To Show Top 5 Sessions Consuming CPU

################################################
# Script to Show Top 5 Sessions Consuming CPU.
################################################

#############
# Description:
#############
echo
echo “=====================================================”
echo “This script Shows the Top 5 DB Sessions Consuming CPU …”
echo “=====================================================”
echo
sleep 1

#############################
# Listing Available Databases:
#############################
EXL_DB=”\-MGMTDB|ASM” #Excluded INSTANCES [Will not get reported offline].

# Count Instance Numbers:
INS_COUNT=$( ps -ef|grep pmon|grep -v grep|egrep -v ${EXL_DB}|wc -l )

# Exit if No DBs are running:
if [ $INS_COUNT -eq 0 ]
then
echo No Database Running !
exit
fi

# If there is ONLY one DB set it as default without prompt for selection:
if [ $INS_COUNT -eq 1 ]
then
export ORACLE_SID=$( ps -ef|grep pmon|grep -v grep|egrep -v ${EXL_DB}|awk ‘{print $NF}’|sed -e ‘s/ora_pmon_//g’|grep -v sed|grep -v “s///g” )

# If there is more than one DB ASK the user to select:
elif [ $INS_COUNT -gt 1 ]
then
echo
echo “Select the ORACLE_SID:[Enter the number]”
echo ———————
select DB_ID in $( ps -ef|grep pmon|grep -v grep|egrep -v ${EXL_DB}|awk ‘{print $NF}’|sed -e ‘s/ora_pmon_//g’|grep -v sed|grep -v “s///g” )
do
if [ -z “${REPLY##[0-9]*}” ]
then
export ORACLE_SID=$DB_ID
echo Selected Instance:
echo $DB_ID
break
else
export ORACLE_SID=${REPLY}
break
fi
done

fi
# Exit if the user selected a Non Listed Number:
if [ -z “${ORACLE_SID}” ]
then
echo “You’ve Entered An INVALID ORACLE_SID”
exit
fi

# #########################
# Getting ORACLE_HOME
# #########################
ORA_USER=`ps -ef|grep ${ORACLE_SID}|grep pmon|grep -v grep|egrep -v ${EXL_DB}|awk ‘{print $1}’|tail -1`
USR_ORA_HOME=`grep ${ORA_USER} /etc/passwd| cut -f6 -d ‘:’|tail -1`

# SETTING ORATAB:
if [ -f /etc/oratab ]
then
ORATAB=/etc/oratab
export ORATAB
## If OS is Solaris:
elif [ -f /var/opt/oracle/oratab ]
then
ORATAB=/var/opt/oracle/oratab
export ORATAB
fi

# ATTEMPT1: Get ORACLE_HOME using pwdx command:
PMON_PID=`pgrep -lf _pmon_${ORACLE_SID}|awk ‘{print $1}’`
export PMON_PID
ORACLE_HOME=`pwdx ${PMON_PID}|awk ‘{print $NF}’|sed -e ‘s/\/dbs//g’`
export ORACLE_HOME
#echo “ORACLE_HOME from PWDX is ${ORACLE_HOME}”

# ATTEMPT2: If ORACLE_HOME not found get it from oratab file:
if [ ! -f ${ORACLE_HOME}/bin/sqlplus ]
then
## If OS is Linux:
if [ -f /etc/oratab ]
then
ORATAB=/etc/oratab
ORACLE_HOME=`grep -v ‘^\#’ $ORATAB | grep -v ‘^$’| grep -i “^${ORACLE_SID}:” | perl -lpe’$_ = reverse’ | cut -f3 | perl -lpe’$_ = reverse’ |cut -f2 -d’:’`
export ORACLE_HOME

## If OS is Solaris:
elif [ -f /var/opt/oracle/oratab ]
then
ORATAB=/var/opt/oracle/oratab
ORACLE_HOME=`grep -v ‘^\#’ $ORATAB | grep -v ‘^$’| grep -i “^${ORACLE_SID}:” | perl -lpe’$_ = reverse’ | cut -f3 | perl -lpe’$_ = reverse’ |cut -f2 -d’:’`
export ORACLE_HOME
fi
#echo “ORACLE_HOME from oratab is ${ORACLE_HOME}”
fi

# ATTEMPT3: If ORACLE_HOME is still not found, search for the environment variable: [Less accurate]
if [ ! -f ${ORACLE_HOME}/bin/sqlplus ]
then
ORACLE_HOME=`env|grep -i ORACLE_HOME|sed -e ‘s/ORACLE_HOME=//g’`
export ORACLE_HOME
#echo “ORACLE_HOME from environment is ${ORACLE_HOME}”
fi

# ATTEMPT4: If ORACLE_HOME is not found in the environment search user’s profile: [Less accurate]
if [ ! -f ${ORACLE_HOME}/bin/sqlplus ]
then
ORACLE_HOME=`grep -h ‘ORACLE_HOME=\/’ $USR_ORA_HOME/.bash_profile $USR_ORA_HOME/.*profile | perl -lpe’$_ = reverse’ |cut -f1 -d’=’ | perl -lpe’$_ = reverse’|tail -1`
export ORACLE_HOME
#echo “ORACLE_HOME from User Profile is ${ORACLE_HOME}”
fi

# ATTEMPT5: If ORACLE_HOME is still not found, search for orapipe: [Least accurate]
if [ ! -f ${ORACLE_HOME}/bin/sqlplus ]
then
ORACLE_HOME=`locate -i orapipe|head -1|sed -e ‘s/\/bin\/orapipe//g’`
export ORACLE_HOME
#echo “ORACLE_HOME from orapipe search is ${ORACLE_HOME}”
fi

# TERMINATE: If all above attempts failed to get ORACLE_HOME location, EXIT the script:
if [ ! -f ${ORACLE_HOME}/bin/sqlplus ]
then
echo “Please export ORACLE_HOME variable in your .bash_profile file under oracle user home directory in order to get this script to run properly”
echo “e.g.”
echo “export ORACLE_HOME=/u01/app/oracle/product/11.2.0/db_1”
exit
fi

##########################################
# Exit if the user is not the Oracle Owner:
##########################################
CURR_USER=`whoami`
if [ ${ORA_USER} != ${CURR_USER} ]; then
echo “”
echo “You’re Running This Sctipt with User: \”${CURR_USER}\” !!!”
echo “Please Run This Script With The Right OS User: \”${ORA_USER}\””
echo “Script Terminated!”
exit
fi

###############################################
# SQLPLUS: Show Previous/Current SQL Statement:
###############################################

# SQL Script:
${ORACLE_HOME}/bin/sqlplus -s “/ as sysdba” << EOF
set linesize 143
set pagesize 1000
set feedback off
set trim on
set echo off
col USERNAME for a20
col MODULE for a25
col TERMINAL for a15
col “Current SQL” for a140
col “UNIX PID” for 9999999

SELECT * FROM
(SELECT count(*), p.spid “UNIX PID”, s.username, s.module, s.sid, s.serial#, q.sql_id “SQL ID”,q.SQL_TEXT “Current SQL” FROM v\$active_session_history h, v\$session s, v\$sql q, v\$process p WHERE
h.session_id = s.sid
AND h.session_serial# = s.serial#
AND session_state= ‘ON CPU’
AND p.addr = s.paddr
AND q.sql_id=s.PREV_SQL_ID
AND sample_time > sysdate – interval ’15’ minute
GROUP BY p.spid,s.username, s.module, s.sid, s.serial#,q.SQL_TEXT,q.sql_id
ORDER BY count(*) desc) where rownum <= 5;

EOF

###############
# END OF SCRIPT
###############

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