Controlfile Snapshot In RMAN
Aug 29, 2012I wish to know about Controlfile Snapshot in RMAN. Is this equalent to controlfile backup?
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RMAN :: Restore / Recovery From Snapshot Faster?
Aug 8, 2012Version : 11.2 on Solaris, AIX
All our production DBs are backed up by some Hitachi tool (apparently it is called ShadowImage) . Apparently they put all the tablespaces in Backup mode and 'take a snap' . Our BAU team says this is faster.
On an event of DB Crash Is it easier to restore, recover from these 'snapshots' ? Are these snapshots much faster than RMAN ?
Backup & Recovery :: Interoperability Between RMAN And VSS Snapshot Backups?
Jun 8, 2012is it possible to have a vss snapshot backup on the top of an RMAN backup. Because the link [URL] says that we can have an incremental level 1 backup on the vss snapshot backup.
So I need to know if interoperability between RMAN and VSS exists or not.
Also is it possible to have mixed backups meaning vss snapshot backups and rman backups. Whenever we take snapshot backup, is it updated in the control file?
Cannot Create Controlfile
Jun 27, 2012When I try create controlfile reuse resetlogs database 'cms';
ORA-01503: CREATE CONTROLFILE failed
ORA-01565: error in identifying file
'%ORACLE_HOME%DATABASEDBS1%ORACLE_SID%.ORA'
ORA-27048: skgfifi: file header information is invalid
OSD-04001: invalid logical block size (OS 1919900730)
What could be the problem? And why is it looking for DBS1%ORACLE_SID%.ORA' should there be such file?
ora11, Win2003 server
Generation Of ASH Report - Need Access To Controlfile
Jul 4, 2013I'm in 11203, and generation of ASH report is very slow.AWR and ADDM reports are generated quickly.To understand what happen, I check the wait event on the session that is executing ASH report, and I found that this session is waiting 99% with "controlfile sequential read". Is there any way to make the generation of ASH report quick ?Why the generation need to access to the controlfile?.
View 0 Replies View RelatedServer Administration :: Backup Of Controlfile
May 20, 2011I have 3 controlfile in those i lost 2 controlfiles as dba what we do? Is the following process is right?
shut the instance abnormally as shut abort
restore the backup
startup nomount
alter database recover automatic using backup controlfile until cancel;
recover cancel;
alter database open resetlogs;
and one more thing is thatwhat we need to restore? the backup of controlfiles which are lost/all the controlfiles/all the database files
Server Administration :: Create Controlfile In Standby Database
Jan 5, 2011we are having physical standby database and production database..we have create a soft link for a datafile in production to another mount point
ex- /disk1/data1 to /disk2/data1
now we want to keep the datafile in /disk2/data1 and remove the softlink..As we are having physical standby database . i need to know what are step to be taken. my action plan is as follows:
In production.
1. synchronise both standby(apply archive logs) and production.
2.shut down the standby
3.create controlfile in production in ascii format and edit the path (/disk1/data1 to /disk2/data1)
4. run the @control.sql that i have created
4.create a standby control file in production .
In standby:
1. take the backup of controlfile.
2.place the newly create controlfile(from production) to the location of controlfile
3. remove soft link.
4.startup mount.
5. then we can apply logs as usual to make the standby sync.
whether my action plan is 100% correct or any changes to be done.
SQL & PL/SQL :: ORA-01555 Snapshot Too Old?
Apr 29, 2010I am getting the ORA-01555 Snapshot Too Old error while excecuting my procedure (which is running in OLTP system). My procedure contains one table which master table of my DB which holds 1.2 GB of data. The proc is using the MERGE statement which is inserting or updating the data in the master table, while the condition of MERGE is using the subquery in which 2 DBlink table is used (in which one table is updating quite frequently). The proc. is executing in the interval of 6 hrs i.e 4 times a day and its is scheduled in job. find the proc. as an attachment.
View 3 Replies View RelatedSQL & PL/SQL :: Dropping A Snapshot
Apr 13, 2008I am unable to drop a snapshot , i tried even from sys, it is giving the following error,
drop snapshot adm.dup_resource_status
9:46:29 ORA-08103: object no longer exists
but, when i try to create a new snapshot with the same name
CREATE MATERIALIZED VIEW ADM.DUP_RESOURCE_STATUS
..............
I get
ORA-12006: a materialized view with the same user.name already exists.
ORA-01555 / Snapshot Too Old Error
Jan 12, 2012I have a problem regarding with Oracle Flashback Query.if I'm doing flashback a database two hours before,I'm receiving ORA-01555: snapshot too old error.My question is:How to able to extend the based on the hour or day?
