Re: ERROR: SAVE Undo Block Corrupted. Error Code = 50
Date: Fri, 11 Jul 2014 11:15:36 -0500
Message-ID: <CAKoJ+qD=E=UYoongf6zKWZ8f5v-daarZEhVwLm_4eoEFA7i7mA_at_mail.gmail.com>
Hi Riyaj,
Below is the out, seems like query#2 has some error
SQL> show parameter db_block_size;
NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ db_block_size integer 8192 SQL> SELECT DISTINCT f.file_id, 2 f.block_id, 3 f.bytes, 4 f.blocks
5 FROM dba_free_space f
6 JOIN v$database_block_corruption c ON (c.block# BETWEEN f.block_id AND f.block_id + f.blocks -1
AND f.file_id =c.file#)
7 8 WHERE f.file_id=1;
FILE_ID BLOCK_ID BYTES BLOCKS ---------- ---------- ---------- ----------
1 12556 65536 8
1 12568 262144 32
1 12866 1196032 146
1 12714 1015808 124
1 14412 65536 8
1 12612 458752 56
6 rows selected.
SQL> SELECT count(*)
2 FROM dba_free_space f2
3 WHERE f2.blocks IN
4 (SELECT DISTINCT f.file_id,
5 f.block_id,
6 f.bytes,
7 f.blocks
8 FROM dba_free_space f
9 JOIN v$database_block_corruption c ON (c.block# BETWEEN
f.block_id AND f.block_id + f.blocks -1
10 AND f.file_id =c.file#)
WHERE f.file_id=1) where f2.file_id=1; 11
WHERE f.file_id=1) where f2.file_id=1
*
ERROR at line 11:
ORA-00933: SQL command not properly ended
SQL> On Fri, Jul 11, 2014 at 10:44 AM, Riyaj Shamsudeen < riyaj.shamsudeen_at_gmail.com> wrote:
> Hi
> Can you send me the output of the following queries? I am trying to
> figure out, how many free extents these blocks are spread around? and then,
> how many free extents have the same size? If we know this, may be, we can
> allocate extents of that size exactly and hopefully reuse those blocks. If
> there are many extents, then, you may be better off, rebuild database with
> transportable tablespace option or (expdp/impdp if the database size is
> small).
>
> BTW, this method is not too different from that note you have posted,
> however, there are subtle differences.
>
> (typo possible in the queries, as I have not tested them).
>
> select distinct f.file_id, f.block_id, f.bytes, f.blocks
> from dba_free_space f join v$database_block_corruption c
> on (c.block# between f.block_id and f.block_id + f.blocks -1
> and f.file_id =c.file#)
> where f.file_id=1
> /
>
> select count(*) from dba_free_space f2
> where f2.blocks in (
> select distinct f.file_id, f.block_id, f.bytes, f.blocks
> from dba_free_space f join v$database_block_corruption c
> on (c.block# between f.block_id and f.block_id + f.blocks -1
> and f.file_id =c.file#)
> where f.file_id=1
> )
> where f2.file_id=1
> /
> show parameter db_block_size
>
>
>
>
> Cheers
>
> Riyaj Shamsudeen
> Principal DBA,
> Ora!nternals - http://www.orainternals.com - Specialists in Performance,
> RAC and EBS
> Blog: http://orainternals.wordpress.com/
> Oracle ACE Director and OakTable member <http://www.oaktable.com/>
>
> Co-author of the books: Expert Oracle Practices
> <http://tinyurl.com/book-expert-oracle-practices/>, Pro Oracle SQL,
> <http://tinyurl.com/ahpvms8> <http://tinyurl.com/ahpvms8>Expert RAC
> Practices 12c. <http://tinyurl.com/expert-rac-12c> Expert PL/SQL practices
> <http://tinyurl.com/book-expert-plsql-practices>
>
> <http://tinyurl.com/book-expert-plsql-practices>
>
>
>
> On Fri, Jul 11, 2014 at 6:46 AM, max scalf <oracle.blog3_at_gmail.com> wrote:
>
>> Hello list,
>>
>> I might have a interesting error at hand, Please note i already have
>> opened a ticket with oracle, but not getting good enough response. We
>> started doing RMAN backup of one of our system(backup check logical
>> database...) and found that there is some corruption on the system
>> datafile. When i ran DBV i get the below errors and DBV also says "Total
>> Pages Marked Corrupt : 0". We do not know how long this corruption has
>> been in our system as we recently started doing RMAN backup on it and that
>> failed on FIRST day of our backup.
