Return-Path: X-Original-To: apmail-cassandra-user-archive@www.apache.org Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 5D77F7766 for ; Tue, 1 Nov 2011 09:15:58 +0000 (UTC) Received: (qmail 10371 invoked by uid 500); 1 Nov 2011 09:15:55 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 10208 invoked by uid 500); 1 Nov 2011 09:15:54 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 10179 invoked by uid 99); 1 Nov 2011 09:15:53 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 01 Nov 2011 09:15:53 +0000 X-ASF-Spam-Status: No, hits=-0.7 required=5.0 tests=FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of mac.miklas@googlemail.com designates 209.85.212.44 as permitted sender) Received: from [209.85.212.44] (HELO mail-vw0-f44.google.com) (209.85.212.44) by apache.org (qpsmtpd/0.29) with ESMTP; Tue, 01 Nov 2011 09:15:48 +0000 Received: by vws5 with SMTP id 5so6636214vws.31 for ; Tue, 01 Nov 2011 02:15:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=from:mime-version:date:message-id:subject:to:content-type; bh=VJs90bWRzp1RqB+9ngZxxC1k7dtnkMzH3pfJjTH4gPs=; b=WGHSTLb+RkgH7yzXRQzYNy0AschFvkl9WPsd5p34QapXt6s2fDipdicYurZ70zmE5w qeVrbpmFz+bmdhj1vK8wfZricpQhHWpU9eSVB9jYT2CSv1PmOZk9CUBptgZioKCHewnn xKFDxxyoG1zsEcH1chufbhLJrhEyxBLfMrh+U= Received: by 10.52.26.242 with SMTP id o18mr7650350vdg.100.1320138927336; Tue, 01 Nov 2011 02:15:27 -0700 (PDT) From: Maciej Miklas Mime-Version: 1.0 (1.0) Date: Tue, 1 Nov 2011 10:15:27 +0100 Message-ID: <167836318403381239@unknownmsgid> Subject: Cassandra 1.x and proper JNA setup To: "user@cassandra.apache.org" Content-Type: text/plain; charset=UTF-8 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? Thanks, Maciej