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From Elliott Sims <elli...@backblaze.com>
Subject Re: Multiple compactions to same disk with 3.11.4
Date Tue, 01 Oct 2019 21:16:34 GMT
There's a concurrent_compactors parameter in cassandra.yml that does
exactly what the name says.  You may also find
compaction_throughput_mb_per_sec useful.

On Tue, Oct 1, 2019 at 8:16 AM Matthias Pfau <matthias.pfau@tutao.de.invalid>
wrote:

> Hi there,
> we recently upgraded from 2.2 to 3.11.4.
>
> Unfortunately, we are running into problems with the compaction
> scheduling, now. From time to time, a bunch of compactions (e.g. 6) are
> scheduled for the same data dir. This makes no sense for spinning disks as
> it will slow down all compactions and other operations like flushes
> dramatically.
>
> Has someone else experienced this problem? If so, how did you workaround
> this? Do you know of an open issue regarding this?
>
> Thanks!
>
> Best,
> Matthias
>
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