/me again...
It seems there is a problem with host checks on my box that causes host
checks to be run continuously on the same host(s) - well it seems that
there is indeed no host check run because one is < always > executing (
? no, it's not ! ).
logs show this for a debug run of just a few seconds :
# grep "A check of this host is already being executed"
/var/log/nagios/nagios.debug | wc -l
1709
de-activating host checks (execute_host_checks=0)in the nagios.cfg file
frees the CPU, at the cost of host checks... it's good to know, isn't it
? ;)
Is this really usefull anyway if I define a check_ping service on all
hosts ?
Cheers
________________________________
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of SCHAER
Frederic
Sent: Monday, September 10, 2007 12:25 PM
To: [email protected]
Subject: Re: [Nagios-users] nagios 3.0b3 abnormal cpu load ?
Hi again,
There is a difference between the nagios I compiled on the 2.4 kernel /
RHEL3 box on the one hand, and the 2.6 one on Ubuntu on the other hand :
when stracing the nagios process, I can see it's calling the nanosleep()
function - and it then sleeps -, whereas on the 2.4 box I can't see such
a call : I just see this kind of thing (and lots of these) :
gettimeofday({1189419621, 161574}, NULL) = 0
time([1189419621]) = 1189419621
time([1189419621]) = 1189419621
gettimeofday({1189419621, 183742}, NULL) = 0
gettimeofday({1189419621, 183780}, NULL) = 0
gettimeofday({1189419621, 183814}, NULL) = 0
time([1189419621]) = 1189419621
gettimeofday({1189419621, 184172}, NULL) = 0
gettimeofday({1189419621, 184326}, NULL) = 0
time([1189419621]) = 1189419621
time([1189419621]) = 1189419621
gettimeofday({1189419621, 184734}, NULL) = 0
gettimeofday({1189419621, 184861}, NULL) = 0
gettimeofday({1189419621, 184984}, NULL) = 0
time([1189419621]) = 1189419621
gettimeofday({1189419621, 185537}, NULL) = 0
gettimeofday({1189419621, 185734}, NULL) = 0
Bad thing is that I tried to configure with and without the
-enable-nanosleep or -disable-nanosleep switches, but this apparently
has no effect :'(.
So it seems nagios is sleeping all the time, eating the CPU... I'm still
trying to see if I can find a way to compile with a "working sleep".
Fred
________________________________
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of SCHAER
Frederic
Sent: Friday, September 07, 2007 5:51 PM
To: [email protected]
Subject: [Nagios-users] nagios 3.0b3 abnormal cpu load ?
Hi,
I'm trying to setup a nagios 3.0b3 server, and I configured it with only
one host, one check (ping).
I can successfully start nagios, but I have concerns about the server
cpu load : that's around 99% cpu usage all the time, on a P4 3GHz
machine...
Is there something I could do to decrese this load ? I tried installing
a nagios 2.9 server using the same configuration, and the load caused by
nagios is just ... 0.
I guess this is a bug in the beta 3 ?
Increasing the sleep time in nagios.cfg does not help at all even if I
put sleep_time=2500 (2500 seconds !)
Any suggestions would be welcome :-)
P.S : I compiled nagios on a 2.4.21 linux kernel, using gcc 3.2.3, don't
know if this could help. I don't see many usefull things with maximum
debug verbosity...
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