On Mon, Apr 25, 2005 at 10:27:07AM +0200, alexx wrote: > Hello, > > To begin : sorry for my poor english :( > > I've a recurent problem with vserver 0.30.204 on a bi-XeonP4 (use in > 32bits, and > with hyper threading). > Kernel is 2.6.11.5 with vs1.9.5 > The host is debian, but i've compiled vserver-util alpha myself. > > I run 2 vservers on since approximativly 1 mounth. > Vserver and host server run perfectly .. but last night, and this night, 1 > of the > 2 CPU go into 100 % 'wa' (i don't find what that mean in 'top') and the
'wa' is I/O wait ... i.e. the cpu spends most of the time waiting for some I/O transaction to complete ... > other look > like ok with 95% idle. > > The load average grow to 100 this night and 300 last night (normal load: > 0.2-0.5 > max 4) ! > > At this step, i have only one vserver down (stop responding) on the 2. > The strange thing was it's not the same vserver last night, and this night > :/ > > When the "bug" arrived, i can't do "vserver .... enter" or "vps auxw", ... > I can't enter into the directory of the vserver, ... the term freeze after > typing > [Enter] to the '$ cd /vservers/serv1' command > just vtop work, but not display any strange process :( just an enormous > load. > "vserver .... stop" freeze too after a > > All VServer are on it's own LVM partition in ReiserFS. > each partition is snapshoted a multiple of time. > > Last days modification is the add of a cron script to make new snapshot > each night > without delete the old (i want to keep 5 snapshots each time). > I umount old snapshot, and mount the new snapshot with : > "mount -o ro,noexec,nodev,noatime ..." > > The snapshot cron is at 0:30 > My backup server take data into the mounted snapshot at 1:00 > And the vserver crash no longtime after. well, I would suspect that combination of LVM, reiser and dm snapshooting to cause unusual hight I/O traffic ... > I stop this for now (just one snapshot at a time per partition). > > Any other suggestion for the origin of the problem ? check the kernel logs maybe they give some hints ... > Alexx HTH, Herbert _______________________________________________ Vserver mailing list Vserver@list.linux-vserver.org http://list.linux-vserver.org/mailman/listinfo/vserver
