Java Memory Management on HP-UX

page 242/8/2005
(c) Copyright Hewlett Packard Company, 2005
Virtual Address Space Usage: Example 2
A) maxtsiz – 1GB
B) maxdsiz – 1GB
C) maxssiz – 400MB
D) Java heap - -Xms500m –Xmx1500m (will invoke java_q3p)
• New Size reserved: 524288000 initial: 174718976
• Old Size reserved: 1048576000 initial: 349569024
• Perm Size reserved: 67108864 initial: 1048576
E) JVM Code Cache – 32MB
F) 300 threads in the application (300 * 512KB = 150MB)
Space available for the Java thread stacks
Approximate (only significant, greater than 5MB, regions
shown in calculation)
3 GB – C – D – E – space consumed by TEXT – space consumed
by DATA