Good day all!
I have a nfs server handling the load for a shared file system for 5 web
servers... some relevant info:
libnfsidmap2
0.23-2
nfs-common
1:1.2.2-1ubuntu1.1
nfs-kernel-server
1:1.2.2-1ubuntu1.1
Linux webnfs 2.6.35-31-server #63-Ubuntu SMP Mon Nov 28 21:03:37 UTC
2011 x86_64 GNU/Linux
On this server everything runs great for a couple weeks to a month and
then we start getting sluggish performance... and within a couple days
it seizes up (at least all nfs services stop... console is still accessible)
In trying to debug this we have been taking a snap shot every 5 minutes
of the slabinfo... we got a totally clean capture this time and I see
nfsd4_stateowners running away with memory. When we start the server and
for the first several days the most memory it uses is 200MB or so...
over time though there come points were it suddenly starts munching
more... sometimes slowly... other times instantly. It finally kills the
machine when it reaches the 1.7-1.8 GB level (just under the memory size
of the machine). oom-killer is killing everything left and right at the
end and we end up with a machine that is comatose NFS wise till we do a
full reboot.
You can see a graph of this usage pattern at: http://imgur.com/ecLPh
I see mentions of a problem along this line back in the 2.6.16-18 types
days... but supposedly it was fixed.
Does anyone have any ideas?
--
Todd Freeman Ext 6103 .^. Don't fear the penguins!
Programming Department /V\
Andrews University // \\ http://www.linux.org/
http://www.andrews.edu/~freeman/ /( )\ http://www.debian.org/
^^ ^^
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
