Alter system switch logfile

Hi all

RHEL5

We make the standby database as our report server. It comes to unload part of the Production workload to improve performance.

To get the latest data, or before you run reports on the standby server, I'll first > alter system switch logfile;

So that the backup database will be updated the last transactions to date.

How often should I run the command? Is this enough to run it only once? or I'll run it n times according to the number of newspapers of recovery?

Thank you very much.

In 9i to run queries on the standby database, you must open the database in read-only mode standby. In this case there is therefore no question of switching logfile or so. Before opening the database in standby mode ReadOnly, you make sure that all the archiving of primary logs are applied to the standby database in managed recovery mode. Once this Eve is open for requests.

I suggest you read below. It erases the concepts and is specific for 9i

Log apply Services

concerning

Pravin

Tags: Database

Similar Questions

alter system switch logfile crashes

Hi Experts,
Please help me determine the above error.
Recently, I was told to take one of our EBS environment in archivelog mode. While doing this activity, I coped 'ORA-16014.
The steps that I follow are listed below:
SQL > alter system set log_archive_dest_1 = ' location = / mnt/DEVarchive/trcdev ' scope = spfile;
Modified system.
SQL > alter system set log_archive_format='TRCDEV_%s_%t_%r.arc' scope = spfile;
Modified system.
SQL > shutdown immediate;
The database is closed.
The database is dismounted.
ORACLE instance stops.
SQL > startup mount
ORACLE instance started.
Total System Global Area 4275781632 bytes
Bytes of size 2235208 fixed
989856952 variable size bytes
3271557120 of database buffers bytes
Redo buffers 12132352 bytes
Mounted database.
SQL > alter archivelog database;
Database altered.
SQL > list of archive logs
Database log mode Archive Mode
Active AutoArchive
Archives/mnt/DEVarchive/trcdev of destination
More old sequence of journal online 9
Log sequence archive 11
Current log sequence 11
SQL > alter database open;
Database altered.
SQL > alter system switch logfile;
Modified system.
SQL > /.
Modified system.
SQL > /.
Now, the session hangs then I checked my alert log file and found the details below
ARCH: Stopped archiving, error occurred. Will continue to retry
TRCDEV ORACLE instance - error check-in
ORA-16014: connect 2 sequence # 11 not archived, not available destinations
ORA-00312: wire 2 1 online journal: ' / mnt/DEVdata/trcdev/redo02a.log'
ORA-00312: wire 2 1 online journal: ' / mnt/DEVdata/trcdev/redo02b.log'
After reading the newspaper to alert carefully, it is clear that it is not able to archive the logs and archiving is hung.
The reason could be my destination Archive got filled, but in my case, my destination archive has a free space of about 24 G.

Please tell me how to troubleshoot further, a quick response will be highly appreciated.

-Thank you

@John

I checked log_archive_dest_2 and it is set to null. And I think it would be better if I leave it in its default state.

@Mustafa

Db_recovery_file_dest is also set to null.

Further, I disabled the archivelog mode and erase all the settings that I did for archiving logs (parameter as log_archive_dest_1 log_archive_format).

I have another session close immediately and started the database in editing mode. After that, I activated all the setting again and activated the archivelog mode for my database.

SQL > alter database open;

Did bounce my DB once again, and then manually change logfiles 2 - 3 times and BOOM everything seems to work fine now. No more no hung sessions and archives are generated too.

A big thanks to everyone in this thread.

ALTER database switch logfile
Hi friends,

Oracle 9i DB

I do a backup of database pending (Hi-brid) and keep updated every hour on the top of the hour sked with the archive logs generated.

I'm just a little confused. If I have 3 log files, and if I command "edit files of newspapers to switch to database", 3 log files
be converted in newspapers of backup archive? or only one of them only and I must issue the order 3 x so that I'll be able to get all the last transaction inside the 3 redo log to be applied to the standby server.

Thank you very much

Mrs. Mina
No it's not really necessary: redo log switch once should be enough if you send the archived standby redo log and apply in standby mode.

Diff between switch logfile and archive current log
Hello
I see that the effect for the two statements are the same
ALTER SYSTEM switch logfile;
=
ALTER SYSTEM archive log current;

is that there is no difference between them?
Thank you
Hello..

