Chiming,
Just a quick question.  Is JVM (1.3.1) going to allocate as much as
memory for Tomcat (4.1.24) if there is not a "-mx" option provided?

JVMs on various platforms have different defaults. I seem to rcall that the old Linux defaults for Sun's JVM was a 16MB heap, but that has been changed to 64MB in more recent versions.

If you do not specify -mx, then you will get whatever the defaults are.
You can use Runtime.maxMemory() to find out what maximum heap size that
Java will use. Note that it's the Java heap size; the JVM takes some
memory of its own to run, so the in-memory footprint of the JVM might be
larger than what you specify for -mx.

-chris


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