CMK version: Enterprise 2.1.0p38 OS version: Ubuntu 20.04 (the deployed mk_jolokia agent is also 2.1.0p38 / Java is v 17) I am working with an inherited Check_MK installation. The mk_jolokia data for JVM GC PS MarkSweep shows a baseline metric of 200 - 500%. When a JVM goes into cycles of full G…

I’ve spend a bit more time on it, and i was wrong in interpretation on code. There a still a bug in checkMk, but it’s a absolute value what they do they calculate a rate for connection_time, express in ms/sec and convert in percent by *10, what is wrong 250ms/sec should be 25%, not 2500% as it c…

Yes i got the same. As i understand code, it not a absolute value, but a rate. i understand like that Garbage collections: 0.01/s mean that it does 0.01 GC collector/s more than last period (60s) Time spent collecting garbage: 2.12 % mean it increase time in GC of 2.12% comparing to last period…

Thank you. Your confirmation confirms that I’m not completely crazy.

i’ve just done a pull request for it Allow percentage to be higher than 100% on jvm_gc for time spent Checkmk:master ← belese:master opened 02:12PM - 21 May 24 UTC (UTC) …

Is this working for you? I had already tried changing this (I went with / 10 rather than * 0.1) and it seemed to have no impact at all on the metrics reported, neither in the status message nor in the RRD graphs.

Yes it’s working, i’ve to put in local/share/check_mk/checks/jolokia_jvm_garbagecollectors restart checkMk. i use a distributed system, it wouldn’t activate by default on all site, i’ve to force a activate on all site by editing a user as workaround

I had already tried the same thing (apart from using / 10.0 rather than * 0.10) hence my reason for asking, I suspect there may be something wrong with how I deployed this: First attempt created a backup of var/check_mk/precompiled_checks/builtin/jolokia_jvm_garbagecollectors in the same dir (jol…

The best instance talking about that so far is here: [image] Editing pre built plugins in CheckMK Troubleshooting CMK version: 2.1 OS version: RHEL8 Hi, I want to make a change to the following python script /omd/sites/global/lib/python3/cmk/base/plugins/agent_based/ku…

you don’t need to delete the original in var/… What you put in local overirde the default checkmk one, it seem to work for quite all plugin i overrided (service now, python and gc_collector) Otherwise, i mostly read the code for the documentation.

This is now fixed in last version 17111 FIX JVM garbage collectors: Collection time off by factor of 100 committed 06:23AM - 25 Jun 24 UTC (UTC) [belese] belese …

Weird values for GC PS Marksweep / time collecting garbage

Troubleshooting

briand (Brian) May 29, 2024, 7:05pm 9

The best instance talking about that so far is here:

I do think that there is something more official, but I can not able to find it yet.