xinetd limits ?

[Michael J McCafferty <mike@xxxxxxxxxxxxxxxxxxxxxx>]

All,

    I have a few systems that are using xinetd for various things. One is an
IMAP mail server, another is a Nagios server that is accepting check 
results from
other Nagios servers (distributed Nagios servers).
    I have had the following messages in my messages file:

Jun 16 09:05:03 mail xinetd[2108]: Deactivating service imap due to excessive
incoming connections.  Restarting in 30 seconds.
Jun 16 09:05:33 mail xinetd[2108]: Activating service imap
Jun 16 09:41:11 mail xinetd[2108]: Deactivating service imap due to excessive
incoming connections.  Restarting in 30 seconds.
Jun 16 09:41:41 mail xinetd[2108]: Activating service imap

    I have adjusted the number of connections in xinetd.conf and solved the
problem. What I want to know is the practical limit on the number of
connections for xinetd. The default in the system (RHEL3) was 60 instances,
with 25 connections per second. But, that seems awfully low.
    I am trying to gauge the scalability of the systems while using xinetd. I
will investigate using the daemon to listen directly without xinetd. But in the
meantime, what is the practical limit and factors that affect that limit, for
xinetd ?

Your thoughts ?

Thanks,
Mike
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