110 lines
3.5 KiB
Bash
Executable File
110 lines
3.5 KiB
Bash
Executable File
#!/bin/ksh
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#
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# SCRIPT: iostat_loadmon.ksh
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# AUTHOR: Randy Michael
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# DATE: 07/26/2007
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# REV: 1.0.P
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# PLATFORM: AIX, HP-UX, Linux, and Solaris
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#
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# PURPOSE: This shell script take two samples of the CPU
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# usage using the "iostat" command. The first set of
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# data is an average since the last system reboot. The
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# second set of data is an average over the sampling
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# period, or $INTERVAL. The result of the data aquired
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# during the sampling perion is shown to the user based
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# on the UNIX operating system that this shell script is
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# executing on. Different UNIX flavors have differing
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# outputs and the fields vary too.
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#
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# REV LIST:
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#
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#
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# set -n # Uncomment to check the script syntax without any execution
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# set -x # Uncomment to debug this shell script
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#
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###################################################
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############# DEFINE VARIABLES HERE ###############
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###################################################
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SECONDS=300 # Defines the number of seconds for each sample
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INTERVAL=2 # Defines the total number of sampling intervals
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STATCOUNT=0 # Initialize a loop counter to 0, zero
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OS=$(uname) # Defines the UNIX flavor
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###################################################
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##### SETUP THE ENVIRONMENT FOR EACH OS HERE ######
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###################################################
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# These "F-numbers" point to the correct field in the
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# command output for each UNIX flavor.
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case $OS in
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AIX|HP-UX) SWITCH='-t'
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F1=3
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F2=4
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F3=5
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F4=6
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echo "\nThe Operating System is $OS\n"
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;;
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Linux|SunOS) SWITCH='-c'
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F1=1
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F2=2
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F3=3
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F4=4
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echo "\nThe Operating System is $OS\n"
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;;
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*) echo "\nERROR: $OS is not a supported operating system\n"
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echo "\n\t...EXITING...\n"
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exit 1
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;;
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esac
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###################################################
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######## BEGIN GATHERING STATISTICS HERE ##########
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###################################################
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echo "Gathering CPU Statistics using vmstat...\n"
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echo "There are $INTERVAL sampling periods with"
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echo "each interval lasting $SECONDS seconds"
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echo "\n...Please wait while gathering statistics...\n"
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# Use "iostat" to monitor the CPU utilization and
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# remove all lines that contain alphabetic characters
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# and blank spaces. Then use the previously defined
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# field numbers, for example F1=4,to point directly
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# to the 4th position, for this example. The syntax
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# for this techniques is ==> $'$F1'.
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iostat $SWITCH $SECONDS $INTERVAL | egrep -v '[a-zA-Z]|^$' \
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| awk '{print $'$F1', $'$F2', $'$F3', $'$F4'}' \
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| while read FIRST SECOND THIRD FORTH
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do
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if ((STATCOUNT == 1)) # Loop counter to get the second set
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then # of data produces by "iostat"
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case $OS in # Show the results based on the UNIX flavor
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AIX)
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echo "\nUser part is ${FIRST}%"
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echo "System part is ${SECOND}%"
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echo "Idle part is ${THIRD}%"
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echo "I/O wait state is ${FORTH}%\n"
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;;
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HP-UX|Linux)
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echo "\nUser part is ${FIRST}%"
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echo "Nice part is ${SECOND}%"
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echo "System part is ${THIRD}%"
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echo "Idle time is ${FORTH}%\n"
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;;
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SunOS)
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echo "\nUser part is ${FIRST}%"
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echo "System part is ${SECOND}%"
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echo "I/O Wait is ${THIRD}%"
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echo "Idle time is ${FORTH}%\n"
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;;
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esac
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fi
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((STATCOUNT = STATCOUNT + 1)) # Increment the loop counter
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done
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