ALTER SYSTEM switch logfile;

=
ALTER SYSTEM log current ;> archives

alter system switch logfile--> switches to the following log file, regardless of the mode that the database is in ARCHIVELOG or NOARCHIVELOG mode. If the archivelog mode change system swicth logfile will generate the Archives of the redolog which was changed.

change the current archiving--> oracle here log system passes current related to records and archives as well as all other newspapers not archived. It can be fired only the database that is in ARCHIVELOG mode.

[http://download.oracle.com/docs/cd/B10501_01/server.920/a96519/backup.htm]

HTH
Anand

cannot switch logfiles ensure the status = Active
Salvation of DBA

I have tried to create some logic Eve on 10.2 on fedora 6 on manual http://download.oracle.com/docs/cd/B19306_01/server.102/b14239/create_ps.htm#g88234
I can't create good work standby redo logs.

ALTER DATABASE ADD STANDBY LOGFILE GROUP 4
('/ u01/app/oracle/oradata/ORCL/onlinelog/log4a.log',)
U01/app/Oracle/flash_recovery_area/ORCL/onlinelog/log4b.log') SIZE 50 M;

then create the rest of the oder standby and switch logfile:
ALTER SYSTEM SWITCH LOGFILE;

When:
SQL > SELECT GROUP #, THREAD #, SEQUENCE #, ARCHIVED, STATUS FROM V$ STANDBY_LOG;
GROUP # THREAD # SEQUENCE # ARC STATUS
4 0 0 YES NO ASSIGNED
5 0 0 YES NO ASSIGNED
6 0 YES 0 UNASSIGNED
What should do?

Published by: val75 on June 21, 2009 23:08
Log switch try primay

Please try to run this command, then open the primary database.

ALTER database base_de_donnees ensures together to improve performance;

ALTER database open;

difference between switch logfile and checkpoint
Hi all
What is the difference between
Forcing log switches:
ALTER SYSTEM switch logfile;

and
ALTER SYSTEM checkpoint;

When I use one and don't use the other

Thank you very much
Its similar comparison mangoes with tomatoes. Checkpoint is a number that is used to make sure that everything is in harmony with the other data files, control files. They are used in different places for different reasons.
The newspaper fles, as mentioned by Satish, Siwtching is used when it is necessary to create a log file to archive. The only link between this and the control point is that this event causes also point of control and full control point to arrive.
HTH
Aman...

When ALTER SYSTEM ARCHIVE LOG happens implicitly...
Hello

When you scan the v$ archived_log SIDE primary SCHOOL, I saw below output

NAME OF CREATOR REGISTR SEQUENCE # FAL
-------------------------- ------- ------------ ----------------- ---
/U05/prod/archivelogs/ARC_816992406_1_22885.dbf ARCH ARCH 22885 No.
/U05/prod/archivelogs/ARC_816992406_1_22886.dbf FGRD FGRD 22886 No.

Then I went to the alert log file and search for the sequence #, I found that

When the newspaper switch happens through * ALTER SYSTEM ARCHIVE LOG *, then this sequence archive log CREATOR and REGISTRAR will be FGRD.
What command of newspaper happens automatically (90% complete log file), then this sequence archive log CREATOR and REGISTRAR will be ARCH.

If * ALTER SYSTEM ARCHIVE LOG * happens synchronously means control will not return to the process unless and until the underlying log file has been
archived completely, so the CREATOR and the REGISTRAR is FGRD.

My question is, under what circumstances * ALTER SYSTEM ARCHIVE LOG * happen implicitly.

Thank you
Hello

user9085814 wrote:
Thanks for the reply...

I agree with you.

The environment that I take abt is DATAGUARD Enviornment.

I have not published ALTER SYSTEM ARCHIVE LOG CURRENT of any session (foreground process) of the primary DB.
But I can still see ALTER SYSTEM ARCHIVE LOG in the log to alter.

