Server Administration :: Data Block Corruption
May 12, 20111) What is PHYSICAL/LOGICAL Corruption.
2) How it occurs.
3) Will RMAN works on both the types of corruption or only Physical (My senior told it works on both).
ADVERTISEMENT
Server Administration :: Block Corruption - Segment Not Found
May 16, 2012I have a database where view v$database_block_corruption shows a corrupted block
SQL> select * from v$database_block_corruption;
FILE# BLOCK# BLOCKS CORRUPTION_CHANGE# CORRUPTIO
---------- ---------- ---------- ------------------ ---------
4 756652 1 5.5157E+12 CORRUPT
I am not able to get the relevant segment from the above information
SQL> select segment_name, segment_type, owner
2 from dba_extents
3 where file_id = 4
4 and 756652 between block_id
5 and block_id + blocks -1;
no rows selected
DBVERIFY Summary
DBVERIFY - Verification complete
Total Pages Examined : 3932160
Total Pages Processed (Data) : 3119107
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 755048
[code]....
I have uploaded the complete logfile.
Below is a part of logfile
DBVERIFY - Verification starting : FILE = /prd/dvp/ora/oradata/LHF/disk06/gds_t01_01.dbf
Block Checking: DBA = 21728172, Block Type = KTB-managed data block
**** kdxcoavs = -84 < 0, avail = 3129
---- end index block validation
Page 756652 failed with check code 6401
##not here that 756652 is the same block# mentioned in v$database_block_corruption
here i tried finding the OBJECT ID as below
SELECT dbms_utility.data_block_address_block(21728172) "BLOCK", dbms_utility.data_block_address_file(21728172) "FILE" FROM dual;
BLOCK FILE
---------- ----------
756652 5
Now for the same BLOCK it is giving different File, again the segment_name or segment_id could not be found from the above information.
Backup & Recovery :: Ora-01578 - Oracle Data Block Corruption
Jun 24, 2013We are facing block corruption error and it's refer to system datafile (SYSTEM01.DBF).Below is the script through it, we can come to know about the extent.
select segment_name, segment_type from dba_extents
where file_id=1 and 134144 between block_id and block_id+blocks-1;
select owner,index_name,index_type, table_name from dba_indexes
where index_name='I_CDEF3';
How to resolve the problem as it is related to system datafile? We tried to drop the index but system is not allowing to do.
ORA-00701 - object necessary for warmstarting database cannot be altered.
Server Administration :: Ora / 1043 User Side Memory Corruption
Nov 20, 2002I'm using Oracle8i, with VB6 as front end When i try to connect Oracle using RDO in VB i get an error message from Oracle It is S1000:Oracle ODBC.ora Ora:1043 User Side Memory Corruption.
View 11 Replies View RelatedServer Administration :: ORA-01578 - ORACLE Data Block Corrupted
Sep 4, 2012I am having 3 oracle database instances running on 3 seperate Linux Node(RHEL Node).
Instance -1 named - DS
Instance -2 named - MIS
Instance -3 named - OAS
Among of these 3 nodes, we are facing Block Corruption issues with sysaux tablespace.Error in Instance name DS is
Errors in file /u01/home/dba/oracle/diag/rdbms/ds4db/DS/trace/DS_j000_655388.trc (incident=300847):
ORA-01578: ORACLE data block corrupted (file # 2, block # 38428)
ORA-01110: data file 2: '/DSdb1/dssysaux.dbf'
ORA-26040: Data block was loaded using the NOLOGGING option
GATHER_STATS_JOB encountered errors. Check the trace file.
[code]....
for this I googled and found some solution as oracle doc [430230.1] related to sysaux couruption.After this again we are facing the same issue in sysaux tablespace.
Possible To Recover BLOCK Corruption With Exp Backups
Jul 9, 2013While taking a full export i came to know there was a block corruption in SYSAUX tablespace. I dont have any COLD/HOTBACKUPS/RMAN BACKUPS. As i have only the Exp backups and the database is in archive log mode. Whether is it possible to recover the BLOCK CORRUPTION with exp backups.
View 12 Replies View RelatedBackup & Recovery :: Block Corruption In Expdp?
Feb 15, 2011I am facing issue of block corruption in my exp backup which I am taking through expdp command. (Refer Attachment of Screen shot of error)
I want to know few things about the block corruption.
1. Why the block corruption occur.
2. How can I resolve this.
3. Can I rosolve this by deleting the same record on which this error is coming. if yes then how can I track that row in a table.
I already tried for DB verify utility. It shows the below result.
===================================================================
C:Documents and SettingsAdministrator>dbv file='E:ORADATAAFCCV1MONETA01.DBF' blocksize=8192
DBVERIFY: Release 11.1.0.6.0 - Production on Wed Feb 16 10:13:11 2011
Copyright (c) 1982, 2007, Oracle. All rights reserved.
DBVERIFY - Verification starting : FILE = E:ORADATAAFCCV1MONETA01.DBF
DBV-00600: Fatal Error - [28] [27070] [0] [0]
C:Documents and SettingsAdministrator>
================================================================
Backup & Recovery :: How To Find Corruption Block
Jun 9, 2012how to find the corruption block and judge whether it is physical corruption or logical corruption?
