hi all, I have a linux server which is running 2 similar instances of Tomcats 7.
Each of the tomcat instances has the exact same web application (.war) deployed. The application is not actively used by the users, but the behavior of the application on both the tomcat instances is looking very sluggish. I checked the memory utilization of the server machine, which is as follows: top - 12:47:20 up 182 days, 43 min, 1 user, load average: 0.09, 0.16, 0.15 Tasks: 226 total, 1 running, 225 sleeping, 0 stopped, 0 zombie Cpu(s): 0.1%us, 0.2%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 15529M total, 11474M used, 4054M free, 485M buffers Swap: 16383M total, 0M used, 16383M free, 9633M cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 7866 root 0 -20 43036 12m 2640 S 12 0.1 2479:02 scopeux 1 root 20 0 10548 824 692 S 0 0.0 1:41.80 init 2 root 20 0 0 0 0 S 0 0.0 0:00.16 kthreadd 3 root 20 0 0 0 0 S 0 0.0 3:09.18 ksoftirqd/0 5 root 20 0 0 0 0 S 0 0.0 15:56.61 kworker/u:0 … ========================= yyy@xxx:~> free -m total used free shared buffers cached Mem: 15529 11469 4059 0 485 9633 -/+ buffers/cache: 1350 14178 Swap: 16383 0 16383 ====================== yyy@xxx:~> df -kh Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg00-rootvol 5.0G 1.4G 3.4G 29% / udev 7.6G 220K 7.6G 1% /dev tmpfs 24G 0 24G 0% /dev/shm /dev/sda1 510M 48M 437M 10% /boot /dev/mapper/vg00-homevol 992M 12M 929M 2% /home /dev/mapper/vg00-tmpvol 2.0G 201M 1.7G 11% /tmp /dev/mapper/vg00-varvol 7.9G 319M 7.2G 5% /var /dev/mapper/vg00-crashvol 2.0G 68M 1.9G 4% /crashdump /dev/mapper/vg00-auditvol 248M 11M 226M 5% /var/log/audit /dev/mapper/vg00-optvol 12G 1.5G 9.8G 13% /opt /dev/mapper/vg00-webdienste 99G 3.7G 95G 4% /webdienste -- Does the information above provide any pointers that can be addressed further. The strange thing is the used memory consumption of 11474M: Mem: 15529M total, 11474M used, 4054M free, 485M buffers I am also planning to have Lymbda probe installed on each of the tomcat instances to get more details. Afterwords, I am also planning to restart the server machine. The application works fine on the other earlier version (5) of Tomcat instance. It's just that we have now migrated the application to Tomcat 7 with Java 6 and experiencing this behavior. The new server machine only running 2 tomcat 7 instances and nothing else. Any help shall he appreciated. thanks.
