Re: [gentoo-user] Debug memory leaks in X server

[Mick]

On Monday 26 Nov 2012 12:43:38 Dale wrote:
> Mick wrote:
> > On Monday 26 Nov 2012 09:56:27 Florian Philipp wrote:
> >> Hi list!
> >>
> >> I have a suspicion that viewing certain PDFs in okular causes X server
> >> to leak memory. Currently it is using 1.8 GB after 3 days uptime. Has
> >> anyone else observed that? Is there a way to inspect X server's memory
> >> usage?
> >
> > I have noticed that okular recently started breaking into a sweat when it
> > renders pdf files.  Even a four page document with a bit of colour and
> >
> > graphics seems to push the cpu:
> >   PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
> >
> > 16387 michael   23   3  466m  52m  30m S  102  1.3   0:36.88
> > /usr/bin/okular <<< SNIP >>>
> >
> > Once rendered, the CPU goes down to normal levels.  The problem does not
> > seem to occur when the pdf is just text, i.e. no photographs, or complex
> > graphics in it.
> >
> > Other than the various top apps, perhaps you can try lsof?
>
> I have a local grocery store that I have to go to the website to get
> their sale ads.  Anyway, it is generally 2 pages and even on this 4 core
> rig with more than plenty of ram, it takes a bit to open them.  Funny
> thing is, I have some that is about sewing, lots of pictures in those
> since I need pics to get the idea, anyway, they load up in a flash.  As
> soon as Okular loads, the pages are there.
>
> Since this is more like what Florian describes, I guess we see the same
> things.  I'm not sure about ram itself but some files do open
> differently.  By the way, the grocery ad is a much smaller file than the
> sewing files.  Both in file size and number of pages.  One would expect
> it to be the opposite.
>
> Looks like I have a problem that I didn't know I had.  With 16Gbs of
> ram, I hadn't noticed anything with the ram, other than Seamonkey being
> its usual hoggy self.  :/   I guess this is to sort of confirm that
> someone else sees a similar thing to Florian.

This is not a RAM issue, but seemingly a CPU issue.  Furthermore, it does not 
seem to be related exclusively to okular.  I just tried qpdfview and it also 
took ages to open/render - HOWEVER - when I tried mupdf it was rendered in 
milliseconds and the CPU usage stayed very very low.  This may be something to 
do with the wonderful KDE and friends.

I recently upgraded to KDE-4.9.3 and this is not the only thing I noticed. In 
Kmail-1.13.7 all sent messages are saved in the local/sent-mail directory, 
irrespective of the path I enter in Kmail's settings for each email account.  
Initially I though that sent messages were being lost - not sent - but then I 
noticed that the default sent folder started getting larger.

I better start another thread for this problem.
-- 
Regards,
Mick