Ton Voon wrote: > On 11 May 2007, at 20:25, Aidan Anderson wrote: > > >> First of all, thank-you for the replies! >> >> The majority of devices that I monitor are routers/vpn devices and I >> have (on the documentation's advice) not set active checks on the >> hosts >> and instead I've added check_ping as a service on each of these >> hosts to >> do 5 pings as follows: >> >> check_ping -H $HOSTADDRESS$ -w $ARG1$ -c $ARG2$ -p 5 >> >> For the host check I already use as you suggested a check_ping that >> only >> does one ping as follows: >> >> check_ping -H $HOSTADDRESS$ -w 3000.0,80% -c 5000.0,100% -p 1 >> >> My understanding was that if the service check failed it would then >> abandon the service check altogether and move onto the host check >> which >> is only 1 ping. The fact that the service checks are parallelised >> should mean that it shouldn't matter that there are 5 pings and the >> host >> check is only 1 ping which should resolve the bottleneck of serialised >> host checks. I'm at a loss as to why performance has been impacted so >> severely. >> >> Maybe I need to abandon the service checks altogether and just have a >> host check. I'm reluctant to do this because I get very useful >> information from 5 pings, ie packet loss and high rta which is >> particularly handy for checking volatile links such as ADSL. Maybe >> that >> is the trade-off, fast host checking with no useful stats or slow host >> checking with useful stats. >> > > Just noticed this in your original email: > > Host Check Execution Time: 0.03 / 10.04 / 0.843 sec > > This means that some of your host checks are taking 10 seconds, which > is, funnily enough, the timeout period for check_ping. So the -p 1 > will still take 10 seconds if the routers are not responding. > > You can use a timeout flag for check_ping (but is only supported on > some OSes). I guess check_icmp is a better bet here. > > Ton > Hi Ton,
Well spotted, thank-you. check_icmp here we come :) thanks Aidan ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null