Friday, November 27, 2015

Fix ORA-16072

Today after restore and recovery prod database on test environment I faced with strange error:

ORA-16072: a minimum of one standby database destination is required.

My database environment :

 OS: OEL 6.5  
 DB: 11.2.0.4  

After recovery database stays on MOUNT mode and could not open it.

RMAN-00571: ===========================================================  
 RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============  
 RMAN-00571: ===========================================================  
 RMAN-03002: failure of recover command at 11/27/2015 12:55:01  
 RMAN-06054: media recovery requesting unknown archived log for thread 1 with sequence 9573 and starting SCN of 556583605 

RMAN> alter database open resetlogs;  
 RMAN-00571: ===========================================================  
 RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============  
 RMAN-00571: ===========================================================  
 RMAN-03002: failure of alter db command at 11/27/2015 12:56:08  
 ORA-03113: end-of-file on communication channel  
 Process ID: 12064  
 Session ID: 958 Serial number: 11  
 RMAN-00571: ===========================================================  
 RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============  
 RMAN-00571: ===========================================================  
 ORA-03114: not connected to ORACLE  
 RMAN-00571: ===========================================================  
 RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============  
 RMAN-00571: ===========================================================  
 RMAN-03002: failure of alter db command at 11/27/2015 12:56:08  
 ORA-03113: end-of-file on communication channel  
 Process ID: 12064  
 Session ID: 958 Serial number: 11  
 [oracle@TESTDB dbs]$  


Checking alertlog:
LGWR: STARTING ARCH PROCESSES  
 Fri Nov 27 14:44:35 2015  
 ARC0 started with pid=22, OS id=23775   
 ARC0: Archival started  
 LGWR: STARTING ARCH PROCESSES COMPLETE  
 ARC0: STARTING ARCH PROCESSES  
 LGWR: Primary database is in MAXIMUM AVAILABILITY mode  
 LGWR: Destination LOG_ARCHIVE_DEST_1 is not serviced by LGWR  
 LGWR: Minimum of 1 LGWR standby database required  
 Errors in file /u01/oracle/diag/rdbms/prod/XXXX/trace/XXXX_lgwr_23742.trc:  
 ORA-16072: a minimum of one standby database destination is required 


I turned off archivelog mode on my test database and tried to open. It opened successfully. But I need my test database have to be on archivelog mode.

To handle it I checked and corrected some parameters:

SQL> select open_mode, log_mode from v$database;  
 OPEN_MODE   LOG_MODE  
 -------------------- ------------  
 READ WRITE   NOARCHIVELOG  



SQL> set linesize 100  
 SQL> show parameter fal_  
 NAME     TYPE     VALUE  
 ------------------------------------ -------------------------------- ------------------------------  
 fal_client    string     XXXX  
 fal_server    string     XXXX_SB  
 SQL> alter system set fal_client='' scope=spfile;  
 System altered.  
 SQL> alter system set fal_server='' scope=spfile;  
 System altered.  
 SQL> alter system set log_archive_dest_1='LOCATION=USE_DB_RECOVERY_FILE_DEST';  
 System altered  
 SQL> select open_mode, DATABASE_ROLE, guard_status, SWITCHOVER_STATUS from v$database;  
 OPEN_MODE   DATABASE_ROLE  GUARD_S SWITCHOVER_STATUS  
 -------------------- ---------------- ------- --------------------  
 MOUNTED    PRIMARY    NONE  NOT ALLOWED  
 Database altered.  


Restart database

 SQL> shut immediate  
 ORA-01109: database not open  
 Database dismounted.  
 ORACLE instance shut down.  
 SQL> startup mount  
 ORA-32004: obsolete or deprecated parameter(s) specified for RDBMS instance  
 ORACLE instance started.  
 Total System Global Area 8584982528 bytes  
 Fixed Size   2260128 bytes  
 Variable Size  6341788512 bytes  
 Database Buffers 2214592512 bytes  
 Redo Buffers   26341376 bytes  
 Database mounted.  
 SQL> alter database open;  
 Database altered.  