View 1 Replies View RelatedReplication :: Index On A Snapshot In 8i
Feb 2, 2008Can i create an index on a snapshot... to increase the performance of searching.... in Oracle 8i.... provide with syntax...
Or else tell me how to increase the speed of a query on Snapshot.
Getting Error (snapshot Too Old) - Restructure Code?
Oct 8, 2013we are getting "snapshot too old" error when we executing a procedure. The error details are as below:
"ORA-01555: snapshot too old: rollback segment number 208 with .."
The code framework is below. basically we are having 3 cursor to select data and the base tables seems to update frequently. hence we understood that this error might come. if any other better way to restructure the below code framework.
Create or replace procedure proc1 as
CURSOR C1 is
select a from tab1
CURSOR C2 (p1 VARCHAR2)
is
select * from tab2;
[code]...
Since DBA not willing to change UNDO_RETENTION and other UNDO* parameters, we need to work around with restructure the code.
Generate AWR Report Between Two Timings (Not Snapshot ID)
Aug 12, 2013I have a requirement to create a generic script to generate awr report on the basis of two timings . We are planning to do load test on multiple server. The user will key in the start time and the end time of the load test and the script should round off the user entered time to the nearest snapshot id and generate a awr report. I have tried using the dba_hist_snapshot table fields begin_interval_time and end_interval_time column. However it failed.
The servers are running on 11g as well as 10g and few are in RAC and few single instances.
/************************************
* INPUT PARAMETERS
************************************/
UNDEFINE FROM_TIME
UNDEFINE TO_TIME
[Code]....
Performance Tuning :: No Snapshot Available For AWR Report
Feb 1, 2011I am trying to generate AWR report for database observation. But I am not getting any snapshot listed there. below is the output of my awrrpt.sql
SQL> @?/rdbms/admin/awrrpt.sql
Current Instance
~~~~~~~~~~~~~~~~
DB Id DB Name Inst Num Instance
----------- ------------ -------- ------------
1140984076 AFCCV 1 afccv
Specify the Report Type
~~~~~~~~~~~~~~~~~~~~~~~
Would you like an HTML report, or a plain text report?
Enter 'html' for an HTML report, or 'text' for plain text Defaults to 'html'
Enter value for report_type: html
Type Specified: html
Instances in this Workload Repository schema
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
DB Id Inst Num DB Name Instance Host
------------ -------- ------------ ------------ ------------
* 1140984076 1 AFCCV afccv SERVICEDB1
Using 1140984076 for database Id
Using 1 for instance number
Specify the number of days of snapshots to choose from
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Entering the number of days (n) will result in the most recent (n) days of snapshots being listed. Pressing <return> without specifying a number lists all completed snapshots.
Enter value for num_days: 3
Listing the last 3 days of Completed Snapshots
Specify the Begin and End Snapshot Ids
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Enter value for begin_snap:
SQL & PL/SQL :: Main Difference In Snapshot And View
May 3, 2010I want basics of snapshot...creation,deletion,check...etc and what main difference in snapshot and view..?
View 2 Replies View RelatedServer Utilities :: ORA-01555 - Snapshot Too Old?
Nov 3, 2010We are taking full logical backup ( export) in freeze hours( no user login). But prompting error "ORA-01555: snapshot too old: rollback segment number 7 with name "_SYSSMU7$" too small".
View 6 Replies View RelatedExpdp Slow With Error ORA-01555 - Snapshot Too Old On 11g?
May 15, 2013data pump export is very slow. For 50GB export has taken more than 24Hrs with one below error:
Database Version:11.2.0.2.0
OS: Windows server 2008 r2
Increased 10GB RAM and CPU 6 to 8 then also same issue
Error:
ORA-31693: Table data object "BNCSDB"."MS_DATA_PTORE" failed to load/unload and is being skipped due to error:
ORA-02354: error in exporting/importing data
ORA-01555: snapshot too old: rollback segment number 20 with name "_SYSSMU20_4037596720$" too small
Export log:
Export: Release 11.2.0.2.0 - Production on Tue May 14 20:03:25 2013
Copyright � 1982, 2009, Oracle and/or its affiliates. All rights reserved.
;;;
Connected to: Oracle Database 11g Release 11.2.0.2.0 - 64bit Production
Starting "SYSTEM"."SYS_EXPORT_SCHEMA_01": system/********@orcl dumpfile=BCSDB04_19.dmp logfile=BCSDB04_19.log
[code]...
Number Of Waits Reaches To 100 In 8-hour Snapshot
Oct 8, 2013in the awr report I saw some segments in Segments by ITL Waits section. Number of waits reaches to 100 in 8-hour snapshot. Is it small/big number? Should I consider increase INITRANS or there is nothing to be worried because value 80-100 are not too high?
