Server Administration :: Redo Log Generation?
Jul 26, 2010I have oracle 9i running on HP-UX, I would like to find how much redo we are generating in a given period of time, is there any script that I can use to get this information?
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Server Administration :: Generation Of Redo Log File
Aug 20, 2010redo generation. As I found the below statement in another forum."Undo segment generates the redo data also, because undo segment is database changes, so it generates the redo data also."
How a Undo segment can generate Redo and Undo datas.
Server Administration :: High REDO Generation?
Jan 7, 2013Redo is getting generated very high. how to find out the reason ? database kept under 2 node cluster. chcked alert log trace and log writer trace files. pasted the content as below:
--alert log trace from node1 ( node2 also has same type of message ). Archive destination disk group - TXCOM_BACKUP_01 having enough space ( 80gb )
Mon Jan 7 00:49:10 2013
Thread 1 advanced to log sequence 448546 (LGWR switch)
Current log# 1 seq# 448546 mem# 0: +TXCOM_DATA_01/txcom/onlinelog/group_1.274.785770579
Current log# 1 seq# 448546 mem# 1: +TXCOM_DATA_01/txcom/onlinelog/group_1.302.802265189
Mon Jan 7 00:49:10 2013
[code]...
In the alert log, I am able to see the archive destination disk group ( TXCOM_BACKUP_01 ) is getting DISMOUNTED and again getting MOUNTED during every archive file generation. .
Mon Jan 7 00:49:20 2013
SUCCESS: diskgroup TXCOM_BACKUP_01 was mounted
SUCCESS: diskgroup TXCOM_BACKUP_01 was dismounted
SUCCESS: diskgroup TXCOM_BACKUP_01 was mounted
SUCCESS: diskgroup TXCOM_BACKUP_01 was dismounted
archive destination parameter in both nodes are not configured. it should read diskgroup name. ( +TXCOM_BACKUP_01 ) and corresponding size limit. Should i configure this ?
SQL> show parameter db_recovery
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_recovery_file_dest string
db_recovery_file_dest_size big integer 0
[code]...
should i bring the database to mount stage and set log_archive_max_proesses to high count ? now value is 2 ( default )
Server Administration :: Access Redo Generation After Migrating From 9.2.0 To 10.2.0.4
Sep 14, 2010We had our production database hosted on Oracle 9.2.0. Few months back we have migrated it to Oracle 10.2.0.4.0. After Migration I have noticed that redo generation has become very very high. In earlier case no. of log files generating in production hours were around 30 where as after migration it become around 200 files per day. I have run statspack report on this database. Report is saying that db block change & disk write is become very high. Parameter timed_statistics has also been set to FALSE. Even then there is not any reduction on no. of log file generation. I had used import export for upgrading the databases.
View 13 Replies View RelatedPerformance Tuning :: Excess Redo Generation
Jul 1, 2010How to Find Out Which SQL Statements Causing excessive Redo generation?
View 3 Replies View RelatedReplication :: Oracle Materialized View - High Redo Generation
Nov 15, 2007I have created 5 materialize view with REFRESH FORCE option.
REFRESH is done with every 10 min.
My destination database is MySQL.
DBlink is created in ORACLE 10g
Materialize view is created using DBLINK.
Since refresh materialize view done with every 15 min, my Redo generate gone on toss.System is generating 1 redo file for 1 min. The size for redo log is 500MB.Since materialize views are created base on mysql table, system is doing complete refresh every time which causing to generate more and more redo.
Is there any setting/option/or solution to reduce high redo generation.
Server Administration :: Too Many Archive Log Generation?
Mar 16, 2012on weekends we have too many archive logs generated .i have taken the data of a week and found that average archive log generated from monday to friday is 7 files per day but on satuarday and sunday the average is 60 files and FG1 gets full. on weekends we have all type of backups running like incremental,archival and logical backups and on sunday we have full physical backup
what is the reason of too many archive log files generations at weekends. is it due to hot and logical backups , if yes then how ?
Server Administration :: Large Number Of Trace File Generation In Bdump
May 7, 2010We are facing one issue on one of the database. The database is generating large trace files(14000) from last two days. That consumes around 15G space on the disk. And the content of the trace files is not having any meaningful message to debug:
cat /apps/oracle/admin/fs90uat/bdump/fs90uat_p050_23966.trc
*** TRACE DUMP CONTINUES IN FILE /apps/oracle/admin/fs90uat/bdump/fs90uat_p050_23966.trc ***
Dump file /apps/oracle/admin/fs90uat/bdump/fs90uat_p050_23966.trc
*** TRACE DUMP CONTINUED FROM FILE /apps/oracle/admin/fs90uat/bdump/fs90uat_p050_23966.trc ***
... (Many lines with above message)
The alert log is having one repeated error yesterday:
Thu May 6 22:00:03 2010
Errors in file /apps/oracle/admin/fs90uat/bdump/fs90uat_j000_11811.trc:
ORA-12012: error on auto execute of job 2647927
ORA-04063: ORA-04063: package body "ORACLE_OCM.MGMT_DB_LL_METRICS" has errors
ORA-06508: PL/SQL: could not find program unit being called: "ORACLE_OCM.MGMT_DB_LL_METRICS"
ORA-06512: at line 1
The corresponding trace file is having error:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORACLE_HOME = /apps/oracle/product/10.2.0/db_1
System name: SunOS
Node name: corpqadb30
[Code] .......
