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From Chris Lohfink <>
Subject Re: Java GC pauses, reality check
Date Fri, 25 Nov 2016 21:41:19 GMT
No tuning will eliminate gcs.

20-30 seconds is horrific and out of the ordinary. Most likely implementing
antipatterns and/or poorly configured. Sub 1s is realistic but with some
workloads still may require some tuning to maintain. Some workloads are
very unfriendly to GCs though (ie heavy tombstones, very wide partitions).


On Fri, Nov 25, 2016 at 3:25 PM, S Ahmed <> wrote:

> Hello!
> From what I understand java GC pauses are pretty much a fact of life, but
> you can tune the jvm to reduce the likelihood of the frequency and length
> of GC pauses.
> When using Cassandra, how frequent or long have these pauses known to be?
> Even with tuning, is it safe to assume they cannot be eliminated?
> Would a 20-30 second pause be something out of the ordinary?
> Thanks.

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