[mythtv-users] Very slow EPG guide - movement, etc (XMLTV source, 66 channels)

Rafael Moslin rafmoslin at gmail.com
Sun Feb 7 19:28:08 UTC 2010

On 7 February 2010 19:19, David Kubicek <foceni at gmail.com> wrote:

> On 02/07/2010 07:08 PM, Michael T. Dean wrote:
>> On 02/07/2010 08:59 AM, David Kubicek wrote:
>>> I have a problem with the Program Guide, be it called from the LiveTV
>>> or the main menu. After opening, it's loading for about 4sec. When
>>> that's finished (loaded) it takes about 4sec to move the cursor just
>>> one line up or down, and about 1sec to move left and right. Because of
>>> this, the guide is almost unusable. I have to schedule all my
>>> recordings via MythWeb, which is rather impractical, because the whole
>>> setup is /intended to be/ completely standalone, operated with just a
>>> bluetooth PS3 BD remote.
>>> My setup is Core 2 Duo 2.8GHz, local FE+BE+DB [SVN trunk], disk is SSD
>>> OCZ Vertex Turbo (measured 250MB/s sustained read). I think that's
>>> quite a powerful machine, it shouldn't be an issue. I have 66 unique
>>> channels (80 total), two video sources with different providers and
>>> the combined XMLTV I generate for 12 days ahead is usually about 14MB
>>> (there's all kinds of details - long descriptions, sub-titles, ep
>>> info, complete credits, premiere/last-showing, icon URL's, rating,
>>> years, dates, categories, etc).
>>> I'd like to ask if this is a known issue and/or what can I do about
>>> it? The basic guide doesn't contain much information, it shows 4 time
>>> slots per 5 channels, no details, only program titles and categories.
>>> It shouldn't be so resource intensive (if that's the reason).
>>> I'm a programmer myself - if there are any suggestions w.r.t.
>>> optimizations or code changes, I'm volunteering to do it and test it.
>> Likely broken channel icons if it's only in the EPG.
>> If it's also slow in Watch Recordings, it's probably either broken
>> clocks and/or broken image caching support (i.e. fix your $HOME/.mythtv
>> directory/mount options/permissions).
> Great suggestion, actually, because my current XMLTV grabber is the first
> one to include channel icon URL's! :) That could be it. I'll check it out.
> Can't imagine how permissions would cause such delays, open() just succeeds
> or fails, but I'm filling the DB as root for now (while tuning my new
> grabber) and channel icons are in /root/.mythtv/channels (or similar), which
> isn't readable by myth user.
> I allowed read perms for /root temporarily (no secrets there anyway) and
> the delays are GONE!
> Nice one, thank you Michael. :)
> --
> David Kubicek
> _______________________________________________

Cool, that was my next suggestion for you based on a problem years back with
gif icons, happily beaten to it!  Just out of intrest I have always used
(Radio Times) XMLTV with 14 days advance guide and have in excess of 2 years
of data with no noticeable slowdown.
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