Question about memory

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Question about memory

Question about memory

2004-05-06 - By Yang Xiao

Back

Reply: 1 2 3 4 5 6 7 8 9 10 >>

Hi list,

I have 3 Tomcat 5.0.19 instances running with Apache 2.019 and JK2.

I did a simple load testing with JMeter last night and stopped it just
before I went home, so right now there's no incoming request whatsoever, but
TOP still shows heavy memory usage and swapping, it looks like even though
the load has subsided, Tomcat has not released the memory, what can I do
except restart the Tomcat instances to release the memory?

I'm not sure if this is a valid question, so I apologize if I seem to be
lack of some basic understanding of how things work.

Thanks in advance.

Also the tomcats are started with -Xms64 -Xmx256

Yang

Here's the top output

11:01:35 up 2 days, 15:28, 2 users, load average: 0.65, 0.20, 0.07

381 processes: 379 sleeping, 2 running, 0 zombie, 0 stopped

CPU states: cpu user nice system irq softirq iowait idle

total 1.0% 0.0% 56.1% 0.0% 0.0% 0.0% 42.7%

Mem: 513292k av, 505136k used, 8156k free, 0k shrd, 64872k
buff

280548k active, 208500k inactive

Swap: 1044216k av, 528888k used, 515328k free 7388k
cached

PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU COMMAND

8333 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:02 0 jsvc

8335 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:03 0 jsvc

8337 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:02 0 jsvc

8338 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:00 0 jsvc

8340 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:00 0 jsvc

8570 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8571 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8572 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8573 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8589 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8596 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8601 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8604 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:02 0 jsvc

8607 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:02 0 jsvc

8610 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8612 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8616 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8624 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8631 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8633 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8646 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8684 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:02 0 jsvc

8689 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8692 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:02 0 jsvc

8695 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8697 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8699 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8700 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8703 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8705 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:00 0 jsvc

8707 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8709 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8714 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8717 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8720 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8721 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:00 0 jsvc

8726 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8729 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8731 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8734 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8739 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8741 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8744 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8747 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8751 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8755 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:00 0 jsvc

8758 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:02 0 jsvc

8761 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8764 tomcat 16 0 203M 158M 80744 S 0.0 31.5 0:01 0 jsvc

8926 tomcat 15 0 203M 158M 80744 S 0.0 31.5 0:00 0 jsvc