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Sebastian Estevez commented on CASSANDRA-8787:
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Thanks yep I saw Jonathan's post on the other ticket. Makes sense.
> Decrease Default concurrent_compactors from number of CPU
> ---------------------------------------------------------
>
> Key: CASSANDRA-8787
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8787
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Sebastian Estevez
> Priority: Minor
> Fix For: 3.0
>
>
> Currently we default concurrent_compactors to the number of avaliable CPUs
> which means compactions can theoretically take over all threads and prevent
> reads and writes from happening.
> I'm currently seeing an extreme case of this that is caused by
> [6405|https://issues.apache.org/jira/browse/CASSANDRA-6405]. But, in general,
> this is a bad default. We should probably default concurrent_compactors to
> num_cpu to cores/2 or even cores/4.
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