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From tran302 <91454_...@ing-life.co.jp>
Subject 32-bit JSW on 64-bit Java and performance
Date Mon, 04 Mar 2013 08:29:46 GMT
Hi,

I'm using ActiveMQ 5.4.3 on 32-bit Java, and want to upgrade to 64-bit Java.
I notice that in this version, 64-bit wrapper is not provided yet. Are there
any issues, bugs, or performance related problems reported on using 32-bit
wrapper for AMQ on 64-bit Java? I'm currently getting below message from the
wrapper when I start it on 64-bit Java:

STATUS | wrapper  | 2013/02/16 09:39:39 | --> Wrapper Started as Service
STATUS | wrapper  | 2013/02/16 09:39:39 | Launching a JVM...
INFO   | jvm 1    | 2013/02/16 09:39:40 | Wrapper (Version 3.2.3)
http://wrapper.tanukisoftware.org
INFO   | jvm 1    | 2013/02/16 09:39:40 |   Copyright 1999-2006 Tanuki
Software, Inc.  All Rights Reserved.
INFO   | jvm 1    | 2013/02/16 09:39:40 | 
INFO   | jvm 1    | 2013/02/16 09:39:40 | 
INFO   | jvm 1    | 2013/02/16 09:39:40 | WARNING - Unable to load the
Wrapper's native library 'wrapper.dll'.
INFO   | jvm 1    | 2013/02/16 09:39:40 |           The file is located on
the path at the following location but
INFO   | jvm 1    | 2013/02/16 09:39:40 |           could not be loaded:
INFO   | jvm 1    | 2013/02/16 09:39:40 |            
O:\ActiveMQ-Broker-5.4.3\bin\win32\..\..\bin\win32\wrapper.dll
INFO   | jvm 1    | 2013/02/16 09:39:40 |           Please verify that the
file is readable by the current user
INFO   | jvm 1    | 2013/02/16 09:39:40 |           and that the file has
not been corrupted in any way.
INFO   | jvm 1    | 2013/02/16 09:39:40 |           One common cause of this
problem is running a 32-bit version
INFO   | jvm 1    | 2013/02/16 09:39:40 |           of the Wrapper with a
64-bit version of Java, or vica versa.
INFO   | jvm 1    | 2013/02/16 09:39:40 |           This is a 64-bit JVM.
INFO   | jvm 1    | 2013/02/16 09:39:40 |           Reported cause:
INFO   | jvm 1    | 2013/02/16 09:39:40 |            
O:\ActiveMQ-Broker-5.4.3\bin\win32\wrapper.dll: Can't load IA 32-bit .dll on
a AMD 64-bit platform
INFO   | jvm 1    | 2013/02/16 09:39:40 |           System signals will not
be handled correctly.
INFO   | jvm 1    | 2013/02/16 09:39:40 | 
INFO   | jvm 1    | 2013/02/16 09:39:40 | Java Runtime: Sun Microsystems
Inc. 1.6.0_38 O:\Program Files\Java\jre6
INFO   | jvm 1    | 2013/02/16 09:39:40 |   Heap sizes: current=188352k 
free=180477k  max=466048k

Running Environment:
JRE 64-bit build 1.6.0_38-b05
Windows Server 2003 x64
12GB RAM

Also, is there any performance difference between 32-bit and 64-bit JVM in
general? Basically, I'm seeing slower performance in enqueing/dequeing
messages on 64-bit Java during testing, but I am not sure if this is because
I'm using 32-bit wrapper or 64-bit JVM is just slower. If neither, are there
any settings that we could adjust? Thank you in advance!



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