05-02-2012
Memory problems in NFS client server
Hi all,
i have some doubts in a situation that i fail to get an answer in Google.
I have a solaris 10 nfs server and 5 centos 6.0 nfs clients.
The problem/situation is that in the clients the free memory is "disappearing" along the time (passing to used)..and it gets free if i umount the nfs mount point. I can see also that the speed that the memory is "disappearing" is related to the use of the nfs fs (3 of the 5 servers use the nfs fs more intensively and in those it disappears faster).
I m mounting with:
rw,vers=4,hard,rsize=32768,wsize=32768,noac
Kernel version:2.6.32-71.el6.x86_64 and 2.6.32-220.13.1.el6.x86_64 (i have updated in one server to check the behavior and its the same)
and:
rpm -aq | grep -i nfs
nfs-utils-1.2.2-7.el6.x86_64
nfs4-acl-tools-0.3.3-5.el6.x86_64
nfs-utils-lib-1.1.5-1.el6.x86_64
and in the updated server
nfs4-acl-tools-0.3.3-5.el6.x86_64
nfs-utils-lib-1.1.5-4.el6.x86_64
nfs-utils-1.2.3-15.el6.x86_64
By the way i m checking the memory with the free -m command in this line:
...
-/+ buffers/cache: 480 3286
...
(i did a umount/mount some time ago so now its not bad, but in couple of days it gets the opposite or worse..)
Can someone give me some lights about this behavior?
Thanks
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LEARN ABOUT SUNOS
dfmounts_nfs
dfmounts_nfs(1M) System Administration Commands dfmounts_nfs(1M)
NAME
dfmounts_nfs - display mounted NFS resource information
SYNOPSIS
dfmounts [ -F nfs] [-h] [server...]
DESCRIPTION
dfmounts shows the local resources shared through NFS, along with the list of clients that have mounted the resource. The -F flag may be
omitted if NFS is the only file system type listed in the file /etc/dfs/fstypes.
dfmounts without options, displays all remote resources mounted on the local system, regardless of file system type.
The output of dfmounts consists of an optional header line (suppressed with the -h flag) followed by a list of lines containing whitespace-
separated fields. For each resource, the fields are:
resource server pathname clients ...
where
resource Does not apply to NFS. Printed as a hyphen (-).
server Specifies the system from which the resource was mounted.
pathname Specifies the pathname that must be given to the share(1M) command.
clients Is a comma-separated list of systems that have mounted the resource.
OPTIONS
-F nfs Specifies the nfs-FSType.
-h Suppress header line in output.
server Displays information about the resources mounted from each server, where server can be any system on the network. If no
server is specified, the server is assumed to be the local system.
FILES
/etc/dfs/fstypes
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWnfscu |
+-----------------------------+-----------------------------+
SEE ALSO
mount(1M), share(1M), unshare(1M), attributes(5)
SunOS 5.10 6 Nov 2000 dfmounts_nfs(1M)