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From "Billy Ng" <>
Subject heap size config
Date Tue, 17 Jun 2003 07:55:21 GMT
Hi folks,

We config the java -Xms and -Xmx with the 512MB.  In Unix, java will make 512MB swap every
time we make a System Runtime call.  Therefore, we need to lower the -Xms to 64MB and -Xmx
remains 512MB so that it will not run out of swap space if too many threads making the System
Runtime call.  Will this hurt the Tomcat preformnace?  I read the article from Sun saying
the -Xms and -Xmx should be the same.  Is it always true?


Billy Ng
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