On Mon, 2005-12-12 at 16:53 +0100, Herbert Poetzl wrote: > On Mon, Dec 12, 2005 at 03:34:13PM +0200, Roché Compaan wrote: > > On Mon, 2005-12-12 at 03:06 +0100, Herbert Poetzl wrote: > > > On Sun, Dec 11, 2005 at 10:28:04PM +0200, Roché Compaan wrote: > > > > On Sun, 2005-12-11 at 11:34 -0800, Alexander Kabanov wrote: > > > > > hi, > > > > > > > > > > i'm having similar errors (I do have limits and scheduler set, using > > > > > rlimits (as, rss, nproc) and scheduler) whenever i do stress testing, > > > > > (overloading mta or web server for example). > > > > > > > > > > during a stress test, some applications die because of no memory > > > > > available or can't fork, some stop with segmentation fault (not able > > > > > to do vserver <vs> enter),. when attacking httpd might have httpd > > > > > <defunct>. > > > > > > > > I am experiencing the same problems. The segfaults and not being able to > > > > enter a vserver from the host *really* worries me. > > > > > > well, if the limits are reached, the guest can not create > > > new processes and/or instantiate more memory ... of course > > > this might lead to program termination and the fact that > > > a guest cannot be entered (as the limits are hard limits). > > > raising them will make it all work again ... > > > > If the vserver is hitting the limit then I'm less worried because I > > can solve the problem by increasing the limit. I misread and thought > > that there was plenty of memory to spare. > > > > Would I be right in assuming that increasing only the virtual memory > > will solve the problem? > > probably that will solve 80% of the issues > (see VM vs RSS hit ratio)
Where? > > I don't mind if virtual servers use swap space if they need memory > > because we have plenty of disk space, but I don't want them to consume > > all the physical memory on the box. > > trust me, you do mind as soon as the guests start > swapping in and out ... Sorry, you'll have to explain - I don't understand how the vserver or the linux kernel manages virtual memory or what you mean when you say "swapping in and out". > > > Does setting a hard limit for RSS achieve this? > > not yet ... How will it do this in future? -- Roché Compaan Upfront Systems http://www.upfrontsystems.co.za _______________________________________________ Vserver mailing list [email protected] http://list.linux-vserver.org/mailman/listinfo/vserver
