Server Performance

Atop

  • atop -d disc access
  • atop -c cpu access
  • atop -p Process Information In Cumulative Manner
  • atop -u Cumulative Manner for user
  • atop -n network usage
    • atop -g general
    • atop -a all
    • atop -v verbose
    • atop -y show threads

Shortcuts

  • m memory usage

Log files

  • write to log file (binary) atop -w /tmp/atop.txt
  • read from log file (binary) atop -r /tmp/atop.txt

Output

  • SYSCPU show system side CPU usage
  • USRCPU shows user side CPU usage
  • VSIZE shows virtual memory size
  • RSIZE shows real memory size
  • RDDSK shows disk read
  • WRDSK shows disk write
  • RNET shows network receive
  • SNET shows network send
  • CPU shows CPU usage percentage
  • CMD shows related command

  • RRDSK shows read disk
  • WRDSK shows write disk
  • WCANCL
  • DSK shows general disk usage
  • CMD shows related command

 Sar

-sar -u user info

  • sar -r memory info
  • sar -d disc info