chg_awr_days()
{
db_id=$1
ret=$2
echo "Change the AWR number of days"
sqlplus -s "/ as sysdba" <<EOF
-- retention=>value in minutes so (45 days * 24 (hours per day) * 60 minutes per hour = 64800)
-- retention=>value in minutes so (30 days * 24 (hours per day) * 60 minutes per hour = 43200)
-- max value can be set by passing a value of 0 which means forever
-- . internal=>60min (snap at this interval), a value of 0 will turn off AWR
-- . topnsql . top N sql size, specify value of NULL will keep the current setting
exec dbms_workload_repository.modify_snapshot_settings(retention=>${ret}, interval=>60, topnsql=>100, dbid=>${db_id});
EOF
}