I am using a play framework webapplication calling webservices, all these applications are deployed in one tomcat/apache server, when in production box, multiple process are started for tomcat which are occupying same MEM% which can be verified by top command. When the server is just started there are around 15 process which occupy 22% MEM (800m RES) and when the application is hit then the number of process increase to around 30-35 process.
As you can see the RES (Resident memory usage) is 880MB to 1.2 Gig, While the maximum memory allotted to tomcat is 256 MB using, -XX:PermSize=256m -XX:MaxPermSize=256m
Totally there are 3 web-application wars and 3 service wars deployed in this tomcat instance
PLEASE EXPLAIN HOW CAN I REDUCE THE MEMORY USAGE AND PROCESS FOR THIS APPLICATION???
AFTER START OF SERVER
top - 01:33:42 up 59 days, 1 min, 11 users, load average: 4.76, 4.49, 3.29 Tasks: 1496 total, 1 running, 1493 sleeping, 0 stopped, 2 zombie Cpu(s): 31.3%us, 1.9%sy, 0.0%ni, 64.8%id, 1.0%wa, 0.2%hi, 0.8%si, 0.0%st Mem: 3759600k total, 3707492k used, 52108k free, 57912k buffers Swap: 6313480k total, 3353744k used, 2959736k free, 155216k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
23070 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
23071 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
23072 resoluti 20 0 1330m 931m 9316 S 0 25.4 3:29.07 java
23073 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:06.84 java
23074 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:06.98 java
23075 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:28.86 java
23076 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.04 java
23077 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.16 java
23078 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
23079 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:55.73 java
23080 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:52.07 java
23081 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
23082 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.12 java
23083 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
23085 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
23647 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
23883 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
23885 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
23887 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
23893 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
24114 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
24122 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
24123 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
24126 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
24354 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
24375 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
24778 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
24843 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
25059 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
25069 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.04 java
25070 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
25071 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:02.62 java
25072 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.86 java
25073 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.40 java
25076 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
25077 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
25078 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
25079 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
25080 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
25559 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
25560 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
25561 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
25562 resoluti 20 0 1330m 931m 9316 S 0 25.4 0:00.00 java
17792 resoluti 20 0 86728 6376 1716 S 1 0.2 2:06.83 python
17793 resoluti 20 0 86728 6376 1716 S 0 0.2 0:00.04 python
17794 resoluti 20 0 86728 6376 1716 S 0 0.2 0:07.62 python
25340 resoluti 20 0 2868 1840 768 R 1 0.0 0:01.02 top
17791 resoluti 20 0 13724 1428 1428 S 0 0.0 0:00.14 python
