simple Java program spawns 11 threads

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1

i am running a simple java application on SUSE linux version
Linux tudev09 2.6.5-7.315-smp #1 SMP Wed Nov 26 13:03:18 UTC 2008 x86_64 x86_64 x86_64 GNU/Linux

It spawns 12 processes. There is only one program running as we can see from the output below, but there are 12 processes running for the same program which is slowing the system terribly.

20788 pts/12 0 3179 52 547215 136817 - 11532 - - - /usr/local/java/ibm-java2-i386-50/bin/java
20789 pts/12 0 16 52 547215 136817 - 11532 - - - /usr/local/java/ibm-java2-i386-50/bin/java
20790 pts/12 0 1 52 547215 136817 - 11532 - - - /usr/local/java/ibm-java2-i386-50/bin/java
20791 pts/12 0 153 52 547215 136817 - 11532 - - - /usr/local/java/ibm-java2-i386-50/bin/java
20792 pts/12 0 1 52 547215 136817 - 11532 - - - /usr/local/java/ibm-java2-i386-50/bin/java
20797 pts/12 0 3 52 547215 136817 - 11532 - - - /usr/local/java/ibm-java2-i386-50/bin/java
20798 pts/12 0 5 52 547215 136817 - 11532 - - - /usr/local/java/ibm-java2-i386-50/bin/java
20799 pts/12 0 0 52 547215 136817 - 11532 - - - /usr/local/java/ibm-java2-i386-50/bin/java
20800 pts/12 0 3 52 547215 136817 - 11532 - - - /usr/local/java/ibm-java2-i386-50/bin/java
20801 pts/12 0 5 52 547215 136817 - 11532 - - - /usr/local/java/ibm-java2-i386-50/bin/java
20802 pts/12 0 2 52 547215 136817 - 11532 - - - /usr/local/java/ibm-java2-i386-50/bin/java
20901 pts/24 0 279 98 3357 864 - 756 - - - ps -Hmw

Any help as to why it spawns the processes will be appreciated.

Sid.

2

Java threads… what can you say?

Try ps -eLf
(notice the capital L)

Examine that output and see if it makes any more sense.
Just guessing…

3

(1) You need to post more details about the program you are running.
(2) You are running IBM’s Java VM. I don’t know why. Some of the older Java VMs use OS level processes to implement each Java thread. Even simplest Java programs will have more than one thread.