On Thu, Dec 6, 2012 at 7:36 PM, aaron morton <aa...@thelastpickle.com> wrote:
> So for memory mapped files, compaction can do a madvise SEQUENTIAL instead
> of current DONTNEED flag after detecting appropriate OS versions. Will this
> help?
>
>
> AFAIK Compaction does use memory mapped file access.

The history :

https://issues.apache.org/jira/browse/CASSANDRA-1470

=Rob

-- 
=Robert Coli
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