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Full Discussion: Tuning Java on LINUX
Top Forums UNIX for Advanced & Expert Users Tuning Java on LINUX Post 302124352 by porter on Saturday 30th of June 2007 01:32:26 AM
Old 06-30-2007
Quote:
Originally Posted by crabbie_upk
Mem: 4149212k total, 3375016k used, 774196k free, 244924k buffers
Swap: 2097144k total, 0k used, 2097144k free, 2755996k cached
774196+2097144=2871340

which is in the same ball park as your -Xmx2588m

I suggest

(a) try the same in single-user mode with limited daemons running

(b) bigger swap
 

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DACS.JAVA(7)						  DACS Miscellaneous Information					      DACS.JAVA(7)

NAME
dacs.java - DACS Java support DESCRIPTION
This document describes support for Java provided by DACS. To enable Java support, DACS must be configured using the --enable-java flag. It may also be necessary to specify the location of the Java commands and include files. See dacs.install(7)[1]. Note Java support is currently very limited and should be considered experimental. It is currently only possible to call dacsauth(1)[2] and dacscheck(1)[3] using the Java Native Interface (JNI) provided. The command line arguments to both of these commands are exactly as documented in their manual pages. Each argument is passed as a String. The code is not thread-safe and is probably not suitable for being called many times within a particular process due to assumptions it makes about dynamic memory allocation. There are no immediate plans to improve or extend Java support. Using the existing capability to build the JNI layer, however, it should not be difficult for an experienced Java programmer to build upon the example Java code provided. With Java support enabled, building DACS will copy the JNI shared library and a .jar file to the library directory (default: /usr/local/dacs/lib), and the JNI include files to the include directory (default: /usr/local/dacs/include). The tools/java/jni distribution directory contains a simple script called javarun that demonstrates how to run dacsauth or dacscheck as a Java application. For example, to validate the Unix password for user somebody, run (as root): ./javarun dacsauth -m unix suff -user somebody -prompt DIAGNOSTICS
The return codes are as documented in the command's manual page. AUTHOR
Distributed Systems Software (www.dss.ca[4]) COPYING
Copyright2003-2012 Distributed Systems Software. See the LICENSE[5] file that accompanies the distribution for licensing information. NOTES
1. dacs.install(7) http://dacs.dss.ca/man/dacs.install.7.html 2. dacsauth(1) http://dacs.dss.ca/man/dacsauth.1.html 3. dacscheck(1) http://dacs.dss.ca/man/dacscheck.1.html 4. www.dss.ca http://www.dss.ca 5. LICENSE http://dacs.dss.ca/man/../misc/LICENSE DACS 1.4.27b 10/22/2012 DACS.JAVA(7)
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