top Command -R&D26012012

top Command

This command is used to find the load on the server. " top " command can also be used to find the process and users that causes load on the server. It gives information about the total process, sleeping process, the zombie process etc.

Example:

root@server [~]$ top -cd3

11:32:03 up 15 days, 23:57, 2 users, load average: 4.95, 5.13, 5.94

220 processes: 219 sleeping, 1 running, 0 zombie, 0 stopped

CPU states: cpu user nice system irq softirq iowait idle

total 1.5% 1.6% 2.4% 0.0% 0.0% 0.0% 94.3%

cpu00 3.4% 2.8% 2.8% 0.0% 0.0% 0.0% 90.9%

cpu01 0.3% 3.1% 0.0% 0.0% 0.0% 0.0% 96.5%

cpu02 2.5% 0.3% 6.5% 0.0% 0.0% 0.0% 90.6%

cpu03 0.0% 0.3% 0.3% 0.0% 0.0% 0.0% 99.3%

Mem: 3104932k av, 2909432k used, 195500k free, 0k shrd, 284548k buff

1201588k active, 1558304k inactive

Swap: 3004112k av, 499936k used, 2504176k free 1015264k cached

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

3754 root 16 0 1252 1252 896 R 1.4 0.0 0:01 2 top -cd3

3620 nobody 9 0 61460 45M 28768 S 0.6 1.4 2:23 0 /usr/local/apache/bin/httpd -DSSL

3604 mailnull 9 0 4204 4116 2816 S 0.2 0.1 0:00 0 /usr/sbin/exim -bd -q60m

29956 root 9 0 4684 3384 2640 S 0.1 0.1 0:31 0 /etc/authlib/authProg

1 root 8 0 468 440 416 S 0.0 0.0 0:34 2 init [3]

From the above example you can see the load average, total processes, sleeping processes and the CPU usage. You can find the load average ( here the load average is " 4.95 " ), the memory usage, stats, swap and the list of process and its users.