Nagios check_ping times

[Reg]

I sporadically ( 1 or 2 times/day for 50 hosts) get check_ping returing 
average response times of 500ms plus resulting in false "critical" 
alerts from Nagios.  E.G.
PING CRITICAL - Packet loss = 0%, RTA = 535.87 ms

I'm running Suse 9.1 on VMWare ESX server.  I DO NOT believe vmware to 
be a factor because I also run smokeping on this virtual machine.  
SmokePing sends 3 pings every 5 seconds to the same hosts and never 
shows the 500ms+ latency that Nagios reports.  During the course of a 
typical day I get 80-100 of these "false alarms"
I suspect the problem is in the nagios daemon and how i have it 
configured.  When i run check_ping manually i can't reproduce the 
500ms+.  Are there any quick tests or diagnostics to help figure what's 
going on?

Reg


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