coalesce

Coalescing the tablespace will NEVER increase the the amount of free space.

It is used on dictionary managed tablespaces to coalesce two or more adjacent FREE extents into one - it will NOT create new free ones.

DP RMAN Script for Archivelog backup

DP-RMAN Script for Archivelog backup

run
{allocate channel 'dev_0' type 'sbt_tape'
parms 'ENV=(OB2BARTYPE=Oracle8,OB2APPNAME=Database,OB2BARLIST=Server_Database_RMAN_ARC_ST_RA)'; sql 'alter system switch logfile';
crosscheck archivelog all;
backup format 'Server_Database_RMAN_ARC_ST_RA.arc'
archivelog all delete input;
}

*Crosscheck archivelog all was added to avoid backup failure due to missing archive files.

Ora-1461 Encountered When Generating Server Alert Smg-3500

1. To fix these Bug 6085625 and unpublished bug 6452485, The fixes for these two bugs are now available as Patch 6602742 or Patch 6602482 .

2. Workaround
A. Flushing the shared pool can help remove the problem cursor from the shared pool.
B. Using SESSION_CACHED_CURSORS = 0

Snapshot Purging

Recently we had to purge the snapshot as we were getting threshold alert. But Purging did not brought down the usage. Inorder to reduce threshold we had to resize the datafile of the perfstat.



When sppurge.sql is executed, all available snapshots are displayed and prompts for losnapid (low snap id ) & hisnapid (hi snap id). All snapshots between these will be deleted.




Purging requires large rollback segment. Commit command or exiting from sql will automatically commit the purging.




You can set the transaction to use particular rollback segment. Also exporting perfstat schema will ideal before purging, truncation or dropping.



SQL> @$ORACLE_HOME/rdbms/admin/sppurge




SQL > delete from stats$snapshot where snap_id <>


SQL > delete from stats$sql_summary where snap_time <>


Batch file


#!/bin/ksh

ORACLE_SID=$1

export ORACLE_SID

ORACLE_HOME=`cat /etc/oratabgrep ^$ORACLE_SID:cut -f2 -d':'

`export ORACLE_HOME

PATH=$ORACLE_HOME/bin:$PATH

export PATH

$ORACLE_HOME/bin/sqlplus system/manager<

select * from v$database;

connect perfstat/perfstat

define losnapid=$2

define hisnapid=$3

@sppurge

exit!

DICTIONARY VIEWS

DBA Views
SQL> SELECT * FROM DICT WHERE TABLE_NAME LIKE 'DBA_%' ORDER BY TABLE_NAME;
Dynamic views
SELECT * FROM DICT WHERE TABLE_NAME LIKE 'V$%' ORDER BY TABLE_NAME
All views
SQL> SELECT * FROM DICT WHERE TABLE_NAME LIKE 'ALL_%' ORDER BY TABLE_NAME;
User views
SQL> SELECT * FROM DICT WHERE TABLE_NAME LIKE 'USER_%' ORDER BY TABLE_NAME;

ANALYZED

Analyzed failed with following error out of 2700 tables 2200 odd got analyzed
ERROR at line 1:
ORA-12801: error signaled in parallel query server P052
ORA-08103: object no longer exists
ORA-06512: at "SYS.DBMS_STATS", line 10070
ORA-06512: at "SYS.DBMS_STATS", line 10564
ORA-06512: at "SYS.DBMS_STATS", line 10751
ORA-06512: at "SYS.DBMS_STATS", line 10805
ORA-06512: at "SYS.DBMS_STATS", line 10782
ORA-06512: at line 1

This is known issue in earlier version of oracle 9i when estimate was used instead of compute while gathering statistics using GATHER_SCHEMA_STATS/GATHER_DATABASE_STATS command. Although it was claimed to be fixed in 9.2.0.20 i faced problem in 9.2.0.6.0 while estimating whereas compute worked great.