View 3 Replies View RelatedReplication :: Block Corruption While Accessing Some Table
Mar 16, 2011The database is running in archivelog mode and we have a standby with Maximum performance.There is no RMAN backup..We have noticed there is block corruption while accessing some tables.Now i would like to know are the corrupted blocks also replicated to the physical standby? Is there a way to recover the data from these corrupted blocks without shutting down the database ?
View 1 Replies View RelatedBackup & Recovery :: Block Corruption In System Datafile?
Dec 25, 2011I have noticed a block corruption issue in my RAC database. Its an index , how to recover a corrupted index in system datafile.
SELECT tablespace_name, segment_type, owner, segment_name
FROM dba_extents WHERE file_id = 5
3 and 147551 between block_id AND block_id + blocks - 1;
TABLESPACE_NAME SEGMENT_TYPE OWNER
[code]....
We are using OCFS2 and O/S is RHEL 4.7.
Server Administration :: ORA-00607 / Internal Error Occurred While Making A Change To A Data Block
Mar 12, 2010Error is occurred during the transaction...i.e.
ORA-00607: Internal error occurred while making a change to a data block
ORA-00600: internal error code, arguments: [4194], [89], [83], [], [], [], [], []
Backup & Recovery :: Logical Block Corruption - Recreate SYSMAN Schema Index
Mar 3, 2010I am facing problem of logical block curruption.
SQL> select * from v$database_block_corruption;
FILE# BLOCK# BLOCKS CORRUPTION_CHANGE# CORRUPTIO
---------- ---------- ---------- ------------------ ---------
3 61454 1 1417157166 LOGICAL
3 31256 1 1417011117 LOGICAL
OWNER CONSTRAINT_NAME C TABLE_NAME
------------------------------ ------------------------------ - ------------------------------
SYSMAN MGMT_METRICS_RAW_PK P MGMT_METRICS_RAW
Can i recreate the SYSMAN schema index by dropping this one?
SQL & PL/SQL :: DB Locks And Data Corruption?
Feb 25, 2012I have a sql script where triggers, procedures and functions are written. The triggers are causing db outages and causing problems in the application as well.
I am trying my best but with my low experience and expertise, am not able to make good progress.
Scenario: Course enrollments are inserted, deleted and updated in course_main and course_users table. This is done in gui as well as in background snapshot scheduler in a cron process. Course_main table contains all course enrollments and course_users table has crsmain_pk1 as foreign key.
Its quite a big file and am not sure what should i paste here so am uploading the file in txt.
Server Administration :: Location Of A DB Block?
Feb 7, 2011) How to find out, whether my Query return the output from the block of BUFFER CACHE or from DATAFILES?
2) How to calculate the no of data blocks were used to return a single output.
Server Administration :: Non Standard Block Size
Aug 15, 2011I am using oracle 10g with sga_max_size =4GB and db block size 16k. Now i am creating a tablespace with block size 32 kb , whats value i select for the parameter db_32k_cache_size.
Is there any standard way to calculate the value of this parameter.
Server Administration :: How To Get Number Of Empty Block
Mar 31, 2012①SQL> SELECT OBJECT_ID FROM DBA_OBJECTS WHERE OBJECT_NAME='T2012';
OBJECT_ID
---------
57082
②SQL> SELECT HEADER_BLOCK,BLOCKS FROM DBA_SEGMENTS WHERE SEGMENT_NAME = 'T2012';
HEADER_BLOCK BLOCKS
------------- --------
683 8
③SQL> SELECT DBMS_ROWID.rowid_block_number(ROWID)USED_BLOCK_NUMBER FROM SCOTT.T2012;
USED_BLOCK_NUMBER
----------------
684
④SQL> SHUTDOWN IMMEDIATE;
⑤SQL> STARTUP;
⑥SQL> SELECT BLOCK#,CLASS# FROM V$BH WHERE OBJD = '57082';
no data found
⑦SQL> SELECT * FROM SCOTT.T2012;
ID
-----
1
⑧SQL> SELECT BLOCK#,CLASS# FROM V$BH WHERE OBJD='57082';
BLOCK# CLASS#
------- ----------
686 1
684 1
687 1
685 1
688 1
683 4
⑨SQL> SELECT EMPTY_BLOCKS FROM DBA_TABLES WHERE TABLE_NAME='T2012';
EMPTY_BLOCKS
------------
3
QUESTIONS ONE:
in the ⑧ step,why block#685,block#686,block#687,block#688 in the buffer cache after i query data from scott.T2012?
QUESTIONS TWO:
in the ⑨ step,what's the block number of the empty block?just like DBMS_ROWID.ROWID_BLOCK_NUMBER(ROWID).
Server Administration :: Calculate Used Space In A Block
Nov 17, 2011Is there any way I can calculate percentage of space used in a block.Eg if a table size is 100 blocks,How Can I check the percentage of used space in block.