View 3 Replies View RelatedReplication :: Refresh Snapshot Data Without Logging
Jan 20, 2009Materialized views are normally used for summarized data access.
CREATE MATERIALIZED VIEW mv_snapshot_A
REFRESH FAST START WITH SYSDATE
NEXT SYSDATE + 20/1440
WITH PRIMARY KEY
AS SELECT * FROM A;
This does not seem to be the case here as the materialized view seems to be just a full select. The overhead of the snapshot logs are concerning for this core table. Can we turn off logging in 10g ? the materialized view is defined as fast refresh/ build immediate .
The main requirement here is to keep the snapshot every 15 minutes so that the users can see the updated information ( the flow of data from one location to other).
User get the location wise count of data and can go further in details like in which location wise system wise data count. As the base table is volatile the materialized view is used so that the moment the user clicks for location wise details the data is static for 15 min and user don't get confused.
Replication :: Difference Between Materialized View And Snapshot
Jul 7, 2008what is the difference between materialized view and snapshot ?
View 1 Replies View RelatedServer Utilities :: Snapshot Error During Export
Jul 1, 2010i am getting "snapshot too old " error while take in export backup of a database(with CONSISTENT=y), it actually runs for 3 hours.
it always fails for table1 with snapshot error
i pulled the awr for that 3 hours, to see any long running SQL hitting table1 . and i found 3 , Two SELECT and one INSERT.
I assume it is INSERT not letting me take a consistent export backup of Table1 .
Replication :: Materialized Views Refresh In Snapshot-group?
Mar 24, 2010How to refresh the dependent materialized views in a snapshot group. It refreshes in the order we add the materialized views to snapshot group?
Here below is the scenario.
MATVW_A
CREATE MATERIALIZED VIEW MATVW_A BUILD IMMEDIATE
REFRESH FAST ON COMMIT
AS SELECT * FROM EMP;
MATVW_B
CREATE MATERIALIZED VIEW MATVW_B BUILD IMMEDIATE
REFRESH FAST ON COMMIT
AS SELECT * FROM MATVW_A;
MATVW_C
CREATE MATERIALIZED VIEW MATVW_C BUILD IMMEDIATE
REFRESH FAST ON COMMIT
AS SELECT * FROM MATVW_B;
I created a snapshotgroup SNGRP with all the above materialized views.
DBMS_REFRESH.MAKE(name => 'SNGRP',
tab => 'MATVW_A,MATVW_B,MATVW_C',
next_date => TRUNC(sysdate) + 1,
interval => 'SYSDATE + 1');
The order of refreshing the materialized views would be like first materialized view MATVW_A should get refresh then after MATVW_B,MATVW_C.
As they are dependent views.Is there anyway where we can mention the order of refreshing materialized views in snapshot group.
Performance Tuning :: Snapshot Skipped In Between Scheduled Time?
Sep 11, 2013Yesterday, there were performance issue at server. So today, when i am generating report for that particular period, found snapshot id sequence is serially but with skipped hourly timed. Instead of generating report at 15:30, it generated at 16:30.
Enter value for num_days: 2
Listing the last 2 days of Completed Snapshots
Snap
Instance DB Name Snap Id Snap Started Level
------------ ------------ --------- ------------------ -----
tagidev TAGIDEV 2857 10 Sep 2013 00:30 1
2858 10 Sep 2013 01:30 1
2859 10 Sep 2013 02:30 1
2860 10 Sep 2013 03:30 1
2861 10 Sep 2013 04:30 1
2862 10 Sep 2013 05:31 1
[code]....
Below are the details at alert log -
Tue Sep 10 14:28:20 2013
Thread 1 cannot allocate new log, sequence 7029
Checkpoint not complete
Current log# 2 seq# 7028 mem# 0: E:APPORACLEORADATATAGIDEVREDO02.LOG
Thread 1 advanced to log sequence 7029 (LGWR switch)
[code]....
1) why snap didn't started at 15:30?
2) since database just started at the scheduled time of AWR snap time. But generated at 16:32 instead of 16:30, though last services "SMCO" is started at 16:42. How it snap id generated for this particular time?
3) what does "kewastUnPackStats(): bad magic 1 (0x000000001B3CE48D, 0)" mean?
Server Administration :: How To Check Error ORA-01555 / Snapshot Too Old
Dec 23, 2011i am getting this error during expdp ORA-01555 -snapshot too old
1. i increased undo_retention i.e 50000
2. i execute expdp during late night when almost zero user is online so no commit from any other session.
3. we have a table having BLOB data type field in a table which is 500 GB in size.complete DB size is 700 GB
where and why this error exists.if corruption of BLOB so how to check that etc. the same error is occurring in three of our data centres during expdp.