Perfect

SQL> select name, open_mode from v$database;  
 NAME OPEN_MODE  
 ---------  ------------------------  
 XXXX  READ WRITE  
 SQL>  



But in alertlog still error

 Errors in file /u01/oracle/diag/rdbms/prod/XXXX/trace/XXXX_arct_24125.trc:  
 ORA-00313: open failed for members of log group 7 of thread 0  
 ORA-00312: online log 7 thread 0: '/u01/oracle/fast_recovery_area/XXXX/onlinelog/o1_mf_7_c4vcl2pw_.log' 


There standby redo logs. Let`s drop it

 SQL> select group#, bytes from v$standby_log;  
   GROUP# BYTES  
 ---------- ----------  
  4 314572800  
  5 314572800  
  6 314572800  
  7 314572800  
 SQL> set linesize 150  
 SQL> col member for a80  
 SQL> select group#, member from v$logfile;  
   GROUP# MEMBER  
 ---------- --------------------------------------------------------------------------------  
  1 /u01/oracle/oradata/XXX/redo01.log  
  2 /u01/oracle/oradata/XXX/redo02.log  
  3 /u01/oracle/oradata/XXX/redo03.log  
  4 /u01/oracle/fast_recovery_area/XXX/onlinelog/o1_mf_4_c5jf59f8_.log  
  5 /u01/oracle/fast_recovery_area/XXX/onlinelog/o1_mf_5_c5jf5df9_.log  
  6 /u01/oracle/fast_recovery_area/XXX/onlinelog/o1_mf_6_c5jf5hfv_.log  
  7 /u01/oracle/fast_recovery_area/XXX/onlinelog/o1_mf_7_c5jf5lw1_.log  
 7 rows selected.  


[oracle@TESTDB onlinelog]$ pwd
/u01/oracle/fast_recovery_area/XXXX/onlinelog

[oracle@TESTDB onlinelog]$ ls -lrt  
 total 1228820  
 -rw-r-----. 1 oracle oinstall 314573312 Nov 27 14:47 o1_mf_4_c5jf59f8_.log  
 -rw-r-----. 1 oracle oinstall 314573312 Nov 27 14:47 o1_mf_5_c5jf5df9_.log  
 -rw-r-----. 1 oracle oinstall 314573312 Nov 27 14:47 o1_mf_6_c5jf5hfv_.log  
 -rw-r-----. 1 oracle oinstall 314573312 Nov 27 14:47 o1_mf_7_c5jf5lw1_.log



 SQL> select status, group#, bytes from v$standby_log;  
 STATUS    GROUP#  BYTES  
 ---------- ---------- ----------  
 UNASSIGNED   4 314572800  
 UNASSIGNED   5 314572800  
 UNASSIGNED   6 314572800  
 UNASSIGNED   7 314572800  
 SQL> alter database drop standby logfile group 4;  
 Database altered.  
 SQL> alter database drop standby logfile group 5;  
 Database altered.  
 SQL> alter database drop standby logfile group 6;  
 Database altered.  
 SQL> alter database drop standby logfile group 7;  
 Database altered.  

After restart db check alertlog

SQL> shut immediate  
 Database closed.  
 Database dismounted.  
 ORACLE instance shut down.  
 SQL> startup  
 ORA-32004: obsolete or deprecated parameter(s) specified for RDBMS instance  
 ORACLE instance started.  
 Total System Global Area 8584982528 bytes  
 Fixed Size   2260128 bytes  
 Variable Size  6341788512 bytes  
 Database Buffers 2214592512 bytes  
 Redo Buffers   26341376 bytes  
 Database mounted.  
 Database opened.  
 SQL>   

