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From Viktor Jevdokimov <>
Subject RE: Cassandra 1.x and proper JNA setup
Date Wed, 02 Nov 2011 12:34:37 GMT
Up, also interested in answers to questions below.

Best regards/ Pagarbiai

Viktor Jevdokimov
Senior Developer

Phone: +370 5 212 3063
Fax: +370 5 261 0453

J. Jasinskio 16C,
LT-01112 Vilnius,

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and any copies.-----Original Message-----
From: Maciej Miklas []
Sent: Tuesday, November 01, 2011 11:15
Subject: Cassandra 1.x and proper JNA setup

Hi all,

is there any documentation about proper JNA configuration?

I do not understand few things:

1) Does JNA use JVM heap settings?

2) Do I need to decrease max heap size while using JNA?

3) How do I limit RAM allocated by JNA?

4) Where can I see / monitor row cache size?

5) I've configured JNA just for test on my dev computer and so far I've noticed serious performance
issues (high cpu usage on heavy write load), so I must be doing something wrong.... I've just
copied JNA jars into Cassandra/lib, without installing any native libs. This should not work
at all, right?


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