tangbomaozero的专栏

Manipulate your Java process heap – Basic KnowledgeAs I have mentioned at the beginning of Process Memory Model on AIX section, Java application in running itself is normally a process which most li

In this section, we are going to take up several typical problems associate with JVM for discussion. I will try to explain each problem with a sample I have met before, several commands was used durin

  I will focus on how 32-bit application allocates its heap in AIX. As to 64-bit application, there will be no need to juggle with the limited number of segments any more as the 64-bit user process ca

Introduction  After reading several articles on memory handling in Java in AIX, I decided to write something about this topic. For purposes of doing a summary for myself, also I hope it could be hel

 Default 32-bit Process Memory Model32-bit applications on AIX have an address space of 4 GB (2**32=4G), with virtual addresses ranging from 0x00000000 through 0xFFFFFFFF. AIX divides this address s

The Large Address-Space ModelBecause the system places user data, heap, and stack within the program data segment (segment 0x2), the system limits the maximum amount of stack, heap, and static data

2. Hang2-1. Phenomenon  You can not get any response from your application even the process is still alive.  (Check it with ps command)  I have experienced with such a case:  1) There is con

3. OutOfMemory3-1. Phenomenon  You got an OutOfMemory Error be outputted to log file, and the JVM fallen down.  It could be caused by either running out of Java Heap or Native Heap.  (OutOfMem

4. Fragmentation4-1. Phenomenon Even there are enough space to be allocated, JVM got down with an OutOfMemory Error without generating a core file.  As it may also depend on usage of your applic