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#!/bin/bash
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# Author: Pekka Helenius (~Fincer), 2018
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# Collect system statistics at regular intervals
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# Check if the following file exists. If not, exit the script.
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[[ $(ls /etc/default/sysstat) ]] || exit
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# Enable stats
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[[ $(cat /etc/default/sysstat | grep "ENABLED=\"true\"") ]] || sudo sed -i 's/ENABLED.*/ENABLED="true"/' /etc/default/sysstat
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# How many days we take stats
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DAYS=2
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DATE_INTERVAL=$(echo $(date +%Y-%m-%d)_$(date +%Y-%m-%d -d "+$DAYS days"))
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# Interval of stats in seconds
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INTERVAL=20
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# Logs dir
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SARDIR=$HOME/sar_statistics
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SARSTAT_FILE=$SARDIR/sar_stats_$DATE_INTERVAL.file
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PIDSTAT_DIR=$SARDIR/pidstats
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##############
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[[ -d $PIDSTAT_DIR ]] || mkdir -p $PIDSTAT_DIR
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DAYS_SEC=$(( DAYS * 60 * 60 * 24))
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COUNT=$(( DAYS_SEC / INTERVAL ))
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##############
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# Ignore HANGUP signal. By setting this, we continue running commands presented below though this script has exited
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# Alternatively, use 'nohup' before any command execution. NOTE: 'nohup' doesn't work with functions
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trap "" HUP
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# Gather data for analysis
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# alternatively use 'nohup' as a prefix for this command
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sar $INTERVAL $COUNT -o $SARSTAT_FILE &>/dev/null &
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disown
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##########################################
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# How to print out statistics?
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# CPU
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# sar -u -f $SARSTAT_FILE
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# Memory
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# sar -r -f $SARSTAT_FILE
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# Mounted filesystems
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# sar -F MOUNT / -f $SARSTAT_FILE
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# Swap space stats
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# sar -S -f $SARSTAT_FILE
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# Network devices
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# sar -n DEV -f $SARSTAT_FILE
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# Network devices - errors
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# sar -n EDEV -f $SARSTAT_FILE
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# Network IPv4 sockets
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# sar -n SOCK -f $SARSTAT_FILE
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# Network IPv6 sockets
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# sar -n SOCK6 -f $SARSTAT_FILE
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# Network IPv4 traffic statistics
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# sar -n IP -f $SARSTAT_FILE
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# Network IPv4 traffic statistics - errors
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# sar -n EIP -f $SARSTAT_FILE
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# Network IPv6 traffic statistics
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# sar -n IP6 -f $SARSTAT_FILE
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# Network IPv6 traffic statistics - errors
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# sar -n EIP6 -f $SARSTAT_FILE
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# Network TCP protocol statistics
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# sar -n TCP -f $SARSTAT_FILE
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# Network TCP protocol statistics - errors
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# sar -n ETCP -f $SARSTAT_FILE
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# Inode, file etc. stats
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# sar -v -f $SARSTAT_FILE
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# Tasks statistics
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# sar -w -f $SARSTAT_FILE
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##########################################
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# Pidstat
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function pidstats() {
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while [[ $DAYS_SEC -ge 0 ]]; do
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pidstat -d >> $PIDSTAT_DIR/pidstat_stats_io_$DATE_INTERVAL
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# pidstat -R >> $PIDSTAT_DIR/pidstat_stats_realtime_$DATE_INTERVAL
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pidstat -r >> $PIDSTAT_DIR/pidstat_stats_pagefaults_$DATE_INTERVAL
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pidstat -s >> $PIDSTAT_DIR/pidstat_stats_stacks_$DATE_INTERVAL
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pidstat -u >> $PIDSTAT_DIR/pidstat_stats_cpu-tasks_$DATE_INTERVAL
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pidstat -v >> $PIDSTAT_DIR/pidstat_stats_kerneltables_$DATE_INTERVAL
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# We want to interrupt this loop if previous pidstat commands fail.
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if [[ ! $? == 0 ]]; then
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break 1
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fi
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DAYS_SEC=$(( DAYS_SEC - INTERVAL ))
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sleep $INTERVAL
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done
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}
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pidstats &
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echo -e "Collecting statistics with 'sar' and 'pidstat' commands for the following $DAYS days. All commands will stop at $(date '+%H:%M on %Y-%m-%d' -d '+2 days')."
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disown
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