Shell Programming and Scripting

/path/to/some_program_that_needs_input <<EOF
YES
NO
SEP-05-2007
EOF

#!/bin/ksh
#
# Solaris 2.X Performance Monitoring Script
# Purpose: This script executes performance commands and notifies via
# e-mail when performance is poor.
# Useage: Execute the script from crontab at 30 minute intervals.
# Dependencies: None
# Outputs: Logfiles and e-mail
# CRONTAB EXAMPLE (Mon - Fri 7am - 6pm):
# 17,47 7-18 * * 1-5 /opt/admin/scripts/mon_prf.sh
#
#**************************************************************************
PATH=$PATH:/usr/sbin:/usr/bin

# Define the server's hostname
SRVNM=`uname -n`

# The directory this script resides in
ADMINDIR=/opt/admin/scripts

# Create log directory
DATDIR=/var/adm/log/mon_perf
if [ !  -d $DATDIR ] ; then
     mkdir -p $DATDIR
fi

# The next variable can be set for multiple addresses
MAILADD=tunji.salami@anglia.ac.uk

# vmstat  VMDAT=`vmstat 1 2 | tail -1`
# CPU Performance (vmstat - r column)
# When the 'r' or run queue column reaches above 3 processes per CPU,
# there is insufficient CPU power, and jobs are spending an
# increasing amount of time in the queue before being assigned to a CPU.
# This reduces throughput and increases interactive response time.


CPUPERF=`echo $VMDAT | awk '{ print $1 }'`
if [ "$CPUPERF" -gt "3" ]; then
 mail $MAILADD <<EOF

From:$SRVNM
To: $MAILADD
Subject: CPU Performance on $SRVNM
The vmstat run queue column has exceeded 3 processes per CPU on $SRVNM. There is                                              insufficient CPU power for the load placed

on  the server.
EOF

fi
# CPU Performance (vmstat - cpu id column)
# The cpu id column indicates what % the cpu is idle

CPUSTAT=`echo $VMDAT | awk '{ print $22 }`
if [ "$CPUSTAT" -lt "10" ]; then
    mail $MAILADD <<EOF

From:$SRVNM
To: $MAILADD
Subject: CPU Performance on $SRVNM
The vmstat cpu id column is less than 10 on $SRVNM.
The CPU is idle $CPUSTAT % of the time.
EOF

fi
# Memory Performance (vmstat - sr column)
# The experts say that when the 'sr' or scan rate column reaches above 200,
# the system is scanning through memory looking for pages to free at a high
# rate. This indicates active pages might be stolen from processes. A high
# scan rate can cause your system to consume more cpu resources than it
# normally would.

MEMSTAT=`echo $VMDAT | tail -1 | awk '{ print $12 }'`

if [ "$MEMSTAT" -gt "200" ]; then
    mail $MAILADD <<EOF

From:$SRVNM
To: $MAILADD
Subject: Memory Performance on $SRVNM
According to vmstat, the scanrate on $SRVNM is
$MEMSTAT. This indicates that there is not enough
memory to meet the server's current load.
EOF

fi
# TCP Connections
#  TCPCON=`netstat -aP tcp | tail +39 | wc -l`
 if [ "$TCPCON" -gt "900" ]; then
 mail $MAILADD <<EOF

From:$SRVNM
To: $MAILADD
Subject: TCP Connections on $SRVNM
According to netstat -a, there are currently $TCPCON
TCP connections on $SRVNM. This may or may not be  cause for concern.

EOF

fi

# NIC Input Errors
#

# netstat -i
#NETIDAT=`netstat -i | grep ce0`

#NICIE=`echo $NETIDAT | awk {'print $6'}`
#    if [ "$NICIE" -gt "10" ]; then
#           mail $MAILADD <<EOF

#From:$SRVNM
#To: $MAILADD
#Subject: NIC Input Errors on $SRVNM
#According to netstat -i, there are currently $NICIE
#input errors on $SRVNM ce0 NIC.

#EOF

#fi

# NIC Output Errors
#
#NICOE=`echo $NETIDAT | awk {'print $8'}`
#    if [ "$NICOE" -gt "10" ]; then
#           mail $MAILADD <<EOF
#From: $SRVNM
#To: $MAILADD
#Subject: NIC Output Errors on $SRVNM
#According to netstat -i, there are currently $NICOE
#output errors on $SRVNM ce0 NIC.
#EOF
#fi
# iostat
# Disk performance
# Create iostat data file
#DATFILE=$DATDIR/iostat.dat
#cp $DATFILE $DATFILE.old
#cp /dev/null $DATFILE
# Checking the iostat util column
#IODAT=`iostat -Dl 20 -n | tail -1`

#DSKSTAT=`echo $IODAT | awk '{ print $3, $6, $9, $12, $15, $18, $21, $24, $27, $                                             30, $33, $36, $39, $42, $45, $48, $51, $54,

$57, $60 }'`
# Will need to edit the next line to resolve this problem
#echo $DSKSTAT >> $DATFILE
#cat iostat.dat | awk {'print $2'}

#while read -r
#do
#        if [ "$REPLY" -gt "3" ]; then
#           mail $MAILADD <<EOF

#From: $SRVNM
#To: $MAILADD
#Subject: Disk Performance on $SRVNM
#According to iostat, the disk utilization on $SRVNM is
#greater than 3 on one of the server's hard disks. This
#indicates that the disk is being heavily used.
#EOF
#fi
#done < $DATFILE

# netstat

# CPU Data
#mpstat

# swap
#swap -l

# /tmp (Running out of swap space)
# du -sk /tmp

exit 0

#