Reading AWR Reports (Beginners Approach) If you are new to the AWR reports, the first thing you should probably do is run the ADDM report for the specific time period. Now use the dbms_workload_repository package to remove the AWR snapshots. What can bedone Posted on September 21, 2014 by Anand Recently i have been working on cleaning up SYSAUX tablespace for few of clients, so thought to put down my steps This gives you an indication of the bottlenecks in the system during this sample period.
However the snap_id is a bit confusing as it shows 414 when the actual max(snap_id) is 411. CREATE_BASELINE Functions & Procedures This function and procedure creates a baseline. Firstly turn off the production of snapshots for the duration of this activity: get the dbid for this database select dbid from v$database; -- get current snap interval (in minutes) Oracle technology is changing and we strive to update our BC Oracle support information.
Time model statistics indicating the amount of DB time associated with a process from the V$SESS_TIME_MODEL and V$SYS_TIME_MODEL views. Setting can be checked through DBA_HIST_WR_CONTROL. Syntax DBMS_WORKLOAD_REPOSITORY.DROP_BASELINE_TEMPLATE( template_name IN VARCHAR2, dbid IN NUMBER DEFAULT NULL); Parameters Table 146-18 DROP_BASELINE_TEMPLATE Procedure Parameters Parameter Description template_name Name of the template to remove dbid Database Identifier for baseline.
If the user manually specifies a value for Top N SQL, the AWR SQL collection will use the user-specified number for both automatic and manual snapshots. It and other WRH$ tables have many records with old snap_ids. It can take up to an hour but afterwards you can see the additional partitions have been created. Delete From Wrm$_snapshot_details BEGIN DBMS_WORKLOAD_REPOSITORY.modify_snapshot_settings( retention => 43200, -- Minutes (= 30 Days).
Currently, Oracle supports one value: l_options - 8. How To Purge Awr Snapshots I am surprised nobody else has noticed it before as it is a well read blog entry. Syntax DBMS_WORKLOAD_REPOSITORY.RENAME_BASELINE( old_baseline_name IN VARCHAR2, new_baseline_name IN VARCHAR2, dbid IN NUMBER DEFAULT NULL); Parameters Table 146-23 RENAME_BASELINE Procedure Parameters Parameter Description old_baseline_name Old baseline name new_baseline_name New baseline name dbid Database view publisher site So this document scenerio is different from the one I am facing AWR Retention select snap_interval, retention, most_recent_purge_time from sys.wrm$_wr_control; SNAP_INTERVAL RETENTION MOST_RECENT_PURGE_TIME-------------------- -------------------- ---------------------------------+00000 00:30:00.0 +00008 00:00:00.0 23-JUL-12 10.06.25.744 PM
Last observation: I tried different tests while troubleshooting. Sm/awr Purge It separates the creation of partitions from the auto-purge job. AWR is essentially a Oracle built-in tools, which collects statistical data associated with performance, and from those statistics derived energy degrees, to track potential problems. This would force me to increase the size of SYSAUX while waiting to get one partition a day. 2.
NOTE: The retention setting must be greater than or equal to the window size of the 'SYSTEM_MOVING_WINDOW' baseline. I know auto-purge execution can be checked from the database, but I prefer having the trace file, too. Purge Sysaux Tablespace Oracle 11g I rebuilt the WRH$* index partitions and indexes, and have about 1 GB of free space in SYSAUX. How To Shrink Sysaux Tablespace In 11g These are small, development databases that started out at 5 GB.
