Sunday, September 16, 2012

Enabling archivelog mode 


SQL> SELECT LOG_MODE FROM SYS.V$DATABASE;

LOG_MODE
------------
NOARCHIVELOG
 
 
show parameter archive 
 
will tell u the archive destination etc ...



so , create spfile from pfile incase of the db running onthe pfile means, then shutdown startup mount and follow the steps 

SQL> startup mount
ORACLE instance started.

Total System Global Area  184549376 bytes
Fixed Size                  1300928 bytes
Variable Size             157820480 bytes
Database Buffers           25165824 bytes
Redo Buffers                 262144 bytes
Database mounted.

SQL> alter database archivelog;
Database altered.

SQL> alter database open;
Database altered.
 
 
ou can see here that we put the database in ARCHIVELOG mode
by using the SQL statement "alter database archivelog", but 
Oracle won't let us do this unless the instance is mounted but
not open.  To make the change we shutdown the instance, and then
startup the instance again but this time with the "mount" option
which will mount the instance but not open it.  Then we can
enable ARCHIVELOG mode and open the database fully with the "alter
database open" statement.
There are several system views that can provide us with information reguarding archives, such as:
V$DATABASE
Identifies whether the database is in ARCHIVELOG or NOARCHIVELOG mode and whether MANUAL (archiving mode) has been specified.
V$ARCHIVED_LOG
Displays historical archived log information from the control file. If you use a recovery catalog, the RC_ARCHIVED_LOG view contains similar information.
V$ARCHIVE_DEST
Describes the current instance, all archive destinations, and the current value, mode, and status of these destinations.
V$ARCHIVE_PROCESSES
Displays information about the state of the various archive processes for an instance.
V$BACKUP_REDOLOG
Contains information about any backups of archived logs. If you use a recovery catalog, the RC_BACKUP_REDOLOG contains similar information.
V$LOG
Displays all redo log groups for the database and indicates which need to be archived.
V$LOG_HISTORY
Contains log history information such as which logs have been archived and the SCN range for each archived log.
Using these tables we can verify that we are infact in ARCHIVELOG mode:
SQL> select log_mode from v$database; LOG_MODE ------------ ARCHIVELOG SQL> select DEST_NAME,STATUS,DESTINATION from V$ARCHIVE_DEST; 
 
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Saturday, September 15, 2012

Last analyzed dates in oracle

Description

Lists the last analyze date for tables, indexes and partitions. This script should be used to determine is any stats are out of date. 

The Last_analyzed column being NULL indcates no stats are present

Parameters

None

SQL Source

REM Copyright (C) Think Forward.com 1998- 2005. All rights reserved. 

set pages 200

col index_owner form a10
col table_owner form a10
col owner form a10

spool checkstat.lst

PROMPT Regular Tables

select owner,table_name,last_analyzed, global_stats
from dba_tables
where owner not in ('SYS','SYSTEM')
order by owner,table_name
/

PROMPT Partitioned Tables

select table_owner, table_name, partition_name, last_analyzed, global_stats
from dba_tab_partitions
where table_owner not in ('SYS','SYSTEM')
order by table_owner,table_name, partition_name
/

PROMPT Regular Indexes

select owner, index_name, last_analyzed, global_stats
from dba_indexes
where owner not in ('SYS','SYSTEM')
order by owner, index_name
/

PROMPT Partitioned Indexes

select index_owner, index_name, partition_name, last_analyzed, global_stats
from dba_ind_partitions
where index_owner not in ('SYS','SYSTEM')
order by index_owner, index_name, partition_name
/

spool off
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Wednesday, September 12, 2012

ORA-12547: TNS:lost contact ( From Rman as well as from Sql plus

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Monday, September 3, 2012

Users having dba role in Oracle database

SQL> desc dba_role_privs
Name         Null?    Type
------------ -------- ------------
GRANTEE               VARCHAR2(30)
GRANTED_ROLE NOT NULL VARCHAR2(30)
ADMIN_OPTION          VARCHAR2(3)
DEFAULT_ROLE          VARCHAR2(3)

select * from dba_role_privs where granted_role='DBA';

