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From André Warnier ...@ice-sa.com>
Subject Re: memory trace of the server with 2 instances of tomcat 7 running
Date Thu, 30 Jul 2015 13:36:39 GMT
Ethen John wrote:
> 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
> …

Just a little thing here : under "top", if you enter "F" and then "n", it will show the 
processes in the order of memory usage. Did you do that ?
(I am asking because I see no "java" processes above, and they tend to come on top of the

list when there are any).

> =========================
> 
> 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
> 


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