Dear Readers,
In this article, we wrote an automation job for Shell Script to gather stats for Stale tables.
Note :
1) Please test the Shell script in Non-Prod before implementing it in Production.
Script for gather stats for Stale tables
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#!/bin/bash function PreChks { ORACLE_HOME=/u01/app/oracle/product/12.1.0.2 if [[ ! -e $ORACLE_HOME ]]; then echo " " echo "Error ::: Given ORACLE_HOME :: $ORACLE_HOME does not exist!!! " echo " " exit; fi ORACLE_SID=mvmrp1 export PATH=$ORACLE_HOME/bin:$PATH:. export ORACLE_BASE ORACLE_HOME PATH ORACLE_SID LOGFILE=/tmp/main.log echo "Task Start at `date` " > $LOGFILE export MAIL_RECIPIENT_INFO='ktexperts@admin.com' } function get_objects { echo "#CHECK FOR DATABASE and Tables STATUS##">>"$LOGFILE" DB_OPEN_MODE=`sqlplus -s / as sysdba <<EOF set pagesize 0 feedback off verify off heading off echo off select open_mode from v\\$database; EOF` echo "$DB_OPEN_MODE">>"$LOGFILE" if [[ $DB_OPEN_MODE = "READ WRITE" ]] then echo "Fetch Stale_Stats Data" sqlplus -s / as sysdba <<EOF > /tmp/a.log set pagesize 0 feedback off verify off heading off echo off set linesize 300 select table_name, owner from dba_tab_statistics where stale_stats='YES' and owner in ('MVM1') order by table_name; EOF else ##DATABASE IS NOT OPEN## mail_subject="Database $INSTANCE is not open hence Gather Stats cant not Start...." echo " " echo "Database $INSTANCE is not open hence Gather Stats cant not Start...." echo " " mailx -s "${mail_subject}" ${MAIL_RECIPIENT_INFO}<<EOF " Database $INSTANCE is not open hence Gather Stats cant not Start...." EOF exit 0 fi cat /tmp/a.log >> /tmp/main.log } function gather_stats { cat /tmp/a.log | while read p do tbl=`echo $p | awk '{ print $1 }'` owner=`echo $p | awk '{ print $2 }'` SQL=`echo "Exec dbms_stats.gather_table_stats('$owner','$tbl',ESTIMATE_PERCENT=>dbms_stats.auto_sample_size,METHOD_OPT=>'for all indexed columns size 1',CASCADE=>True,degree=> 4);"` echo $SQL >> /tmp/main.log sqlplus -s / as sysdba <<EOF >> /tmp/main.log Exec dbms_stats.gather_table_stats('$owner','$tbl',ESTIMATE_PERCENT=>dbms_stats.auto_sample_size,METHOD_OPT=>'for all indexed columns size 1',CASCADE=>True,degree=> 4); EOF done } PreChks get_objects gather_stats get_objects mail_subject="mvmrp1 Stale Stats Report" cat "$LOGFILE" | mailx -s "${mail_subject}" ${MAIL_RECIPIENT_INFO} |
Output :
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################## Task Start at Mon Jun 14 21:00:01 PDT 2021 #CHECK FOR DATABASE and Tables STATUS## READ WRITE READ WRITE #CHECK FOR DATABASE and Tables STATUS## READ WRITE READ WRITE EMP MVM1 DEPT MVM1 SALGRADE MVM1 Exec dbms_stats.gather_table_stats('MVM1','EMP',ESTIMATE_PERCENT=>dbms_stats.auto_sample_size,METHOD_OPT=>'for all indexed columns size 1',CASCADE=>True,degree=> 4); PL/SQL procedure successfully completed. Exec dbms_stats.gather_table_stats('MVM1','DEPT',ESTIMATE_PERCENT=>dbms_stats.auto_sample_size,METHOD_OPT=>'for all indexed columns size 1',CASCADE=>True,degree=> 4); PL/SQL procedure successfully completed. Exec dbms_stats.gather_table_stats('MVM1','SALGRADE',ESTIMATE_PERCENT=>dbms_stats.auto_sample_size,METHOD_OPT=>'for all indexed columns size 1',CASCADE=>True,degree=> 4); PL/SQL procedure successfully completed. #CHECK FOR DATABASE and Tables STATUS## READ WRITE |
Add entry in the crontab :
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* 2 * * * /home/oracle/DBA/bin/mvmrp1_gather_stats_for_Staletables.sh > /dev/null 2>&1 |
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Note: Please test scripts in Non Prod before trying in Production.
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