 GRANTEE   GRANTED_ROLE ADM DEF
--------- ------------ --- ---
SYS       DBA          YES YES
SYSTEM    DBA          YES YES


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Monday, August 13, 2012

Oracle import process hanged !! how to handle

Hi

Some times, i use to do a dev refreshes without checking the pre- requisites like size , object counts etc .. but i will pay my time for the same when i see the import taking long time than i expected.

so the below query can be used to see what actually the import process is currently doing inside the db , like which table is getting loaded how many rows are getting updated till  now and we can calculate how long the processs could take etc .. it is a use full quey which i frequently use


select substr(sql_text,instr(sql_text,'INTO "'),30) table_name,
rows_processed,
round((sysdate-to_date(first_load_time,'yyyy-mm-dd hh24:mi:ss'))*24*60,1) minutes,
trunc(rows_processed/((sysdate-to_date(first_load_time,'yyyy-mm-dd hh24:mi:ss'))*24*60)) rows_per_min
from sys.v_$sqlarea
where sql_text like 'INSERT %INTO "%'
and command_type = 2
and open_versions > 0;


and basically check if the imp process still exist on the server

ps -ef | grep imp
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oracle user password expired locked

In 11 r2 , were facing this user lock and expire issue frequently to override it


select profile from dba_users where username ='xxxx';

alter profile default limit passsword_life_time unlimited;
alter profile default limit failed_login_attempts unlimited;


select resource_name,limit from dba_profiles where profile='';
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Wednesday, March 28, 2012

Oracle Database scripts basic




Database Scripts Library Index [ID 131704.1]
Modified 03-NOV-2011     Type REFERENCE     Status ARCHIVED

Database Scripts Last updated on October 23, 2009
This document has been archived and will no longer be updated.
AdvancedQueueing ContentMgmt.Spatial ContentMgmt.Text ContentMgmt.UltraSearch
ContentMgmt.XDB ContentMgmt.interMedia DBA.Admin DBA.Architecture
DBA.DBCreationAndConfiguration DBA.Monitoring DBA.SQL DBA.Storage
DBWarehouse.MaterialView DBWarehouse.ParallelExecution DBWarehouse.Partitioning Distributed.General
Distributed.Replication Distributed.Streams Globalization Globalization.DST
HighAvailability.BR HighAvailability.Corruption HighAvailability.DataGuard HighAvailability.RMAN
Install.Installer Install.UnixGeneric JVM Manageability.MemoryMgmt
Manageability.Utilities.ExportImport Manageability.Utilities.SqlLoader OLAP.ExpressServer Performance.Database
Performance.Locking Performance.SqlTuning Scalability.OPS Scalability.RAC
Security.DBSecurity Storage.Exadata
AdvancedQueueing - Advanced Queuing
[Top]
ContentMgmt.Spatial - Oracle Intermedia Spatial and Spatial Data Option
[Top]
ContentMgmt.Text - Oracle Text (formerly interMedia Text)
[Top]
ContentMgmt.UltraSearch - Oracle Ultra Search
[Top]
ContentMgmt.XDB - XML Database
[Top]
ContentMgmt.interMedia - Oracle interMedia (Image, Video, Sound etc)
[Top]
DBA.Admin - General DBA Activities (Copying DB etc...)
[Top]
DBA.Architecture - Oracle Server Architecture (processes and SGA)
[Top]
DBA.DBCreationAndConfiguration - Database Create and Configuration
[Top]
DBA.Monitoring - Database Monitoring
[Top]
DBA.SQL - SQL Scripts, Examples and Reference Information
[Top]
DBA.Storage - Space Management and Object Storage
[Top]
DBWarehouse.MaterialView - Materialized Views - Distributed & Local Summary
[Top]
DBWarehouse.ParallelExecution - Parallel Execution
[Top]
DBWarehouse.Partitioning - Partitioning
[Top]
Distributed.General - Distributed Database Issues
[Top]
Distributed.Replication - Master Replication
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