>>
>> Selecting out of v$database_block_corruption show we have about 43 blocks
>> thats are corrupted and CORRUPTION_TYPE is UNKNOWN and when i try to find
>> out which segments are affected. They are all empty blocks.
>>
>> Oracle answer was "We have no other options or workarounds other than
>> rebuilding this database, or setting the maxcorrupt clause for that
>> datafile"
>>
>> i supposed i can live with setting up maxcorrupt caluse i our backup
>> script, but what worries me the most is that this is datafile#1(system
>> datafile).
>>
>> i tried following this note "How to Format Corrupted Block Not Part of
>> Any Segment (Doc ID 336133.1)" but that dose not seem to help, and there is
>> a big DISCLAIMER that says :-The steps given in this note are not always
>> guaranteed to work.
>>
>> Also the below error on DBV are something i could not find anything on
>> oracle support or google. Oracle version is 10.2.0.5 and do note this is a
>> dictionary manage tablespace. One more wierd part about this error. When
>> i run "backup validate check logical datafile 1", in the alert log we get
>> error pointing to datafile# 16. DBV on that datafile dose not produce any
>> error(also ran backup validate check logical datafile 16 followed by select
>> on v$database_block_corruption and no errors there), this datafile 16 is
>> part of a tablespace that is also dictionary managed tablespace. This DB
>> has multiple tablespace, half of them locally managed and half dictionary
>> managed(back from 8i incarnation of this database).
>>
>> Error backing up file 16, block 12557: logical corruption
>> Error backing up file 16, block 12561: logical corruption
>> Error backing up file 16, block 12589: logical corruption
>> Error backing up file 16, block 12593: logical corruption
>>
>>
>> So my question is how do i get rid of this? Is there a way to insert
>> rows into a specific block, so that it can be reformatted ? I have also
>> attached output.txt file of DBV and select on v$database_block_corruption
>> for better readability(in case needed by someone).
>>
>>
>> $ dbv file=/oracle/SID/system_1/system.data1
>>
>> DBVERIFY: Release 10.2.0.5.0 - Production on Fri Jul 11 08:04:18 2014
>>
>> Copyright (c) 1982, 2007, Oracle. All rights reserved.
>>
>> DBVERIFY - Verification starting : FILE =
>> /oracle/SID/system_1/system.data1
>> Block Checking: DBA = 67121421, Block Type = Save undo data block
>> ERROR: SAVE Undo Block Corrupted. Error Code = 50
>> kts4subck: record (3) seq# (0), split flag (0)
>> and total pieces(0)
>> Block Checking: DBA = 67121425, Block Type = Save undo data block
>> ERROR: SAVE Undo Block Corrupted. Error Code = 50
>> kts4subck: record (3) seq# (0), split flag (0)
>> and total pieces(0)
>> Block Checking: DBA = 67121453, Block Type = Save undo data block
>> ERROR: SAVE Undo Block Corrupted. Error Code = 50
>> kts4subck: record (3) seq# (0), split flag (0)
>> and total pieces(0)
>> ........
>> ........
>> ........ ====> Same as above errors
>> ........