When you call the command ALTER SYSTEM ARCHIVE LOG CURRENT , then oracle write in the journal of the alerts as:

On primary
```
 Wed May 15 09:16:56 2013
 Archived Log entry 789 added for thread 1 sequence 396 ID 0xf23a6e3f dest 1:
 *ALTER SYSTEM ARCHIVE LOG*
 Thread 1 cannot allocate new log, sequence 398
```
>

So my question on what scenario ALTER SYSTEM ARCHIVE LOG will be captured in the log of alerts.
because it's a mistake to run foreground process ALTER SYSTEM ARCHIVE LOG .

Have you had a logs archived backup RMAN script which is called ALTER SYSTEM ARCHIVE LOG CURRENT
```
 RMAN> run
           {
              sql 'ALTER SYSTEM ARCHIVE LOG CURRENT';
              backup  archivelog all delete all input;
           }
```
If you try the command ALTER SYSTEM ARCHIVE LOG CURRENT on stanby, you get error ORA-01109: database is not open. This means database is not open READ/WRITE mode.
Then we can use ALTER SYSTEM ARCHIVE LOG CURRENT on the standby database.

Thanks for the interesting thread
Mr. Mahir Quluzade
http://www.Mahir-quluzade.com

RMAN alert log Message: ALTER SYSTEM ARCHIVE LOG
Creates a new database Oracle 10.2.0.4 and now see "ALTER SYSTEM ARCHIVE LOG" in the journal of the alerts that when online RMAN backup is executed:
Wed Sep 26 21:52:03 2009
ALTER SYSTEM ARCHIVE LOG
Wed Sep 26 21:52:03 2009
Thread 1 Advanced to record the sequence of 35 (switch LGWR)
Currently Journal # 2 seq # 35 mem # 0: /u01/app/oracle/oradata/aatest/redo02.log
Currently Journal # 2 seq # 35 mem # 1: /u03/oradata/aatest/redo02a.log
Wed Sep 26 21:53:37 2009
ALTER SYSTEM ARCHIVE LOG
Wed Sep 26 21:53:37 2009
Thread 1 Advanced to record the sequence of 36 (switch LGWR)
Currently Journal # 3 seq # 36 mem # 0: /u01/app/oracle/oradata/aatest/redo03.log
Currently Journal # 3 seq # 36 mem # 1: /u03/oradata/aatest/redo03a.log
Wed Sep 26 21:53:40 2009
From control autobackup
Autobackup written control disk device
handle ' / u03/exports/backups/aatest/c-2538018370-20090826-00'.

I not publish a swiitch log command. The RMAN commands, I am running are:
CONFIGURE REDUNDANCY 2 RETENTION STRATEGY;
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT for DEVICE TYPE DISK TO ' / u03/exports/backups/aatest/%F';
SET UP THE DEVICE TYPE DISK TYPE OF BACKUP TO COMPRESSED BACKUPSET;
CONFIGURE CHANNEL DEVICE TYPE DISK FORMAT ' / u03/exports/backups/aatest/%d_%U';
BACKUP DATABASE MORE ARCHIVELOG;
DELETE NOPROMPT OBSOLETE;
DELETE NOPROMPT ARCHIVELOG UNTIL ' SYSDATE-2';

I do not see this message on any other 10.2.0.4 instances. Someone has seen this and if yes why it shows in the log?

Thank you

Curt Swartzlander
There is no problem with the log command. Please refer to the documentation for more information on the syntax 'PLUS ARCHIVELOG '.

http://download.Oracle.com/docs/CD/B19306_01/backup.102/b14192/bkup003.htm#sthref377

Adding BACKUP... MORE ARCHIVELOG causes RMAN, follow these steps:

* 1. Executes the ALTER SYSTEM ARCHIVE LOG CURRENT command.*

* 2. All runs THE BACKUP ARCHIVELOG. Note that if backup optimization is enabled, then RMAN passes the newspapers that he has already saved to the specified device

* 3. Backup the rest of the files specified in BACKUP command.*

* 4. Executes the ALTER SYSTEM ARCHIVE LOG CURRENT command.*

* 5. Backup of all remaining archived logs generated during the backup.*

This ensures that backups of data taken when the command file is recoverable in a consistent state.

