Increasing max_pluginoutput_length

[Subhendu Ghosh]

On Mon, 18 Jul 2005, Peter Kostik wrote:

> Hello all,
>
> by saying what an incredibly superior product Nagios
> is, I will be probably repeating hundreds of others
> that use it and love it, so let me get to the point.
>
> I am running 2.0b3 to monitor thousands of services on
> hundreds of servers, using mainly passive checks
> (nsca/send_nsca) and of course nrpe/check_nrpe to make
> sure things are running as they should.
>
> Some of my plugins return long outputs (2k) via
> send_nsca. So what I did is increase
> MAX_PLUGINOUTPUT_LENGTH in common/common.h in nsca
> addon and also in core nagios in include/objects.h. I
> believe original value was something around 300 bytes
> so I bumped it up to 2k. However, my plugin outputs
> still get truncated at around 800 bytes (don't know
> exact value of top of my head). Had anyone played
> around with changing these values and got it working
> right? I am wondering if there is another limit set
> somewhere else that overrides this.
>
> Thanks for the great product.
>
> Pete
>

There is system limit for a named pipe buffer.
check your os' limits.h for PIPE_BUF

RHEL4 defaults to 4096 characters, but linux used to have a smaller buffer 
hence the general size restriction in Nagios.

-- 
-sg


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