>>
>> DBVERIFY - Verification complete
>>
>> Total Pages Examined : 32000
>> Total Pages Processed (Data) : 17136
>> Total Pages Failing (Data) : 0
>> Total Pages Processed (Index): 13619
>> Total Pages Failing (Index): 0
>> Total Pages Processed (Other): 1215
>> Total Pages Processed (Seg) : 1
>> Total Pages Failing (Seg) : 0
>> Total Pages Empty : 30
>> Total Pages Marked Corrupt : 0
>> Total Pages Influx : 0
>> Highest block SCN : 2826666056 (458.2826666056)
>> $
>>
>> SQL> select * from v$database_block_corruption order by 1,2,3,4
>> 2 ;
>>
>> FILE# BLOCK# BLOCKS CORRUPTION_CHANGE# CORRUPTIO
>> ----- ------ ------ ------------------ ---------
>> 1 12557 1 1 UNKNOWN
>> 1 12561 1 1 UNKNOWN
>> 1 12589 1 1 UNKNOWN
>> 1 12593 1 1 UNKNOWN
>> 1 12597 1 1 UNKNOWN
>> 1 12665 1 1 UNKNOWN
>> 1 12667 1 1 UNKNOWN
>> 1 12715 1 1 UNKNOWN
>> 1 12719 1 1 UNKNOWN
>> 1 12723 1 1 UNKNOWN
>> 1 12727 1 1 UNKNOWN
>> 1 12731 1 1 UNKNOWN
>> 1 12735 1 1 UNKNOWN
>> 1 12739 1 1 UNKNOWN
>> 1 12743 1 1 UNKNOWN
>> 1 12747 1 1 UNKNOWN
>> 1 12751 1 1 UNKNOWN
>> 1 12755 1 1 UNKNOWN
>> 1 12759 1 1 UNKNOWN
>> 1 12763 1 1 UNKNOWN
>> 1 12767 1 1 UNKNOWN
>> 1 12771 1 1 UNKNOWN
>> 1 12775 1 1 UNKNOWN
>> 1 12779 1 1 UNKNOWN
>> 1 12783 1 1 UNKNOWN
>> 1 12787 1 1 UNKNOWN
>> 1 12791 1 1 UNKNOWN
>> 1 12795 1 1 UNKNOWN
>> 1 12799 1 1 UNKNOWN
>> 1 12803 1 1 UNKNOWN
>> 1 12807 1 1 UNKNOWN
>> 1 12811 1 1 UNKNOWN
>> 1 12815 1 1 UNKNOWN
>> 1 12819 1 1 UNKNOWN
>> 1 12823 1 1 UNKNOWN
>> 1 12827 1 1 UNKNOWN
>> 1 12831 1 1 UNKNOWN
>> 1 12835 1 1 UNKNOWN
>> 1 12999 1 1 UNKNOWN
>> 1 13003 1 1 UNKNOWN
>> 1 13007 1 1 UNKNOWN
>> 1 13011 1 1 UNKNOWN
>> 1 14413 4 1 UNKNOWN
>>
>> 43 rows selected.
