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by gf000 405 days ago
It's a configurable property, and Java has a bunch of GCs to begin with.

Also, not using as much memory in these types of GCs is a direct hit to performance. And this actually shows splendidly on GC-heavy applications/benchmarks.
2 comments
neuroelectron 404 days ago
We were paying a million a month for a custom high performance GC for a little bit but we were able to get off that with a lot of development effort and get our five 9's latency under control.
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concerndc1tizen 405 days ago
I tried and gave up on getting Keycloak to use less memory. 500-1500 MB for a server with less than 10 concurrent users is ridiculous. And that's even using an external database.
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gf000 405 days ago
What did you try? As a last attempt you can just check visualvm to see the actual memory use, add a few percent headroom and set that as heap size.
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