#!/bin/sh
#
# This script records "vmstat" information for a defined period of time, 
# (default of 1 day) and records it to a file with a time stamp for each 
# line.  when the script is done running each day, it compresses the log file.
#
# This script would typically be called from cron at just after midnight 
# each day.
#
# Usage:
USEAGE="vmlog [-i interval] [-c count] [-l logfile]"
#
# Logfile	- If not specified, this defaults to /var/tmp/vmlog with a 
#		date and time stamp appended to the end.
# Interval 	- If not specified, this defaults to 60 seconds.
# Count		- If not specified, this defaults to 24 hours worth of 
#		observations, the number of which depends on the interval 
#		chosen.
#
# Andy Welter
# www.the-welters.com
# 9/28/98
#
if [ $# -eq 1 ]; then
	echo $USAGE
	exit 1
fi

while [ $# -ge 2 ]; do
case $1 in 
	-c)	COUNT=$2
		shift 2
		;;
	-i)	INTERVAL=$2
		shift 2
		;;
	-l)	LOG=$2
		shift 2
		;;
	*)	echo $USAGE
		exit 1
		;;
esac
done

if [ -z "$INTERVAL" ]; then
	INTERVAL=60
fi
if [ -z "$COUNT" ]; then
	# Number of seconds in a day = 24x60x60=86400
	COUNT=`expr 86400 / $INTERVAL`
fi
if [ -z "$LOG" ]; then 
	LOG=`date +"/var/tmp/stats/vmlog.%y%m%d"`
else 
	LOG=`date +"$LOG.%y%m%d"`
fi

vmstat $INTERVAL $COUNT | while read LINE; do
	date +"%H:%M:%S $LINE" >> $LOG
done

compress $LOG