Check manual page of nfsmounts
Health of NFS mounts
This check probes the availability of NFS mounts. The Linux agent sends the
status of all NFS mounts, if the command line utility waitmax is available
(it is is used to avoid hanging if the NFS server is not responding). The
probe is done by trying a stat -f (system call statfs(2)) on the mount
point. If that lasts longer then 2 seconds, then the server is considered
to be not responding.
When you install the Linux agent manually, please do not forget to also
install waitmax into /usr/bin. That file is shipped together with
the agent. When waitmax is missing, the agent will silently omit the
If the NFS mount is "stale", then stat -f returns immediately but with
a size of -1. The check detects that and results in a warning state.
Please note, that though this check outputs the current usage of the remote
filesystem, no levels can be defined for the used space and no performance
data is output. Please do a check for used space directly on the NFS server.
The mount point.
All NFS mounts are found automatically. This is done
by scanning /proc/mounts. The file /etc/fstab