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NFSd command utilizing more cpu

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Old Unix and Linux 08-19-2016
Maddy123 Maddy123 is offline
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NFSd command utilizing more cpu

Hi,

I see following 'nfsd' command is using more CPU. Could someone please comment on it's pros and cons of it?


Code:
CPU TTY  PID USERNAME PRI NI   SIZE    RES STATE    TIME %WCPU  %CPU COMMAND
 5   ? 16890 root     152 20 34696K 12036K run   57166:48 856.13 854.64 nfsd

OS -- HP-UX
One database is running in the server.

Regards,
Maddy
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Old Unix and Linux 08-24-2016
MadeInGermany MadeInGermany is offline Forum Advisor  
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Is your server an NFS server?
Normally nfsd is the name of the NFS daemon.
The NFS clients can stress it, then it consumes more CPU.
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Old Unix and Linux 08-26-2016
Maddy123 Maddy123 is offline
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Hi,

Yes this is NFS server.

Regards,
Maddy
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Old Unix and Linux 08-26-2016
MadeInGermany MadeInGermany is offline Forum Advisor  
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The reason why nfsd consumes 850% CPU is that measurement is per CPU core, and it currently uses more than 8 CPU cores. It does that by running more than 8 threads (LWPs).
Unfortunately the HP-UX ps command does not show the process threads (where Linux and Solaris have the -L option for ps).
You can see the NFS statistics:

Code:
nfsstat -ns

Further, if you have tpcdump installed, you can see which NFS client is currently accessing:

Code:
tcpdump port nfs

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