Analyze query:



Select OWNER,TABLE_NAME,
to_char(LAST_ANALYZED,'MM/DD/YYYY HH24:MI:SS') "last_analyzed"
from dba_tab_columns
where OWNER not in ('SYS','SYSTEM')
and LAST_ANALYZED is not null
and COLUMN_ID=1
and (SYSDATE-LAST_ANALYZED) <>



Simple analyze job script :



#!/bin/sh# Script:

analyze_only.sh

#

# Description: Analyze Database.
# Set the variables

ORACLE_SID=

ORACLE_BASE=

ORACLE_HOME=

LD_LIBRARY_PATH=$ORACLE_HOME/lib

PATH=$PATH:$ORACLE_HOME/bin

export ORACLE_SID ORACLE_HOME PATH LD_LIBRARY_PATH


date


# Analyze Databasesqlplus -s "/ as sysdba" <<>

set echo off

set feedback off

set heading off

set pagesi 0

set linesize 125

spool analyze_all_output.lst

execute DBMS_STATS.GATHER_SCHEMA_STATS ownname=>'',cascade=>TRUE);

select '-----------------------------------------------------------' from dual;

select ' TABLE_NAME LAST ANALYZED ' from dual;

select '-----------------------------------------------------------' from dual;

select table_name, to_char(last_analyzed, 'DD-MON-YY HH24:MI:SS') from dba_tables where OWNER='' ORDER by table_name;

select '---------------------End of List--------------------------------------' from dual;

select '-----------------------------------------------------------' from dual;

select ' INDEX_NAME LAST ANALYZED ' from dual;

select '-----------------------------------------------------------' from dual;

select index_name, to_char(last_analyzed, 'DD-MON-YY HH24:MI:SS') from dba_indexes where OWNER='' ORDER by index_name;

select '---------------------End of List--------------------------------------' from dual;

exit

EOF
ANALYZELOG="analyze_all_output.lst"

oraerr='cat $ANALYZELOGgrep ORA-wc -l'

if [ $oraerr -gt 0 ]
then echo "Status as on 'date' : Analyze Failed" >> "analyze_all_output.lst"

sqlplus /nolog <

conn aa/bb@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=xx.xx.xx.xx)(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME= xxx)))

insert into bkpstats (BKPDATE,SERVER,SRVRIP,DBNAME,BKPTYPE,BKPSTATS) values (SYSDATE,'','','','DB ANALYZE','JOB FAILED');

commit;
EOF
exit;

else

echo "Status as on 'date' : Analyze Successfull" >> "analyze_all_output.lst"
sqlplus /nolog <<>aa/bb@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=xx.xx.xx.xx)(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME= xxx)))

insert into bkpstats (BKPDATE,SERVER,SRVRIP,DBNAME,BKPTYPE,BKPSTATS) values (SYSDATE,'','','','DB ANALYZE','JOB SUCCESSFUL');

commit;
EOF
exit;

fi

mailx -s "$ORACLE_SID Analyze is complete." "xx@xx.com,yy@yy.com" < $ date

RMAN CROSSCHECK

CROSSCHECK command verifies if the object available or expired by examining the file in disk or sbt. CROSSCHECK does not delete files that it does not find. It only updates the repository.

Following error registered in log file while it failed to find the controlfile during scheduled backup

Error message:
RMAN-06207: WARNING: 1 objects could not be deleted for DISK channel(s) due
RMAN-06208: to mismatched status. Use CROSSCHECK command to fix status
List of Mismatched objects
==========================
Object Type Filename/Handle
--------------- ---------------------------------------------------
Datafile Copy C:\PROGRAM FILES\OMNIBACK\TMP\CTRL_ODPI.DBF

Examples to crosscheck:

RMAN> CROSSCHECK CONTROFILE;
RMAN> CROSSCHECK BACKUP;
RMAN> CROSSCHECK COPY;
RMAN> CROSSCHECK backup of database;
RMAN> CROSSCHECK backup of controlfile;
RMAN> CROSSCHECK archivelog all;

Query media manager
SBT
RMAN> ALLOCATE CHANNEL FOR MAINTENANCE DEVICE TYPE sbt;
RMAN> CROSSCHECK BACKUP DEVICE TYPE sbt COMPLETED BETWEEN '01-MAY-09' AND '30-JUNE-09';

DISK
RMAN> CROSSCHECK BACKUP DEVICE TYPE DISK COMPLETED BETWEEN '01-MAY-09' AND '30-JUNE-09';

For default channel below command can be used
RMAN> CROSSCHECK BACKUP COMPLETED BETWEEN '01-MAY-09' AND '30-JUNE-09';