Is there a quick and easy way to check if my node is running in compressed oop?

version 7.15.3

There should be a log entry on startup pointing this out I believe.

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So no api for run time query?
The cluster has been running for more than 1 year.

I am not aware of any API that show this.

You can use the _nodes API for it.

GET _nodes/jvm?pretty

This will return information about the jvm on all nodes, one of the fields in the response is this:

"using_compressed_ordinary_object_pointers": "true"

If you want to check just a specific node you can pass it in the API.

GET _nodes/node-name-or-node-id/jvm?pretty
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cool, thanks.
That works.

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