Is it normal that X consumes 800 MB RAM?
madman2003 at gmail.com
Fri Dec 18 01:25:48 PST 2009
On Thu, Dec 17, 2009 at 10:40 PM, Nikos Chantziaras <realnc at arcor.de> wrote:
> On 12/17/2009 10:54 PM, dolphinling wrote:
>> On 12/14/2009 04:44 PM, Nikos Chantziaras wrote:
>>> The longer the system runs, the more RAM X eats. After about 5 hours of
>>> uptime, I get this:
>>> That's about 800MB memory usage. It gets worse as time passes. Is this
>>> normal? This looks like some memory leak to me. Does the graphics
>>> driver play a role here? I'm using AMD's binary blob for ATI cards (the
>>> "radeon" driver doesn't support my card.) Anything else that might be
>>> going on?
>>> This is on a Gentoo AMD64 system with X server 1.6.5, AMD Catalyst 9.11
>>> drivers and kernel 18.104.22.168. DE is KDE 4.3.4 (in case it matters.)
>> Typically high memory usage of X is caused by other programs asking X to store
>> things for them. You can use the xrestop program to see how much is being used
>> for each program.
>> This problem may be because some other program is never telling X that it's done
>> with resources. xrestop should be able to tell you which program it is.
>> Of course theoretically it's possible there's a leak in one of the X components
>> (especially the binary graphics driver), but this is far more common.
> This seemed to be the result of using a KDE 4.3 built against Qt 4.6
> (this is not officially supported by KDE). I've since downgraded to Qt
> 4.5 and rebuilt KDE. This seems to have fixed the issue (mostly).
> X still uses more and more memory as uptime goes up, but not as dramatic
> as reaching 800MB after 5 hours. At boot-up, X starts with about 60MB
> of memory usage. Right now, after about 3 hours, it's at 170MB and
> slightly increasing with time. xrestop doesn't show anything
> interesting: adding up all the "Total" values reported only amounts to
> about 20MB or memory. Where the missing 90MB are spent, I've no idea.
> But in any case, we're now talking about 90MB unaccounted for instead of
> 700MB previously.
> xorg mailing list
> xorg at lists.freedesktop.org
Have you considered running valgrind for a little while, because it is
possible there is a real memory leak somewhere. One hint, xorg is a
suid binary (runs as root), so you probably want to make a copy of it
and let valgrind run on that.
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