>
> On Tue, 2002-01-15 at 13:33, Ian D. Hardy wrote:
> > Hi,
> >
> > For some time we've been having problem with a server, which is acting
> > as a master/control node and NFS server for a computational cluster
> > (~180 client nodes). The server will crash after anywhere between
> > a few hours and 10 days operation. We've tried various kernels and
> > XFS patch versions from 2.4.9 kernel with XFS patch-2.4.9-xfs-2001-08-17
> > up to and including 2.4.16 kernel with the xfs-2.4.16-all-i386 patch,
> > if anything the 2.4.9 kernel has proved the most reliable (it normally
> > lasts between 4 and 10 days! - 2.4.16 lasted less than 24hrs).
.... more details deleted
> >
>
> Almost certainly this is an out of memory condition, just from looking
> at the code in the function you oopsed in. Would you say your system is
> stressed when it comes to memory?
>
> Steve
>
> Steve Lord voice: +1-651-683-3511
> Principal Engineer, Filesystem Software email: lord@xxxxxxx
>
I'd not regard the server as short of memory as its using ~660Mbytes as
file system cache, though interestingly it does appear to be using some
swap space. Is it possible that XFS is having problems when there is not
memory immediately available, I've included some 'vmstat' output:
vmstat 10 10
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
0 1 28 11116 3784 42300 674656 0 0 37 35 19 3 0 2 23
0 1 28 11116 3480 42300 674960 0 0 0 0 167 194 0 0 100
0 1 28 11116 3176 42300 675264 0 0 0 0 139 107 0 0 100
0 1 28 11116 3056 42300 675380 0 0 0 2 152 142 0 0 100
In Irix I'd tune the kernel parameters 'min_free_pages'... to ensure that
there was always physical memory available, is there any equivalent in
Linux (sorry if this is a silly/obvious question).
Many thanks.
Ian
--
////////////////////////////////////////////////////////////////////////////
Ian Hardy Tel: 023 80593577
Research Services Fax: 023 80593131
Computing Services email: idh@xxxxxxxxxxx
Southampton University i.d.hardy@xxxxxxxxxxx
Southampton S017 1BJ, UK.
\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
|