Server Administration :: Remove Synonym STATS$SNAPSHOT-ID?
Sep 11, 2007I've got to collect statistics by DBMS_STAT. For the first time, the spcreate.sql is to be called, however, it returned one error following:
If this script is automatically called from spcreate (which is the supported method), all STATSPACK segments will be created in the PERFSTAT user's default tablespace.
Using perfstat tablespace to store Statspack objects
... Creating STATS$SNAPSHOT_ID Sequence Sequence created.
create public synonym STATS$SNAPSHOT_ID for STATS$SNAPSHOT_ID
*
ERROR at line 1:
ORA-00955: name is already used by an existing object Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production With the Partitioning, OLAP and Data Mining options
And then, I checked it again with its owner:
SQL> select owner, synonym_name
2 from dba_synonyms
3 where synonym_name='STATS$SNAPSHOT_ID';
OWNER SYNONYM_NAME
------------------------------ ------------------------------
PUBLIC STATS$SNAPSHOT_ID
Then, I checked again after dropping schema PERFSTAT:
SQL> conn /as sysdba
Connected.
SQL>
SQL> select username, account_status
[code]...
What's the STATS@SNAPSHOT_ID synonym? Can I remove it from PUBLIC owner and recreate?
Replication :: MV Views To Snapshot Data Pros And Cons
Nov 4, 2012I have 3 reporting tables with 2.2 million records each being rebuilt nightly. The data is used online 24/7 by users and thus, snapshot tables are being built from the refreshed reporting tables. The current method to do this:
delete from snapshot table;
insert into snapshot table (select * from report table);
<repeat for other 2 tables>
commit;
This seems to me to be resource intense on the system even though the table is defined with nologging option.
Is it better to create a MV (select only with refresh complete on demand)? The query is very simple without joins so it at first seems like overkill. However, I am also seeing that dbms_mview.refresh allows for an atomic option. Thus, if 1 of the 3 MVs fails during refresh all 3 rollback, which is a nice feature.
Are there better ways to replicate a snapshot table that I've missed? Is a delete and insert strategy a bad idea?
Export/Import/SQL Loader :: Expdp Failing With Snapshot Too Old Error
Sep 4, 2012We are getting the below errors while migrating partitioned tables using expdp.
The source and target databases are both running on 10.2.0.5 and the main thing is source database doesn't have any active sessions. This is a clone of a Prod Database and no one is accessing it.
ORA-31693: Table data object "DPMMGR"."WHSE_CTNR_EVNT_W":"MSG_PRCS_N"."MSG_PRCS_N_DC556" failed to load/unload and is being skipped due to error:
ORA-02354: error in exporting/importing data
ORA-01555: snapshot too old: rollback segment number 31 with name "_SYSSMU31$" too small
ORA-31693: Table data object "DPMMGR"."RLTM_PRDCT_LOG":"RPL_20120814" failed to load/unload and is being skipped due to error:
ORA-02354: error in exporting/importing data
ORA-01555: snapshot too old: rollback segment number 14 with name "_SYSSMU14$" too small
Undo Tablespace has enough space but still the expdp is failing.
SQL>/
TABLESPACE Totalspace(MB) Used Space(MB) Freespace(MB) % Used % Free
--------------- --------------- -------------- ------------- ---------- ----------
UNDO01 145096 115338 29758 79.49 20.51
SQL> show parameter undo
[code]....
Server Administration :: Query Fails With Error ORA-01555 / Snapshot Too Old
Jun 23, 2011We are running a query in one of our databases using the database the link. The query fails in the middle with "ORA-01555: snapshot too old". Not sure, about the database which this error message points to? Will it be the database we have logged in or it is the database where db link points ?
View 7 Replies View RelatedData Guard :: Convert Snapshot Database (standby) Directly To Primary?
Dec 16, 2012(Oracle 11gR1 OEL 5)Is there any possibility to convert snapshot database (standby) directly to Primary. Instead of manual switchover I want to do this
I have checked that snapshot creates a guaranteed restoration point which reverts back changes in Standby.
RMAN :: RMAN-03014 / Implicit Resync Of Recovery Catalog Failed
May 29, 2013My oracle backup via Netbackup failing with error 6 (Netbackup) and i have checked the logs please find the RMAN log file as well.
Script /opt/rman_script/st72_oracle_full.sh
==== started on Tue May 28 15:27:46 SGT 2013 ====
RMAN: /OraBase/V10203/bin/rman
ORACLE_SID: ST72
ORACLE_USER: oracle
ORACLE_HOME: /OraBase/V10203
NB_ORA_FULL: 1
NB_ORA_INCR: 0
[code]....