More Heap after Garbage Collection

[kurt.baumann]

Hi

Analyzing Garbage Collection we have seen on minor collection that the
value after garbage collection is bigger then the one when it's
started. Before Garbage Collection we have about 200 MByte, after
Garbage Collection we see somewhat about 380 MByte. Why?

Who has seen this? How do explain that?

Thx,
Kurt


46841.828: [GC 206027K->386192K(1047168K), 0.0121918 secs]
46841.840: [Full GC 386192K->43084K(1047168K), 1.2424545 secs]
46968.328: [GC 198411K->386690K(1047232K), 0.0091457 secs]
46968.337: [Full GC 386690K->41375K(1047232K), 1.2509296 secs]
47094.838: [GC 188697K->385119K(1047232K), 0.0086121 secs]
47094.847: [Full GC 385119K->41903K(1047232K), 1.2618177 secs]


************ Start Display Current Environment ************
WebSphere Platform 5.1 [JDK 1.4.2 1.4.2_04-b05] [BASE 5.1.1.5
cf50525.01]
Host Operating System is SunOS, version 5.8
Java version = 1.4.2_04, Java Compiler = null, Java VM name = Java
HotSpot(TM) Server VM

************ VM Options ************
-server
-verbose:gc
-Xms1024m
-Xmx2048m
-XX:MaxPermSize=64m
-XX:+PrintGCTimeStamps
-XX:+UseParallelGC

 

[Roedy Green]

Analyzing Garbage Collection we have seen on minor collection that the
value after garbage collection is bigger then the one when it's
started. Before Garbage Collection we have about 200 MByte, after
Garbage Collection we see somewhat about 380 MByte. Why?

the value of what? free ram? You SHOULD see an increase. That is
what GC is for. Obviously you must mean something else.