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How is the GC Caused Suspension Time Alert triggered?

D_Miller
Helper

Hi,

Can someone explain what I'm obviously missing.

The Monitoring of Suspension time caused by Garbage Collection. The Alert rule states

"If the process spends more than 15.0% of it's execution time in Garbage Collection the process is considered unhealthy"

On a particular Web Sphere Application Process dashboard for a Websphere JVM/Clone that's drilled down to from the Monitoring Transaction Flow dashboard. I can see for a 24 hr time frame where each bar in the chart represents 15 mins that GC Caused Suspension time took 141 seconds. This is greater than 15% of 15 mins (900 seconds). But AppMon is still showing the process as healthy.

Why is this?

Thanks

1 REPLY 1

Hi Darren,

your assumption would be correct if there was only a single CPU but they are probably more than 1 therefore the execution time for a 15 minute period could be greater than 15 due to parallelism.

I would chart the overall execution time and compare again.

Regards

Flo