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CHAPTER 7: PORT CONFIGURATION AND PORT ACCESS APPLICATION 37
Table 2 Java Runtime Parameters
-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.
.
VALUES -SYNTAX
DESCRIPTION
DEFAULT / COMMENTS
Command Example:
-Xms128M -Xmn128M -Xmx512M
Refer to the following links for additional information and for all the non-standard options:g
http://java.sun.com/j2se/1.4.2/docs/tooldocs/windows/java.html
http://java.sun.com/docs/hotspot/VMOptions.html