View 6 Replies View RelatedServer Administration :: How To Know Which Block Contains Free Space
Feb 26, 2013for some reason,i want to know which data block contains free space,or which table/index contains free space.
View 6 Replies View RelatedServer Administration :: Status Of Anonymous Block Program?
Jan 4, 2012One of our developers team member had created a Anonymous block program to do something in the Database, and he forgotten and terminated the session without confirming the program's status, whether it was fully ran or not.
Is there any way to check out the status of this, which happened yesterday?
Server Administration :: Specifying Nonstandard Block Sizes For Tablespaces?
Jan 6, 2011We are creating non standard blocking size for 16k and so accordingly have to set the parameter db_16k_cache_size.
if have any thumb rule for setting the value for this parameter.
Server Administration :: Fractured Block During Buffer Read?
Nov 17, 2011I am in charge of several instances located on a Linux server CentOS, virtualized on a ESX 3.5 environment.
From time to time (every 4 to 5 days), I have some errors in the alert.log. Last occurence was last night :
Corrupt block relative dba: 0x01004e12 (file 4, block 19986)
Fractured block found during buffer read
Data in bad block:
type: 6 format: 2 rdba: 0x01004e12
last change scn: 0x0000.131aaa5b seq: 0x2 flg: 0x04
[Code] ........
We are doing user manual backup (with BEGIN/END BACKUP) every night at 8PM, ending at 9PM approx. Then, fractured blocks never occur during backups. At 1AM, the maintenance window is opening, thus explaining the GATHER_STATS_JOB job.
When I check corruption on early morning, I am always unable to reproduce the problem. DBV is OK without issues. We never had a problem with the data itself, whatever it is a table or an index in the reported failed block.
I would like to know what could cause these logical corruption, and how to stop them ?
Server Administration :: Control File And Database Block Size?
Oct 24, 2011SQL> select block_size from v$controlfile;
BLOCK_SIZE
----------
16384
SQL> show parameter db_block_size;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_block_size integer 8192
the 2 can have difference block size?
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 :: ORA-04030 - Split From Tablespace With Different Block Size Inside Same Database
Nov 26, 2011i written this code i m facing ORA-04030: out of process memory when trying to allocate 16408 bytes error
/* Formatted on 2011/11/26 11:52 (Formatter Plus v4.8. */
DECLARE
row_id varchar2(50);
v_batch_id temp.batch_id%TYPE;
v_slab_id temp.slab_id%TYPE;
flag NUMBER (2);
num varchar2(50) := &row_id;
[code].....
Server Administration :: Multi-block Disk Reads For Index Range Scans?
Aug 31, 2010My understanding of DB_FILE_MULTIBLOCK_READ_COUNT parameter is that it affects only Full Table Scans and Fast Full Index Scans - all other disk retrieval is single block.If so, then maybe I'm reading this trace incorrectly:
select /*+ first_rows */ pk
from test_join_tgt
where pk >= 0
and rownum > 1
call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ---------- ----------
Parse 1 0.01 0.00 0 0 0 0
Execute 1 0.00 0.00 0 0 0 0
Fetch 1 21.48 27.77 22368 22134 0 0
------- ------ -------- ---------- ---------- ---------- ---------- ----------
total 3 21.49 27.78 22368 22134 0 0
[code]...
What the heck is going on with the Multi-block reads in the Range Scan?
Forms :: Multi Data Block And Checkbox Field Based On Control Block
Nov 19, 2010i have multi data block filed. and checkbox field which based on control block...My task is when i check checkbox only one field should enabled and my mouse goes to that field
e.g
item11 item21 item31 chkbox1
item12 item22 item32 chkbox2
Scenario like this :
My item field based on data block and checkbox based on control block,while i checked chkbox1 , only item31 on that current record should be enabled and i changed value only on that field
when i checked chkbox1 , my cursor goes to item31...not item32
Server Administration :: Move Partitioned Table Between Table Spaces Of Different Block Size?
Apr 4, 2011I was about to move some tables from one table space to another but it seems it is not possible to move partitioned tables between table spaces of different block sizes.
So far the only option I have is to export and then import back the data.
know if there is any way to move a partitioned table between table spaces of different block size?
Server Administration :: Moving 10 GB Data To 200 GB Database Server
Jun 22, 2011We have an Oracle Server database of Size 50 GB having 10 GB Data. And Planning to have a new Database Server of 200GB . So my question is after moving all the 10 GB data to 200 GB Database Server, will the performance of the system come down? Will it reduce the speed?
View 9 Replies View RelatedServer Administration :: Data Refresh Between 8i And 11g?
Mar 19, 2012The developer team wants to test their application. For the same they need some data which resides at oracle 8i instance. However they are not able to create a dblink between 11g and 8i as this is not supported by oracle.
Now they want the data to be refreshed from 8i to 11g by exp/imp.
Apart from exp and imp is there is any other alternatives?
Server Administration :: RAW Data-type?
Apr 3, 2013RAW datatype in oracle,any problems we will face using this datatype,Reason is we have column which stores session id in RAW datatype using sys_guid, drawbacks in using this datatype.
View 5 Replies View Related