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From "Giampaolo (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-11516) Make max number of streams configurable
Date Thu, 16 Jun 2016 13:13:05 GMT


Giampaolo commented on CASSANDRA-11516:

I'm studying how to solve this issue. A quick question: do you mean to put a configuration
for [this line|]
using {{newFixedThreadPool}} and defaulting to {{FBUtilities#getAvailableProcessors}}?

> Make max number of streams configurable
> ---------------------------------------
>                 Key: CASSANDRA-11516
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Sebastian Estevez
>              Labels: lhf
> Today we default to num cores. In large boxes (many cores), this is suboptimal as it
can generate huge amounts of garbage that GC can't keep up with.
> Usually we tackle issues like this with the streaming throughput levers but in this case
the problem is CPU consumption by StreamReceiverTasks specifically in the IntervalTree build
> We need a max number of parallel streams lever to hanlde this.

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