logmem.sh (See related posts)

#!/bin/sh
# logmem.sh
# 2007 by Sascha Tayefeh
# continuously prints active memory from /proc/meminfo
# if fileentries exceed MAXENTRIES, then file is bzipped
# created for SUSE 10.2 
# some adaptions may be needed for use with other linuxes
#
# usage (OPTIONS ORDER IS CRUTIAL!!!):
# nohup /usr/bin/nice -n 19 logmem.sh [logfile.log] [maximum entries per logfile ] [logging interval in seconds]  &
#
# example:
# nohup /usr/bin/nice -n 19 logmem.sh mem.log 1747626 10  &
# nohup /usr/bin/nice -n 19 ~/src/sh/logmem.sh /tmp/mem.log 1747626 1 >& /tmp/logmem.sh.log &
# 
# to merge archived files do something like this:
#
# bunzip2 *.bz2
# rm -f mem.merged.log 
# find . -name "mem*" -exec cat {} >> mem.merged.log \;
#
# to CUT by TIME:
# cut -c9-29 mem.log
#


# Maximum number of entries per logfile
# When exeeded, file will be archived 

pathToBzip="/usr/bin/bzip2"

currentdir=`pwd`
unamestring=`uname -a`
hostname=$HOST
pid=`ps -d | grep logmem | awk '{print $1}'`


echo "********************"
echo logmem.sh 2007 by ST
echo "********************"
echo "unamestring: $unamestring"
echo "host: $hostname"
echo "user: $USER"
echo "date: `date`"
echo "logmem.sh PID: $pid"

if [ $# -lt 3 ];
then
   echo
   echo "******** ERROR: Too few arguments ********"
   echo "******** I need to have EXACTLY 3 arguments !!! ***********"
   echo
   echo  "usage (OPTIONS ORDER IS CRUTIAL!!!):"
   echo  "nohup /usr/bin/nice -n 19 logmem.sh [logfile.log] [maximum entries per logfile ] [logging interval in seconds]  &"
   echo 
   echo  "example:"
   echo  "nohup /usr/bin/nice -n 19 logmem.sh mem.log 1747626 10  &"
   echo 'nohup /usr/bin/nice -n 19 ~/src/sh/logmem.sh /tmp/mem.log 1747626 1 >& /tmp/logmem.sh.log &'

   echo 
   exit
else
   let interval=$3
   let MAXENTRIES=$2
   logfile=$1
fi

rm -f $logfile
echo "logfile: $logfile"
echo "loginterval: $interval"
echo "syntax of logfile: [timestamp] [active mem] [active swap]"
echo
echo "to merge archived files do something like this:"
echo 
echo " bunzip2 *.bz2"
echo " rm -f mem.merged.log "
echo " find . -name 'mem*' -exec cat {} >> mem.merged.log \;"
echo 
echo "logging started until aborted by KILL or something..."
echo 

let count=0

# enter endless loop
while [ 0 ];
do
   # get properties
   let mem=`grep "Active" /proc/meminfo | awk '{print $2}'`
   let swapTot=`grep "SwapTotal" /proc/meminfo | awk '{print $2}'`
   let swapFree=`grep "SwapFree" /proc/meminfo | awk '{print $2}'`
   let swapUsed=$swapTot-$swapFree
   datestr=`date +'%Y%m%d %H%M%S'`

   # log top file
   echo "$datestr $mem $swapUsed " >> $logfile

   # Achive file?
   if [ $count -ge $MAXENTRIES ];
   then
      let count=0
      $pathToBzip  -f -q -9 $logfile
      mv "$logfile.bz2" "$logfile.$datestr.bz2"
   fi

   # fall asleep
   sleep $interval

   let count=$count+1
done