How to purge AWR old snapshot details in database

— Find the AWR snapshot details.
select snap_id,begin_interval_time,end_interval_time from sys.wrm$_snapshot order by snap_id

— Purge snapshot between snapid 439 to 800
execute dbms_workload_repository.drop_snapshot_range(low_snap_id =>439 , high_snap_id =>800);

— Verify again
select snap_id,begin_interval_time,end_interval_time from sys.wrm$_snapshot order by snap_id’

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How to purge AWR old snapshot details in database

— Find the AWR snapshot details.
select snap_id,begin_interval_time,end_interval_time from sys.wrm$_snapshot order by snap_id

— Purge snapshot between snapid 439 to 800
execute dbms_workload_repository.drop_snapshot_range(low_snap_id =>439 , high_snap_id =>800);

— Verify again
select snap_id,begin_interval_time,end_interval_time from sys.wrm$_snapshot order by snap_id’

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View hidden parameters

Set lines 2000
col NAME for a45
col DESCRIPTION for a100
SELECT name,description from SYS.V$PARAMETER WHERE name LIKE ‘_%’ ESCAPE ‘\’
/

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Get DDL of privileges granted to user

set feedback off pages 0 long 900000 lines 20000 pagesize 20000 serveroutput on
accept USERNAME prompt “Enter username :”

execute dbms_METADATA.SET_TRANSFORM_PARAM(DBMS_METADATA.SESSION_TRANSFORM,’SQLTERMINATOR’,true);

SELECT DBMS_METADATA.GET_DDL(‘USER’,username) as script from DBA_USERS where username=’&username’
UNION ALL
SELECT DBMS_METADATA.GET_GRANTED_DDL(‘SYSTEM_GRANT’,grantee)as script from DBA_SYS_PRIVS where grantee=’&username’ and rownum=1
UNION ALL
SELECT DBMS_METADATA.GET_GRANTED_DDL(‘ROLE_GRANT’,grantee)as script from DBA_ROLE_PRIVS where grantee=’&username’ and rownum=1
UNION ALL
SELECT DBMS_METADATA.GET_GRANTED_DDL(‘OBJECT_GRANT’,grantee)as script from DBA_TAB_PRIVS where grantee=’&username’ and rownum=1;

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Get timezone information in database

SELECT version FROM v$timezone_file;

SELECT PROPERTY_NAME, SUBSTR(property_value, 1, 30) value
FROM DATABASE_PROPERTIES
WHERE PROPERTY_NAME LIKE ‘DST_%’
ORDER BY PROPERTY_NAME;

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How to View / Modify AWR retention period

— View current AWR retention period

select retention from dba_hist_wr_control;

— Modify retention period to 7 days and interval to 30 min

select dbms_workload_repository.modify_snapshot_settings (interval => 30, retention => 10080);

NOTE – 7 DAYS = 7243600= 10080 minutes

 

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Check the Characterset info of database

set pagesize 200
set lines 200
select parameter,value from v$nls_parameters where parameter like ‘NLS_%CHAR%’;

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