Query on ALTER SYSTEM SET

Hello
I was under the impression that
"PFILE has limitation to change settings for initialization of dynamically. If any initialization parameter must be changed, we can edit the pfile parameter changes take effect with the next restart of the system
To work around this limitation, Oracle has created the concept of the SPFILE initialization parameter can be changed dynamically using ALTER SYSTEM SET statement. »
But, today, I started my test using PFILE database and run the following command to change the setting of the memory_target from 300 to 290 M.
ALTER SYSTEM SET memory_target = 290 M;
And to my surprise, this statement executed correctly without errors and memory_target parameter has been set to the new value (of course, in memory).
Isn't it change the init dynamically using PFILE itself?
Please clarify my doubt and correct my understanding.
Kind regards
Bharath

bharathDBA wrote:

Hello

I was under the impression that

"PFILE has limitation to change settings for initialization of dynamically. If any initialization parameter must be changed, we can edit the pfile parameter changes take effect with the next restart of the system

To work around this limitation, Oracle has created the concept of the SPFILE initialization parameter can be changed dynamically using ALTER SYSTEM SET statement. »

But, today, I started my test using PFILE database and run the following command to change the setting of the memory_target from 300 to 290 M.

ALTER SYSTEM SET memory_target = 290 M;

And to my surprise, this statement executed correctly without errors and memory_target parameter has been set to the new value (of course, in memory).

Isn't it change the init dynamically using PFILE itself?

Please clarify my doubt and correct my understanding.

Kind regards

Bharath

You have a bad mixing on the genesis of the SPFILE. Yes, it is a binary file and all this but remember, isn't the SPFILE which makes a dynamic parameter or a PFILE that makes static, but it is the nature of the setting itself which allows to happen. Yes, the difference in the PFILE and SPFILE parameter would be obvious when you change a dynamic parameter, and would give a rebound to the db. Since the PFILE file has not been updated (it's a text file must be updated manually), with the next restart, the setting would take the same value as it has in the PFILE file. But with the SPFILE, depending on what you have set in SCOPE, the parameter should behave accordingly.

HTH

Aman...

Do we need apostrophes when you set values with ALTER SYSTEM?

DB version: 11.2, 10.2
Version: AIX

What logs the values of character with ALTER SYSTEM, do I have to enclose the value within single quotes.

Both the below worked. So I'm a bit confused.

SQL> ALTER system set audit_trail=NONE scope=spfile;

System altered.

-- Tested with single quotes on another DB
SQL> ALTER system set audit_trail='NONE' scope=spfile;

System altered.

What logs the values of character with ALTER SYSTEM, do I have to enclose the value within single quotes.

When you pass several parameters, you can use single quotes, in other cases sound option.

If you have multiple databases on hold, you must configure by separating with single quotes.
For example,.
(1) fal_client = "STBY1", "STBY2", "STBY3" and so on.
(2) log_archive_dest_2 = "service = stby lgwr async... '

If you see under SPFILE settings, here, some are mentioned with single quotes & SEC_CASE_SESITIVE_LOGIN is not in quotes. But the value is always the same.

From SPFILE;

*.remote_login_passwordfile='EXCLUSIVE'
*.sec_case_sensitive_logon=FALSE                                       "used NO QUOTES"
*.sga_max_size=16106127360
*.star_transformation_enabled='TRUE'                                        "QUOTES"

SQL> show parameter remote_login

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
remote_login_passwordfile            string      EXCLUSIVE
SQL> show parameter sec_case

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
sec_case_sensitive_logon             boolean     FALSE                                     "used NO QUOTES"
SQL> show parameter sga_max_

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
sga_max_size                         big integer 15G
SQL> show parameter star_tran

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
star_transformation_enabled          string      TRUE                                         "QUOTES"
SQL>

alter system kill session
Hello

While killing a session, I get a message like

QL > alter system kill session '802,30515' immediate;
alter system kill session '802,30515' immediate
*
ERROR on line 1:
ORA-00031: session marked for kill

I checked after a few hours again, I get the sid and the n serial form v$ session

but the status of the user of the user is as 'dead '.

