Con - With swappiness set to 100, the apps do start up in 3 minutes and kswapd doesn't hog the CPU. But X is still unusable till all of them have started up. Wli - Sorry, vmstat segfaults on 2.6!
[email protected] wrote
Quoted 6 lines · On Thu, 28 Aug 2003 07:38, [email protected] wrote:
Trying out 2.6.0-test4-mm1. Inside KDE, I start OpenOffice.org, Rational Rose and Konsole at a time. All of these take extremely long time to startup. (approx > 5 minutes). Kswapd hogs the CPU all the time. X becomes unusable till all of them startup, although I can telnet and run top. Same thing run under 2.4.18 starts up in 3 minutes, X stays usable and kswapd never take more than 2% CPU.
Yes I can reproduce this with a memory heavy load as well on low memory (linking at the end of a big kernel compile is standard problem). I actually found the best workaround was to increase the swappiness instead of decreasing it.
Try
echo 100 > /proc/sys/vm/swappiness
time it
then try
echo 0 > /proc/sys/vm/swappiness
you'll see that at low swappiness kswapd0 can use ridiculous amounts of cpu trying to avoid swap. The default is 60.
Con
Re: your mail
Quoted 2 lines · On Wed, Aug 27, 2003 at 09:25:23PM -0500, [email protected] wrote:
Con - With swappiness set to 100, the apps do start up in 3 minutes and kswapd doesn't hog the CPU. But X is still unusable till all of them have started up. Wli - Sorry, vmstat segfaults on 2.6!
This is a bug in older versions of vmstat. Upgrade vmstat.
-- wli