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Any Measure That Able to Provide A Picture of How Fragmented the Heap is?

The title of the question pretty much says it all. (btw, its a Hotspot JVM)

I am troubleshooting memory issue, and suspect that the Old Gen is too fragmented to allocate large memory chunk and thus, throw a OOM. (Since there are many times in chart that I see the memory usage is higher and yet no OOM)

If there's no such metric, any workaround or any other way I can possible achive this or see how fragmented the heap gets?

2 REPLIES 2

dave_mauney
Dynatrace Champion
Dynatrace Champion

Hi Wai,

I don't think we have any measure or way to give any insight into memory fragmentation.

Sorry,

dave

Okay thanks.