NFSv4 idmapd memory consumption problem
pierre_stephane.baton at alcatelaleniaspace.com
pierre_stephane.baton at alcatelaleniaspace.com
Wed Aug 30 11:30:40 UTC 2006
Hello everybody.
I have a little problem with NFSv4 : The NFSv4 ID <-> Name Mapper daemon
(rpc.idmapd) uses lots of memory but I don't use nfsv4 mounts, only simple
nfs mounts :
Client nfs v3:
null getattr setattr lookup access
readlink
0 0% 6022199 41% 69694 0% 1234880 8% 2722353
18% 1604 0%
read write create mkdir symlink
mknod
802231 5% 2706720 18% 155868 1% 13 0% 3 0%
0 0%
remove rmdir rename link readdir readdirplus
786 0% 0 0% 611 0% 0 0% 48 0%
8780 0%
fsstat fsinfo pathconf commit
6036 0% 392796 2% 0 0% 294568 2%
This is the rpc.idmapd memory usage (8 Go installed) :
PID USER PR NI VIRT RES SHR S %CPU %MEM
TIME+ COMMAND
1825 root 16 0 2075m 1.1g 868 S 0.0
14.2 2:08.36 rpc.idmapd
This service isn't even configured :
# cat /etc/idmapd.conf
[General]
Verbosity = 0
Pipefs-Directory = /var/lib/nfs/rpc_pipefs
Domain = localdomain
[Mapping]
Nobody-User = nobody
Nobody-Group = nobody
[Translation]
Method = nsswitch
There's a lot of directories in /var/lib/nfs/rpc_pipefs :
clnt0 clnt5f0f9 clnt5fe46 clnt5fe4c clnt5fe52 clnt5fe58 clnt5fe88
clnt5fe8e clnt5fe94 clnt5fe9a
clnt2ba1d clnt5fe41 clnt5fe47 clnt5fe4d clnt5fe53 clnt5fe59 clnt5fe89
clnt5fe8f clnt5fe95 clntad8e
clnt2fccb clnt5fe42 clnt5fe48 clnt5fe4e clnt5fe54 clnt5fe5a clnt5fe8a
clnt5fe90 clnt5fe96 clntad95
clnt5aaa6 clnt5fe43 clnt5fe49 clnt5fe4f clnt5fe55 clnt5fe5b clnt5fe8b
clnt5fe91 clnt5fe97 clntad97
clnt5f029 clnt5fe44 clnt5fe4a clnt5fe50 clnt5fe56 clnt5fe86 clnt5fe8c
clnt5fe92 clnt5fe98 clntb2a8
clnt5f045 clnt5fe45 clnt5fe4b clnt5fe51 clnt5fe57 clnt5fe87 clnt5fe8d
clnt5fe93 clnt5fe99 clntb2c7
each has a single empty file in :
/var/lib/nfs/rpc_pipefs/nfs/clnt5feb5:
total 0
-r-------- 1 root root 0 Aug 30 13:23 info
/var/lib/nfs/rpc_pipefs/nfs/clntad8e:
total 0
-r-------- 1 root root 0 Aug 16 13:33 info
I should do a /etc/init.d/rpcidmapd stop, which would stop nfs server, as
I have no exported fs, this should be ok, but the different fs mounted
with autofs (Clearcase again...) should be very desapointed...
So, is there a way to reset idmapd memory usage?
A way to stop the service within autofs and fstab mounted security?
Of course I can't reboot the workstations until next planned reboot..
Any idea to get back this giga?
Thanks
________________________________
Pierre-Stéphane BATON
DI - OI/IT
Consultant Trasys-OSI
Support informatique Unix/Linux
E01-H14-L44 - Tel :+32 (0)71 442797
Alcatel Alenia Space ETCA (DI/SYS)
Rue Chapelle BEAUSSART, 101
B-6032 Mont-sur-Marchienne
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