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From Jonathan Ellis <>
Subject Re: memory_locking_policy parameter in cassandra.yaml for disabling swap - has this variable been renamed?
Date Fri, 29 Jul 2011 17:33:07 GMT
On Fri, Jul 29, 2011 at 4:35 AM, Terje Marthinussen
<> wrote:
> "What is the origin of the mmap
> is substantially faster" claim?

The origin is the performance testing we did when adding mmap'd i/o.

I believe Chris Goffinet also found a double-digit percentage
performance improvement at Digg and/or Twitter, but I don't remember
the details.

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

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