Commands

CPU and Memory Usage

top – i,o,A,M,i,z

mpstat  -P ALL

sysstat

sar – u 2 5

sar -o output.file 12 8 >/dev/null 2>&1 &

nohup sar -o output.file 12 8 >/dev/null 2>&1 &

sar -f data.file

Find out who is monopolizing or eating the CPUs

ps -eo pcpu,pid,user,args | sort -k 1 -r | head -10

or

# ps -eo pcpu,pid,user,args | sort -r -k1 | less

isostat

iostat -xtc 5 3

To See Threads ( LWP and NLWP)

# ps -AlFH

To See Threads After Processes

# ps -AlLm

See Every Process Running As User Ramesh

# ps -U ramesh -u ramesh u

Set Output In a User-Defined Format

# ps -eo pid,tid,class,rtprio,ni,pri,psr,pcpu,stat,wchan:14,comm

# ps axo stat,euid,ruid,tty,tpgid,sess,pgrp,ppid,pid,pcpu,comm

# ps -eopid,tt,user,fname,tmout,f,wchan

Find Out The Top 10 Memory Consuming Process

# ps -auxf | sort -nr -k 4 | head -10

Find Out top 10 CPU Consuming Process

# ps -auxf | sort -nr -k 3 | head -10