[Check_mk (english)] check_mk_agent exect times
This may or may not have any relation to OMD/Check_mk, but I thought I'd throw out the situation and see if
anyone has ideas.
At home I'm running a small OMD setup on a recent nightly build, check_mk 1.2.6p1. In the last couple of weeks
since I got things running under 1.2.6p1 I've noticed an occasional hiccup on the network which causes the
check_mk_agent execution time to hit the 30 second timeout. Pretty much all the hosts and services go
critical or unknown. It clears up after a few minutes each time but will re-appear at some random interval
later on. To try and fix this I've disabled the mk_inventory stuff and the DNS Resolve service. I was seeing
indications that it's DNS related, whenever it was in the bad state I couldn't do any DNS resolving. I run a
dnsmasq on the OMD server to resolve local names and uses Google for external lookups, and even it wouldn't
resolve a local network name that is defined on the server until the problem cleared, then it's all back to normal.
That's the graph from Check_MK check execution time over the last month, shows clearly that right around
the time I upgraded OMD to a nightly build that included check_mk 1.2.6p1 my execution times climbed
significantly. Then the last week or so they started getting a bit out of control. All the Linux boxes on the
network show the same thing, there's one Windows system it shows a significant climb in execution time
that's similar but instead of a small bump at week 18 in the graph, then a bigger bump in week 19, it's just a
big bump at week 18.
In the two hours since I disabled the two services I suspect there's been no hiccups. Not definitive yet by
any means but it's got me suspicious that I'm at least on the right track so far.
My setup at home has 39 hosts and 645 services. At work I have 510 hosts, 21,332 services spread across 1
primary server and 7 secondary servers, one for each subnet and I see a small bump in exec times but nothing
like I'm seeing at home. And I dont' see any problems like this on the work network.
Anyone see anything similar with their setup?
checkmk-en mailing list
We値l meet in Munich for the 2nd Check_MK Conference!
Book your place now and be part of it.
October 18th-20th, 2015