In IIB documentation says:
'

The key indicators of a successful JVM heap setting are:

• GC overhead - the percentage of time spent in stop-the-world GC versus the time spent running the application
• GC pause times - the length of the stop-the-world GC cycles'

In the Resource statistics I can get
<resourceIdentifier name="Garbage Collection - J9 GC" CumulativeGCTimeInSeconds="0" CumulativeNumberOfGCCollections="32"/> 

So IIB statistics do not give me the metrics I need 'percentage of time doing gc' and 'gc pause time'.
If the IIB jvm was a WebSphere Application Server (WAS) I could use jvm parameters to enable the verbose of gc and get a file with the gc statistics that I would format with a tool GCMV to get that values. 
Since the IIB jvm is not a WAS, is it possible to get the same results, I mean enable verbose gc in IIB jvm?

------------------------------
Joao Alexandre
------------------------------

Hi Joao,  Does the mqsichangeproperties ${IIB_NODE_NAME} -b agent -n jvmVerboseOption -o ComIbmJVMManager -v gc work for you?

https://www.ibm.com/docs/en/integration-bus/10.0?topic=command-jvm-parameter-values

Regards,

Jim

------------------------------
Jim Eberwein
------------------------------

Original Message:
Sent: Tue January 17, 2023 03:46 PM
From: Joao Alexandre
Subject: IIB garbage collection monitoring

In IIB documentation says:
'

The key indicators of a successful JVM heap setting are:

• GC overhead - the percentage of time spent in stop-the-world GC versus the time spent running the application
• GC pause times - the length of the stop-the-world GC cycles'

In the Resource statistics I can get
<resourceIdentifier name="Garbage Collection - J9 GC" CumulativeGCTimeInSeconds="0" CumulativeNumberOfGCCollections="32"/> 

So IIB statistics do not give me the metrics I need 'percentage of time doing gc' and 'gc pause time'.
If the IIB jvm was a WebSphere Application Server (WAS) I could use jvm parameters to enable the verbose of gc and get a file with the gc statistics that I would format with a tool GCMV to get that values. 
Since the IIB jvm is not a WAS, is it possible to get the same results, I mean enable verbose gc in IIB jvm?

------------------------------
Joao Alexandre
------------------------------