>>
>> SQL>
>>
>> SQL> SELECT e.owner, e.segment_type, e.segment_name, e.partition_name,
>> c.file#
>> 2 , greatest(e.block_id, c.block#) s_blk#
>> 3 , least(e.block_id+e.blocks-1, c.block#+c.blocks-1) e_dblk#
>> 4 , least(e.block_id+e.blocks-1, c.block#+c.blocks-1)
>> 5 - greatest(e.block_id, c.block#) + 1 blk_corrupt
>> 6 , null description
>> 7 FROM dba_extents e, v$database_block_corruption c
>> 8 WHERE e.file_id = c.file#
>> 9 AND e.block_id <= c.block# + c.blocks - 1 AND e.block_id + e.blocks
>> - 1 >= c.block#
>> 10 UNION
>> 11 SELECT s.owner, s.segment_type, s.segment_name, s.partition_name,
>> c.file#
>> 12 , header_block s_blk#
>> 13 , header_block e_blk#
>> , 1 blk_corrupt
>> 14 15 , 'Segment Header' description
>> 16 FROM dba_segments s, v$database_block_corruption c
>> WHERE s.header_file = c.file#
>> AND s.header_block between c.block# and c.block# + c.blocks - 1
>> 17 18 19 UNION
>> 20 SELECT null owner, null segment_type, null segment_name, null
>> partition_name, c.file#
>> 21 , greatest(f.block_id, c.block#) s_blk#
>> 22 , least(f.block_id+f.blocks-1, c.block#+c.blocks-1) e_blk#
>> , least(f.block_id+f.blocks-1, c.block#+c.blocks-1)
>> 23 24 - greatest(f.block_id, c.block#) + 1 blk_corrupt
>> , 'Free Block' description
>> 25 26 FROM dba_free_space f, v$database_block_corruption c
>> 27 WHERE f.file_id = c.file#
>> AND f.block_id <= c.block# + c.blocks - 1 AND f.block_id + f.blocks - 1
>> >= c.block#
>> 28 29 order by file#, s_blk#
>> 30 ;
>>
>> OWNER SEGMENT_TYPE SEGMENT_NAME
>> PARTITION_NAME FILE# S_BLK# E_DBLK# BLK_CORRUPT DESCRIPTION
>> -------------------- ------------------ -------------------------
>> ------------------------- ----- ------ ---------- ----------- --------------
>>
>> 1 12557 12557 1 Free Block
>>
>> 1 12561 12561 1 Free Block
>>
>> 1 12589 12589 1 Free Block
>>
>> 1 12593 12593 1 Free Block
>>
>> 1 12597 12597 1 Free Block
>>
>> 1 12665 12665 1 Free Block
>>
>> 1 12667 12667 1 Free Block
>>
>> 1 12715 12715 1 Free Block
>>
>> 1 12719 12719 1 Free Block
>>
>> 1 12723 12723 1 Free Block
>>
>> 1 12727 12727 1 Free Block
>>
>> 1 12731 12731 1 Free Block
>>
>> 1 12735 12735 1 Free Block
>>
>> 1 12739 12739 1 Free Block
>>
>> 1 12743 12743 1 Free Block
>>
>> 1 12747 12747 1 Free Block
>>
>> 1 12751 12751 1 Free Block
>>
>> 1 12755 12755 1 Free Block
>>
>> 1 12759 12759 1 Free Block
>>
>> 1 12763 12763 1 Free Block
>>
>> 1 12767 12767 1 Free Block
>>
>> 1 12771 12771 1 Free Block
>>
>> 1 12775 12775 1 Free Block
>>
>> 1 12779 12779 1 Free Block
>>
>> 1 12783 12783 1 Free Block
>>
>> 1 12787 12787 1 Free Block
>>
>> 1 12791 12791 1 Free Block
>>
>> 1 12795 12795 1 Free Block
>>
>> 1 12799 12799 1 Free Block
>>
>> 1 12803 12803 1 Free Block
>>
>> 1 12807 12807 1 Free Block
>>
>> 1 12811 12811 1 Free Block
>>
>> 1 12815 12815 1 Free Block
>>
>> 1 12819 12819 1 Free Block
>>
>> 1 12823 12823 1 Free Block
>>
>> 1 12827 12827 1 Free Block
>>
>> 1 12831 12831 1 Free Block
>>
>> 1 12835 12835 1 Free Block
>>
>> 1 12999 12999 1 Free Block
>>
>> 1 13003 13003 1 Free Block
>>
>> 1 13007 13007 1 Free Block
>>
>> 1 13011 13011 1 Free Block
>>
>> 1 14413 14416 4 Free Block
>>
>> 43 rows selected.
>>
>> SQL>
>>
>>
>>
>
-- http://www.freelists.org/webpage/oracle-lReceived on Fri Jul 11 2014 - 18:15:36 CEST