Julien, it seems that kernels 2.6.18 to 2.6.21 have some serios issues with heavy disk io especially when multiple processes are fighting over io and if read and write are going on in parallel ...
for us the upgrade to 2.6.22 helped a lot ... there were changes to the io schedulers and massive changes to the default values of the /proc/sys/vm/dirty_* tunables ... we also found that the problems were more pronounced when using lvm ... unfortunately this is all anecdotal and non conclusive. so if you have the chance, you might want to try 2.6.22 ... cheers tobi -- Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten http://it.oetiker.ch [EMAIL PROTECTED] ++41 62 213 9902 -- Heavy Disk I/O harms desktop responsiveness https://bugs.launchpad.net/bugs/131094 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
