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That seems to be the case in Oracle Java at least. With 80+ GB heaps, you can experience multi-minute stop-the-world collections when a full GC strikes. Luckily, that can be tuned to be very rare (for the usual load).

For better latency without such hiccups, the only solution I know of is Azul's Zing (http://www.azulsystems.com/zing/pgc) which really did away with larger pauses at least with our software.

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What is "the usual load"?

Interesting; I'll check out the Azul one. I'm a little skeptical, but it might be an improvement. Did you see better throughput or just reduced latency?

By usual I mean what our application was tuned for.

Which, sadly, may or may not be what it encounters. There are still some usage patterns that can cause large amount of time being spent doing gc (without Zing).

Latency was greatly reduced, I cannot really say about throughput (except that it was not clearly worse at least).

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