Server Administration :: Archive Log Generation Time Interval Or Size Wise?
Oct 21, 2011i am using oracle 10g on solaris 10 os.currently archived log is generated by size wise 52 mb.i want to know whar is the best practice for archive log generation . it should be time interval or size wise.
View 1 Replies View RelatedServer Administration :: Redo Log Buffer Using?
May 27, 2011I learnt that logWriter writes in the redo log files when redo log buffer is 1/3 full, it means that 66 % of redo log buffer are always empty and never used,
if no, isn't a waste of memory (66 % always empty !)
Server Administration :: About Oracle ReDo Log Groups
May 21, 2013I've a situation where I've very less redo logs generated. Let us say 10MB. Which solution will be better ?
1. Create one redo log group about 12 MB in size.
2. Create two redo log groups about 5 MB each in size as recommended by Oracle.
Even though solution 1 is also appropriate for me because I've less redo generated than the redo log group size. My whole redo will fit in this and I can raise checkpoint forcefully after certain period of time let us say every 3 seconds.
In one of our DB I found scenario one is implemented. So I want to know pros and cons of both of these practices.
Server Administration :: Contents Of Redo Log Files
Feb 1, 2011I have some doubts about redo log files,
1) Can we fetch 'select statements' from redo log files through the use of log miner utility or any other?
(I think redo log file contains only insert,update,delete and DDL/DCL commands only)
2) If "No" to the above answer then how can i fetch all select statements fired on the system for a day or particular time.
(setting of sql_trace may be the one of them, but can it be possible for system level)
Server Administration :: Redo Log Switches In Every 3 Minutes
Oct 5, 2012Today i noticed one problem with my database,my redologs switches in every 3mins,i also noticed there is no more transaction changes happening in database but still redo switches.
Fri Oct 05 06:10:05 2012
Thread 1 advanced to log sequence 79244
Current log# 2 seq# 79244 mem# 0: D:ORADATAORACIREDO02.LOG
Fri Oct 05 06:12:16 2012
Thread 1 advanced to log sequence 79245
Current log# 1 seq# 79245 mem# 0: D:ORADATAORACIREDO01.LOG
Fri Oct 05 06:14:28 2012
[code]......
why redo switch happening,any internal problem causes redo to switch .
Server Administration :: Uncommit Change And Redo Record?
Feb 22, 2013SQL> update t set a = 1 where b = 2; -- must have redo record
2 rows updated.
SQL> rollback;
the above redo record that uncommit changed must be written from redo buffer to the online redo logfile. why Oracle write the redo record that uncommit changed to the online redo logfile ? when it will be used?
Server Administration :: Can Select Statement Generates Redo
Dec 7, 2011Whenever any transaction happen in database redo has generated for this transaction. Do select statement treat as a transaction as it doesn't modify any thing in database. And If select statement should not be a transaction, there should not be any redo generation for select statement.
So is select statement generate redo? If yes then Why ?
Server Administration :: Query On Redo And Undo Basic Concept
Nov 17, 2010understanding a redo/undo concept . Refer following data
create table t(n number);
insert into t values(10);
commit;
now I update as following
update t set n=20;
As per my understanding the before image i.e. n=10 is stored in undo (to be used for rollback, transaction recovery and even in instance recover but not in media recovery) and after image n=20 is stored in redo (to be used for various recovery purposes including media recovery in case of consistent backup).
So it is redo logs for rolling forward and undo for rolling back making transaction, db consistent . If my above understanding is true then what is meant by the term 'redo required for undo'?
Also, if there are 2 database db1 and db2 connected using database link where we are populating t1 table in db1 using t2 table in db2 using db link where redo and undo will be updated db1 or db2?
Server Administration :: Ora-00333 / Redo Log Read Error Block 203 Count 8192
Apr 17, 2010When i was starting my database .there was an error
ora-00333:redo log read error block 203 count 8192.
Server Administration :: Change Current Redo Log Size In Oracle Mount Stage
Jun 8, 2012We have one primary oracle database 10.2 and standby by database with no data guard. Initially we have 2 redo log group in primary and standby database.
