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Oracle Database, Fusion Middleware, Linux

Top Memory and CPU consumers UNIX, LINUX

  • Linux OS
#current user: $ ps u USER       
PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND 
user     16038  0.0  0.1   4852   784 pts/0    Ss+  Oct28   0:00 /bin/bash   

#to display the top CPU consumer 
$ ps aux | sort -nk +3 | tail -1     

#to display the top memory consumer 
$ ps aux | sort -nk +4 | tail -1   

#the top 10 (high to low) memory users in the system 
$ ps aux|sort -nk +4|grep -v USER|head -10
  • UNIX OS
# Top 10 processes using the most of CPU: 
$ prstat -s cpu -a -n 10   

# Top 10 processes using the most of Memory: 
$ prstat -s size -n 10   

# Virtual Memory Paging, 5 samples at 5 second intervals  
$ vmstat -S 5 5
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