Swapped memory limited to about 500MB for a process ?
canevet at embl.fr
Wed Sep 12 14:05:08 UTC 2012
On Wed, 2012-09-12 at 10:03 -0400, Lowell Gilbert wrote:
> Mickaël Canévet <canevet at embl.fr> writes:
> > On Tue, 2012-09-11 at 13:05 -0400, Lowell Gilbert wrote:
> >> Mickaël Canévet <canevet at embl.fr> writes:
> >> > I was impacted by a memory leak that has been fixed by this patch:
> >> > http://people.freebsd.org/~rmacklem/namei-leak.patch
> >> >
> >> > What I noticed when the server was paging is that it seems that only
> >> > about 500MB of my 4GB swap partition was used before crashing. I was
> >> > wondering why it didn't take the whole 4GB up to the crash of the server
> >> > because of lake of memory (that would let me more time to react).
> >> >
> >> > Is there such king of setting that prevent a process to put more then
> >> > 500MB of data in swap ?
> >> limits(1)?
> > Thank you for your answer.
> > Here is the result of limits:
> > limits
> > Resource limits (current):
> > cputime infinity secs
> > filesize infinity kB
> > datasize 33554432 kB
> > stacksize 524288 kB
> > coredumpsize infinity kB
> > memoryuse infinity kB
> > memorylocked infinity kB
> > maxprocesses 5547
> > openfiles 11095
> > sbsize infinity bytes
> > vmemoryuse infinity kB
> > pseudo-terminals infinity
> > swapuse infinity kB
> > swapuse is set to unlimited, but stacksize is set to 512MB.
> > Is it the stacksize setting that prevent my kernel to swap more then
> > 512MB ?
> No, I don't think so. datasize was the parameter I was most
> suspecting; and it assumes that a particular process was causing the
> crash (which is unlikely; the OS is supposed to protect you against
> Most likely, the crash was not directly caused by a shortage of virtual
> memory. You would have to diagnose through crash dumps, but it could be
> that some more specific resource was exhausted. Or perhaps the memory
> leak left dangling references in a vnode.
Thanks a lot for your explanations.
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