73bb13e7bc
For debugging performance issues we found that this script is very useful. Script collects the stats of vmstat/iostat/top/sar to get metrics about memory/disk/cpu/network respectively at the configured interval. It is very important to collect all these metrics at the same time so that they can be correlated easily, so made this into a script fixes bz#1633926 Change-Id: Iea52e55179b21c505953722c8898293fe92cb8de Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
53 lines
1.9 KiB
Bash
Executable File
53 lines
1.9 KiB
Bash
Executable File
#!/bin/bash
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################################################################################
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# Usage: collect-system-stats.sh <delay-in-seconds>
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# This script starts sar/top/iostat/vmstat processes which collect system stats
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# with the interval <delay-in-seconds> given as argument to the script. When
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# the script is stopped either by entering any input or Ctrl+C the list of
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# files where output is captured will be printed on the screen which can be
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# observed to find any problems/bottlenecks.
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###############################################################################
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function stop_processes {
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echo "Stopping the monitoring processes"
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echo "sar pid:$sar_pid", "top pid: $top_pid", "iostat pid: $iostat_pid", "vmstat pid: $vmstat_pid"
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kill "$sar_pid" "$top_pid" "$iostat_pid" "$vmstat_pid"
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echo "Files created: ${timestamp}-network.out, ${timestamp}-top.out, ${timestamp}-iostat.out, ${timestamp}-vmstat.out"
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}
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function check_dependent_commands_exist()
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{
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declare -a arr=("sar" "top" "iostat" "vmstat")
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for i in "${arr[@]}"
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do
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if ! command -v "$i" > /dev/null 2>&1
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then
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echo "ERROR: '$i' command is not found"
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exit 1
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fi
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done
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}
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case "$1" in
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''|*[!0-9]*) echo "Usage: $0 <delay-between-successive-metrics-collection-in-seconds>"; exit 1 ;;
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*) interval="$1" ;;
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esac
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timestamp=$(date +"%s")
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check_dependent_commands_exist
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sar -n DEV "$interval" > "${timestamp}"-network.out &
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sar_pid="$!"
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top -bHd "$interval" > "${timestamp}"-top.out &
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top_pid="$!"
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iostat -Ntkdx "$interval" > "${timestamp}"-iostat.out &
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iostat_pid="$!"
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vmstat -t "$interval" > "${timestamp}"-vmstat.out &
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vmstat_pid="$!"
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echo "Started sar, vmstat, iostat, top for collecting stats"
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trap stop_processes EXIT
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read -r -p "Press anything and ENTER to exit";
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