We have recently add 2 more redo log and increase the size of log member from 50m to 200m in primary database. We don't have any problem in primary database.but in standby database we face a problem because we cannot open it. It always in mount stage in which . How we change the size of current redo log because we can't run. Alter system switch logfile command in mount stage.
Server Utilities :: Dump File Generation
Jan 18, 2012I have a question on export dump file generation.
select sum(bytes)/(1024*1024*1024) "GB" from dba_segments where owner='JACK';
The above select query give the output of Schema size with 15 GB. When i perform the same schema export, the dump file size generating is 2 GB. What is the difference between the two scenarios as how come there could be a variation in file size?
Server Utilities :: Dynamic Control File Generation In WINDOWS Environment?
Jul 23, 2010I am trying to generate dynamic control file, as the files I want to upload are coming from different source and their name is constantly changing but following a fix pattern and naming convention.
I am able to generate dynamic control file through SQL. But while calling from BATCH file, i am unable to sent the file name as parameter.
All the examples i have searched are for UNIX, how to do it with BATCH File in WINDOWS.
Hash Value Generation
Aug 21, 2012I have a question.
When and Where HASH VALUE for a given SQL statement get generated?
SQL & PL/SQL :: Column To Row Generation
Jul 18, 2013Here i've a case of, For single test there are multiple chemist's assigned to it. I want a result for each chemist assigned how many test.
I want the output like below.
CREATE TABLE SAM.TEMP
(
ID NUMBER(4),
CHEMIST_ID VARCHAR2(30)
)
/
[Code]....
SQL & PL/SQL :: Auto Generation Of Number
Feb 27, 2013Need to generate auto number as below
A00001 to A99999. After A99999 it should begin with B00001 and ends with B99999. till Z99999 we need to generate.
SQL & PL/SQL :: Letter Generation In Word?
Jul 2, 2012i need to write to word doc from pl/sql . these are letters which needs to printed . Can i use the same UTL_FILE and will i be able to control the font etc from pl/sql
View 6 Replies View RelatedSQL & PL/SQL :: Sequence Number Generation
Jul 26, 2010I am using following Procedure/function for inserting DATA into New table:
PROCEDURE NEMPID IS
OFFICER CHAR(1) := '0';
OFFICIAL CHAR(1) := '9';
CURSOR DOJSUP IS
[Code]....
Get/Retrieved data from personal and cat9 files and Inserted Data stored in file NEMP as
EMP_ID NEMP_ID
------- ---------
111 01-8722
132 01-9224
88 01-8318
114 01-8717
106 01-8517
[Code]....
I want also generate a sequence/serial number for same category/designation of personals/employees exist in personal file ?
Like 001, 002 ,003 at the end of NEMPID field.
EMP_ID NEMP_ID
------- ---------
111 01-8722-001
132 01-9224-002
88 01-8318-003
114 01-8717-004
[Code]....
HOW CAN GENERATE SEQUENCE/SERIAL NUMBER OF SAME CATEGORY EMPLOYEES AND INSERT INTO TABLE NEMP?
PL/SQL :: File Number Generation
May 15, 2013Here is my situation.
1. I generate file_name through a function.
2. File name like File_DD_MM_YY_FLXXX.
3. Now this FLXXX is the filenumber. It will be 1 for the 1st run of the day and for each of the new run it will be +1. Again next day it will start from 1.
So right now I am using a sequence and resetting it at 12 AM to 0. Is it a good approach to solve the scenario?
Too Much Archivelog Generation In 11gr2?
Sep 25, 201311gr2, HP-UX, 64-bit. From last one week, we are seeing tremendous increase in archive-log growth. Its comes almost around 110GB per a day (db size=600g). I don't think its usual.Alertlog is clean and we don't see any alerts. Remedy app is built on this db and its creating tables on fly with LOB columns and indexes on them. As a first step. shall I disable logging for indexes on LOB columns ?
View 4 Replies View RelatedCharacter Report Generation Too Slow
Oct 12, 2010I am using :
Database : Oracle 8i
Application Server: Oracle AS 9i
Developer Suite : Oracle 6i(forms & reports)
I have created some character reports in oracle reports 6i.. when reports used run from my ERP(oracle 6i oriented) ... report usually took time to create on server. Sometimes my ERP used to hang up due to busy reports generation. And then we have to kill some processes to finally create charater reports on emergency basis.What is the valid reason for slow generation of report(character file )?
Forms :: Invoice Number Generation?
Aug 24, 2011i an using this code to generate invoice numbers auntomatically:
declare
po number;
pi number;
begin
[code]...
Problem is it does not increment after 10.
Forms :: Barcode Generation And Printing
Dec 14, 2011We need to generate barcode through oracle forms and print the barcode using Zebra Printer.
How to generate the barcode using oracle forms and which software we should use to generate the barcode as well as how can we print the barcode label with customize information on label with barcode.