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FAQ Database : Nagios : Troubleshooting

Title:"Service Check Timed Out" errors with Solaris
FAQ ID:F0408
Submitted By:Darko Longin 
Last Updated:05/09/2007

Description:When using Nagios to monitor Solaris server, you might receive "Service Check Timed Out" errors when the (Solaris) server load increases. 

Solution:

I\'ve found that when timeouts are increased in both (or either) main config or check command, we still get \"Service Check Timed Out\" errors through nagios. The way we fixed it was by doing:

ndd -set /dev/tcp tcp_time_wait_interval 60000
ndd -set /dev/tcp tcp_conn_req_max_q 2048
ndd -set /dev/tcp tcp_conn_req_max_q0 2048
ndd -set /dev/tcp tcp_ip_abort_cinterval 60000

...on solaris. I\'m sure other OS\'s will be much the same. The servers get \"swamped\" and I\'ve come across people with similar problems when using search engines. 


Keywords:solaris service check timed out