video: Nvidia 6200 based
> Playback:  SD only - still fiddling with best decoding/de-interlacing
> settings
>
>
> Any help in pointing me to the right path would be greatly appreciated...
> the WAF is good, except when she cannot use the BE locally!!
>
> Thanks in advance, Chris
>
>
The first thing I'd check is what the BE is doing.  Check CPU usage (top),
memory usage (cat /proc/meminfo), disk space usage (df). Check after a
reboot, and check when it's being slow.

-Jerry
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