DROP_BASELINE Procedure This procedure drops a baseline. Exceptions An error will be returned if this baseline name already exists in the system. Dominik Reply John Hallas said July 15, 2015 at 2:18 pm Just done the command on 11.0.07. Thanks in advance. How To Reclaim Space From Sysaux Tablespace
For system-wide disable of AWR table flushing you can use these commands but beware that the AWR tablespace will continue to grow ad-infinitum: alter session set events 'immediate trace name awr_flush_table_off AWR_SQL_REPORT_HTML Function This table function displays the AWR SQL Report in HTML format. Skip to content Anand's Blog My experiences and views on Oracle Database drop_snapshot_range Purging SYSAUX Posted on September 24, 2014 by Anand In continuation to my previous post "SYSAUX Growing Rapidly" Examples This example drops the range of snapshots between snapshot id 102 to 105 for the local database: EXECUTE DBMS_WORKLOAD_REPOSITORY.DROP_SNAPSHOT_RANGE(102, 105); If you query the dba_hist_snapshot view after the Drop Snapshot
If ZERO is specified, automatic and manual snapshots will be disabled. Awr Purge Job I can not find doc 852028.1 in metalink. DROP_SNAPSHOT_RANGE Procedure This procedure drops a range of snapshots.
NOTE: If a zero value is specified for retention, snapshots will be stored for an unlimited time. Defaults to NULL. The activity needs to be done in startup restrict mode so requires downtime. How To Fix Inactive Dbids Found In Awr and 184.108.40.206 with no problem.
AWR snapshot can also import from other database, we are here to see: SQL> select dbid, retention fromdba_hist_wr_control; DBID RETENTION------------------------------------------------------------------------------- 877621333 +40150 00:00:00.0 879543530 +00008 00:00:00.0If it is from the snapshot If the partition contains at least one row which, according to the retention policy shouldn't be removed, then the partition won't be dropped and as such the table will contain old SQL> EXEC dbms_workload_repository.drop_snapshot_range(1,17753,1798927129); It can generate good amount of redo and use undo. and i also appreciate that you put hadith :)regards,Tahir March 1, 2013 at 2:20:00 AM PST Post a Comment Newer Post Older Post Home Subscribe to: Post Comments (Atom) Backup &
OBJECT Types AWR_BASELINE_METRIC_TYPE Object Type TABLE Types AWR_BASELINE_METRIC_TYPE_TABLE Table Type AWR_BASELINE_METRIC_TYPE Object Type This type shows the values of the metrics corresponding to a baseline. From version 11G onwards, the mmon purging process has been constrained to a time-limited window for each of the purges, if this window is exceeded the purging stops and an ORA-12751 l_sid Session ID (see Usage Notes) l_sql_id SQL ID (see Usage Notes) l_wait_class Wait class name (see Usage Notes) l_service_hash Service name hash (see Usage Notes) l_module Module name (see Usage After a SQL is uncolored, it will no longer be captured in a snapshot automatically, unless it makes the TOP list.
It was very helpfull ! Defaults to NULL dbid Database Identifier for baseline. When creating the baseline, the name of the baseline will be the prefix appended with the date information. Elapsed: 00:00:00.07 SYS01> SELECT COUNT(1) Orphaned_ASH_Rows FROM wrh$_active_session_history a WHERE NOT EXISTS (SELECT 1 FROM wrm$_snapshot WHERE snap_id = a.snap_id AND dbid = a.dbid AND instance_number = a.instance_number ); ORPHANED_ASH_ROWS -----------------
AWR_REPORT_HTML Function This table function displays the AWR report in HTML. In fact, AWR retention was just 8 days. The name of the view is directly associated with the table; for example, the view DBA_HIST_SYSMETRIC_SUMMARY is constructed in the WRH$_SYSMETRIC_SUMMARY table. It has saved me time.
Elapsed: 00:00:02.54 SYS01> COLUMN "Item" FORMAT A25 COLUMN "Space Used (GB)" FORMAT 999.99 COLUMN "Schema" FORMAT A25 COLUMN "Move Procedure" FORMAT A40 SELECT occupant_name "Item", space_usage_kbytes/1048576 "Space Used (GB)", schema_name "Schema", One method of purging data from these tables is by removing partitions that only contain rows that have exceeded the retention criteria.