How to increase the number of threads created by the NFS daemon in RHEL 4, 5, 6 and 7?

Solution Verified - Updated -


  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7 (deprecated)
  • NFS


  • In case of a NFS server with a high load, it may be advisable to increase the number of the threads created during the nfsd server start up.
  • How to increase the threads created by nfs daemon in Red Hat Enterprise Linux?
  • nfs thread count / nfsd thread count


Edit the following line in /etc/sysconfig/nfs


RPCNFSDCOUNT is the number of threads that will be started. Increase this to start more threads.

Note: this method is deprecated in RHEL 7. The preferred method is to set 'threads' in /etc/nfs.conf. RHEL 8 will not support /etc/sysconfig/nfs.

/etc/sysconfig/nfs: RHEL 7 (deprecated)
/etc/nfs.conf: RHEL 7, RHEL 8

Diagnostic Steps

To check if there are enough threads started, execute the following command:

cat /proc/net/rpc/nfsd

Review the following line:

th 16 0 2.610 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000

The first number is the total number of NFS server threads started. The second number indicates whether at any time all of the threads were running at once. The remaining numbers are a thread count time histogram.

You may use a script similar to the following to monitor thread usage over time:

while :
    grep "^th" /proc/net/rpc/nfsd
    sleep 300

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Edit the following line in /etc/rc.d/init.d/nfs

Don't edit the init script.  Modify the nfs sysconfig file in /etc/sysconfig/nfs, by uncommenting (remove the leading #) and changing the count as desired.

$ grep COUNT /etc/sysconfig/nfs


Ok. so what for RHEL6 admins who see "kernel: nfsd: too many open connections, consider increasing the number of threads"? Is there a way to set the number of NFSd's ? Just up the number untill this is not seen?