SQL > select user name, session status $ v where sid = 802;

STATUS OF USER NAME
------------------------------ --------
APPS KILLED

If the session was killed or not?

Thank you
Vijay
887400 wrote:
Its Linux X 86 64-bit

But for some sessions, they will be killed immediately after alter system kill session command.,.

but in this case it is not end immediately?

What could be the cause?

Internal Oracle session remains as long as the remains of operating system processes.

Kill - 9

Since you have already issued ALTER SYSTEM KILL SESSION
You can't get the process ID of the Oracle's OS.

You can associate up to the session Oracle with OS time as evidenced by time of CONNECTION
ps - ef | LOCAL grep

UTL_FILE alter system

Hi expert,

I try to use UTL_FILE.

In the first time, I run only these commands:

SQL > CREATE DIRECTORY MIGR'EUROP AS ' / tmp/MIGR'EUROP /';
SQL > GRANT READ, WRITE ON DIRECTORY RAHUL DBA;

but to use utl_file, I am obliged to execute it "alter system set utl_file_dir =...". »

is this true? Can I not put the utl_file_dir to use UTL_FILE?

See you soon,.
Lain

oracle@mauri-laptop:/tmp/MIGR$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Thu Feb 24 16:31:25 2011

Copyright (c) 1982, 2009, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> CREATE DIRECTORY MIGR AS '/tmp/MIGR/'; 
SQL> GRANT READ, WRITE ON DIRECTORY MIGR TO DBA; 
SQL> host cat /tmp/MIGR/Report.txt
 test
SQL> DECLARE 
  V1 VARCHAR2(32767); 
  F1 UTL_FILE.FILE_TYPE; 
BEGIN 
  F1 := UTL_FILE.FOPEN('MIGR','Report.txt','R',256); 
  UTL_FILE.GET_LINE(F1,V1,32767); 
  UTL_FILE.FCLOSE(F1); 
END;
  2    3    4    5    6    7    8    9  
 10  /
DECLARE
*
ERROR at line 1:
ORA-29283: invalid file operation
ORA-06512: at "SYS.UTL_FILE", line 536
ORA-29283: invalid file operation
ORA-06512: at line 5


SQL> select * from all_directory;
select * from all_directory
              *
ERROR at line 1:
ORA-00942: table or view does not exist


SQL> select * from all_directories;

OWNER                      DIRECTORY_NAME
------------------------------ ------------------------------
DIRECTORY_PATH
--------------------------------------------------------------------------------
SYS                      MIGR
/tmp/MIGR

SYS                      SUBDIR
/u01/app/oracle/product/11.2.0/dbhome_1/demo/schema/order_entry//2002/Sep

SYS                      SS_OE_XMLDIR
/u01/app/oracle/product/11.2.0/dbhome_1/demo/schema/order_entry/


OWNER                      DIRECTORY_NAME
------------------------------ ------------------------------
DIRECTORY_PATH
--------------------------------------------------------------------------------
SYS                      LOG_FILE_DIR
/u01/app/oracle/product/11.2.0/dbhome_1/demo/schema/log/

SYS                      DATA_FILE_DIR
/u01/app/oracle/product/11.2.0/dbhome_1/demo/schema/sales_history/

SYS                      XMLDIR
/ade/b/2125410156/oracle/rdbms/xml


OWNER                      DIRECTORY_NAME
------------------------------ ------------------------------
DIRECTORY_PATH
--------------------------------------------------------------------------------
SYS                      MEDIA_DIR
/u01/app/oracle/product/11.2.0/dbhome_1/demo/schema/product_media/

SYS                      DATA_PUMP_DIR
/u01/app/oracle/admin/localdb/dpdump/

SYS                      ORACLE_OCM_CONFIG_DIR
/u01/app/oracle/product/11.2.0/dbhome_1/ccr/state


9 rows selected.

SQL> 
SQL> 
SQL> show parameter utl_file;

NAME                         TYPE      VALUE
------------------------------------ ----------- ------------------------------
utl_file_dir                    string      

SQL>
SQL> alter system set utl_file_dir='/tmp/MIGR','/u01/app/oracle/product/11.2.0/dbhome_1/MIGR/' scope=spfile
  2  ;

System altered.

