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Home > Forums > MIS/IT > Operating Systems - UNIX based > IBM: AIX Forum

java on AIX6.1

Read More Threads Like This One

cpu533 (IS/IT--Management)

25 Apr 12 11:51

Hi,

We have some java program running on our AIX 6.1 server.
I am not familiar with JAVA. Basically this java application has the below setting. -Xms512m -Xmx2048m -XX:MaxPermSize=512m
I am using svmon to capture the actual memory been used by this java application.
Please see below capture.
initial capture:
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
25755686 java            107064     8305        0   104162      Y     Y     N

107064*4K = 418 M

in the middle of the day:
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
25755686 java            351450     8402        0   351360      Y     Y     N

351450 * 4K = 1372 M

with heavy data load;
-------------------------------------------------------------------------------
     Pid Command          Inuse      Pin     Pgsp  Virtual 64-bit Mthrd  16MB
25755686 java            652784     8427     4022   649612      Y     Y     N

652784 * 4K = 2549 M

So my question is why this java application used 2.5G memory as the xmx only set to 2048M?

THanks,
Denny

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