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From Jonathan Ellis <>
Subject Re: Resident size growth
Date Wed, 18 Apr 2012 18:18:47 GMT
On Wed, Apr 18, 2012 at 12:44 PM, Rob Coli <> wrote:
> On Tue, Apr 10, 2012 at 8:40 AM, ruslan usifov <> wrote:
>> mmap doesn't depend on jna
> FWIW, this confusion is as a result of the use of *mlockall*, which is
> used to prevent mmapped files from being swapped, which does depend on
> JNA.

mlockall does depend on JNA, but we only lock the JVM itself in
memory.  The OS is free to page data files in and out as needed.

Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support

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