memory usage
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Hi,
this may not strictly be about (just) KDE, but I'm experiencing really
excessive swapping activity on my laptop since a little while back. The most
recent major change is the upgrade to KDE 4.4.3. I had all the previous KDE
4 versions in Debian, and my feeling is that I had less problems earlier,
but it's hard to tell.
Anyway, the system is a Thinkpad T61 with 4 GB of RAM, kernel 3.6.33.2,
Intel graphics, X.org and KDE from sid.
Obviously KDE is not by itself eating all that RAM. The main memory hog is
Eclipse which I use for development, and with the right plugins installed it
really does require lots of memory. Still, I think I should be allowed to
use one big application like this without killing performance. (Or maybe 4
GB is just not enough for a development machine these days?)
The system will often grind to a halt for several minutes while iotop shows
that it is busy swapping, usually swapping in the Eclipse process. The most
annoying thing is that KDE becomes totally unresponsive during all this
time, I cannot even move the mouse pointer.
I realise this is a complex problem, but maybe someone has hints on how to
improve the situation. Could it be a problem with hard drive performance? Or
did KDE recently start hogging more RAM? Any ideas where to look? This is
getting in the way of productivity, so something has to be done.
Here is "top" output for the biggest memory sinks:
14779 marcus 20 0 2445m 1.3g 5808 S 1 34.5 15:33.26 java
14017 root 20 0 1363m 164m 9668 S 11 4.2 1554:02 Xorg
14203 marcus 20 0 728m 141m 6344 S 4 3.7 542:25.08 kwin
29998 marcus 20 0 789m 102m 11m S 0 2.7 3:23.73 icedove-bin
18782 marcus 20 0 459m 99m 4572 S 0 2.6 13:44.35 emacs
14210 marcus 20 0 978m 97m 10m S 0 2.5 129:12.74 plasma-desktop
17609 marcus 20 0 531m 44m 11m S 0 1.2 13:30.99 chrome
26921 marcus 20 0 203m 38m 784 S 0 1.0 36:15.53 skype
32352 marcus 20 0 616m 31m 6924 D 3 0.8 4:47.04 akregator
14281 marcus 20 0 360m 27m 5920 S 2 0.7 16:34.45 konsole
14328 marcus 20 0 722m 27m 7404 S 0 0.7 10:24.57 kopete
31194 marcus 20 0 1249m 22m 6076 S 0 0.6 20:52.24 amarok
18826 marcus 20 0 458m 18m 3216 S 1 0.5 26:26.25 chrome
18798 marcus 20 0 795m 17m 4448 S 0 0.5 1:33.26 chrome
10175 marcus 20 0 931m 15m 3268 S 0 0.4 1:12.29 krunner
14146 marcus 20 0 510m 15m 3960 S 0 0.4 7:45.33 kded4
20516 marcus 20 0 534m 15m 2540 S 0 0.4 0:33.32 knode
Well, this really points to Eclipse (the "java" process), but still 1.3 GB
is not even half of available RAM.
Cheers,
Marcus
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