Graphing via SNMP: percentagememoryusedaftergc

[billmatthews]

I'm using RTMT to graph CCX Engine JVM Heap: percentagememoryusedaftergc

Is this same counter available via SNMP?  If so, do you know the OID?  I'd like to monitor it via our SNMP graphing software rather than RTMT.

Thanks                  

[Gergely Szabo]

Hi,

I don't want to be cheeky, but what do you need this information for?

G.

[billmatthews]

We're getting frequent UnifiedCCXEngineMemoryUsageHigh alarms, and trying to trend the utilization throughout the day. We also want to be able (after we have a baseline) to analyze the impact of some changes we will be implementing.

[Anthony Holloway]

Did you find if these counters are available via SNMP?  I just use RTMT performance logging to trend these values.  Also, I don't look at the "aftergc" counter, but rather, the "max" and "used" counters.  By grabbing both of these, I can produce a nice chart which shows a ceiling, a value, and their relationship.

Just for fun, here's two different systems (the dashed lines) and how the JVM heap gets used and reclaimed throughout a four hour period of the day.  These two systems are on 8.5(1) with 256MB of JVM available to them.  Again, had I not had the "max" counter logging, you wouldn't be able to tell if this was from a 256MB or 512MB system.  Of course, if the values were floating above 256MB, you could reasonably assume the opposite.

Anthony Holloway

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