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From Robert Coli <rc...@eventbrite.com>
Subject Re: Cassandra 2.2.1 on Windows
Date Wed, 28 Oct 2015 18:18:26 GMT
On Tue, Oct 27, 2015 at 8:47 PM, Alaa Zubaidi (PDF) <alaa.zubaidi@pdf.com>
wrote:

> We have Cassandra 2.2.1 on Windows 2008R2-64-bit.
>
> We are noticing that during compaction Cassandra consumes all the
> available memory for the VM and bring the VM to a crawl. compaction
> settings are default, and we are using sized tiered compaction.
>
> When investigating this, we find through VMMAP that the memory is consumed
> by mapped files.
> These are almost all the sstables (index and data) for all keyspaces,
> mapped into memory (system and user defined keyspaces) .
>
> Is this normal, or should these files not be mapped into memroy after
> compaction?
>

https://wiki.apache.org/cassandra/FAQ#mmap

However that is probably not really your problem, you probably just have
too small of a heap if GC is failing?

=Rob

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