SQL> 
SQL> 
SQL>       
SQL> shutdown

Database closed.
Database dismounted.

ORACLE instance shut down.
SQL> SQL> SQL> 
SQL> 
SQL> 
SQL> 
SQL> startup
ORACLE instance started.

Total System Global Area 3290345472 bytes
Fixed Size              2217832 bytes
Variable Size           1795164312 bytes
Database Buffers      1476395008 bytes
Redo Buffers             16568320 bytes
Database mounted.
Database opened.
SQL> 
SQL> show parameter utl_file

NAME                         TYPE      VALUE
------------------------------------ ----------- ------------------------------
utl_file_dir                    string      /tmp/MIGR, /u01/app/oracle/pro
                               duct/11.2.0/dbhome_1/MIGR/

SQL>
SQL> SET SERVEROUT ON

declare
v_buff VARCHAR2(2000);
fhandle UTL_FILE.FILE_TYPE;
begin
dbms_output.put_line('WRITE');
fhandle:= UTL_FILE.FOPEN('MIGR','Report.txt','W');
UTL_FILE.put_line(fhandle,' Attempt to write');
UTL_FILE.FCLOSE(fhandle);
end;
/SQL> SQL>   2    3    4    5    6    7    8    9   10  
WRITE

PL/SQL procedure successfully completed.

chmod 777/tmp/RAHUL r /.

Published by: sb92075 on February 24, 2011 08:14

ALTER system set events
Hi all

I use a 10.2.0.4 Oracle version.

My colleague trace active generation using: alter system set events 942 trace name errorstack level 3';

How will I know if it is active now? And how can I turn it off?

Kind regards
dbajug
How will I know if it is active now?

For all the events that are defined at the system level, try and check the trace file created in USER_DUMP_DEST directory:
```
alter system set events 'immediate trace name events level 4';
```
And how can I turn it off?

Try:
```
alter system set events '942 trace name errorstack off';
```

Method to identify the user isuing ALTER SYSTEM
Hi all
We have a database of test in which APPS (a power user) access is given to all developers. We had kept TIMED_STATISTIC to false in this case, so that the load is reduced to the minimum. From these last days, we change this value at the level of the system, and we are unable to identify the person.

Is there a way I can write a database trigger to capture this specific ALTER SYSTEM event? Any help in this regard is highly appreciated.

Kind regards
Lucette
Lucette wrote:
Hi Keita,
My mistake, I do not pay attention on behalf of the author. Forgive me for my doubts; they may be stupid - I'm not a DBA, but I'm a preparer SQL.

If I use audit_sys_operations - he will capture all ALTER SYSTEM orders by any user. Then narrow it down us to the test user by issuing ALTER AUDIT test SYSTEM. Please correct me if I'm wrong.

In my PB, there are at least 300 developers work at the moment - is possible to limit this information to a specific event to ALTER SYSTEM? In addition, we are in a WINDOWs environment. If cron does not work. It would be much better if I could device a method to write the details of the session incriminated at a table.

Do you think below would work?

create or replace TRIGGER UNI. USYSTEM_B_ALTER_SYS_AUDIT_TRIG
FRONT
CREATE OR CHANGE OR DROP OR TRUNCATE
ON THE SYSTEM. SCHEMA
declare
......

Kind regards
Lucette

Published by: lollipop on October 12, 2009 12:18

You don't need to set the parameter audit_sys_operations . What you need is that one specific user to AUDIT

ALTER SYSTEM SET SGA_TARGET
Hello
in 10g R2 should I power of database when I change sGA_TARGET:

ALTER SYSTEM SET SGA_TARGET = value [SCOPE = {SPFILE |}] MEMORY | BOTH}]

Thank you.
user522961 wrote:
Hello
in 10g R2 should I power of database when I change sGA_TARGET:

ALTER SYSTEM SET SGA_TARGET = value [SCOPE = {SPFILE |}] MEMORY | BOTH}]

Thank you.

You don't need to restart the database for this change.

http://download.Oracle.com/docs/CD/B19306_01/server.102/b14237/initparams193.htm

Alter system switch logfile

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