User guide

Chapter 8: Port Configuration and Port Access Application
50
 Java Tab in JRE 1.5
2. Locate Java Runtime Settings.
3. Insert the values of the Java Runtime Parameters using the syntax in
the following table, which contains the non-standard options.
Values - Syntax
Description
Default/Comments
-Xms<Size>
in bytes
Sets the initial
size of the
Java heap
2097152 (2MB)
 The -server flag increases the
default size to 32M.
 The values must be a multiple of,
and greater than, 1024 bytes
(1KB).
 Append the letter “m” or “M” to
indicate megabytes and “k” or
“K” to indicate kilobytes.
-Xmn<Size>
in bytes
Sets the initial
Java heap
size for the
Eden
generation
640K
 The -server flag increases the
default size to 2M.
 Append the letter “m” or “M” to
indicate megabytes and “k” or
“K” to indicate kilobytes.
-Xmx<Size>
in bytes
Sets the
maximum size
to which the
Java heap can
grow
64M
 The -server flag increases the
default size to 128M.
 The maximum heap limit is
approximately 2 GB (2048MB).
 Append the letter “m” or “M” to
indicate megabytes and “k” or
“K” to indicate kilobytes..