Alertlog is clear
Fri Nov 27 15:15:42 2015  
 ALTER DATABASE OPEN  
 LGWR: STARTING ARCH PROCESSES  
 Fri Nov 27 15:15:42 2015  

Sunday, November 22, 2015

Fix ORA-16053

Today I will show you how to handle ORA-16053 error

--Check maximum sequence number of archive log
SQL> select max(sequence#) from v$archived_log;  
 MAX(SEQUENCE#)  
 --------------  
       36  


--Now check parameter
SQL> col destination for a70  
 SQL> select dest_id, status, destination, error from v$archive_dest;  
   DEST_ID STATUS  DESTINATION                              ERROR  
 ---------- --------- ---------------------------------------------------------------------- -----------------------------------------------------------------  
      1 BAD PARAM                                    ORA-16053: DB_UNIQUE_NAME is not in the Data Guard Configuration  
      2 VALID   PROD  
      3 INACTIVE  
      4 INACTIVE  
      5 INACTIVE  
      6 INACTIVE  
      7 INACTIVE  
      8 INACTIVE  
      9 INACTIVE  
     10 INACTIVE  
     11 VALID   /u01/app/oracle/product/11.0.1/db_1/dbs/arch  
 11 rows selected.  

Here is error which means db_unique_name not setted on parameter.


--Also below query provide us bad param if not properly configured.
SQL> select status, dest_id, error from v$archive_dest_status;  
 STATUS    DEST_ID ERROR  
 --------- ---------- -----------------------------------------------------------------  
 BAD PARAM     1 ORA-16053: DB_UNIQUE_NAME is not in the Data Guard Configuration  
 VALID       2  
 INACTIVE      3  
 INACTIVE      4  
 INACTIVE      5  
 INACTIVE      6  
 INACTIVE      7  
 INACTIVE      8  
 INACTIVE      9  
 INACTIVE     10  
 VALID       11  
 11 rows selected.  

SQL> show parameter log_archive_config  
 NAME                 TYPE    VALUE  
 ------------------------------------ ----------- ------------------------------  
 log_archive_config          string   DG_CONFIG=(PROD,STAND)  
 --set log_archive_config  
 SQL> alter system set log_archive_config='DG_CONFIG=(STAND,PROD)';  
 System altered. 


SQL> show parameter log_archive_dest_1  
 NAME                 TYPE    VALUE  
 ------------------------------------ ----------- ------------------------------  
 log_archive_dest_1          string   LOCATION=USE_DB_RECOVERY_FILE_  
                          DEST VALID_FOR=(ALL_LOGFILES,A  
                          LL_ROLES) DB_UNIQUE_NAME=PROD  
 log_archive_dest_10         string  
 SQL> show parameter log_archive_dest_2  
 NAME                 TYPE    VALUE  
 ------------------------------------ ----------- ------------------------------  
 log_archive_dest_2          string   SERVICE=PROD VALID_FOR=(ONLINE  
                          _LOGFILE,PRIMARY_ROLE) async d  
                          b_unique_name=PROD  
 SQL> alter system set log_archive_dest_1='LOCATION=USE_DB_RECOVERY_FILE_DEST VALID_FOR=(ALL_LOGFILES,ALL_ROLES_ DB_UNIQUE_NAME=STAND' scope=both;  
 System altered.  



SQL> select status, dest_id, error from v$archive_dest_status where dest_id=2;  
 STATUS         DEST_ID ERROR  
 -------------------- ---------- -----------------------------------------------------------------  
 VALID    

 SQL> select dest_id, status, destination, error from v$archive_dest;  
   DEST_ID STATUS        DESTINATION                              ERROR  
 ---------- -------------------- ---------------------------------------------------------------------- -----------------------------------------------------------------  
      1 VALID        USE_DB_RECOVERY_FILE_DEST  
      2 VALID        PROD  
      3 INACTIVE  
      4 INACTIVE  
      5 INACTIVE  
      6 INACTIVE  
      7 INACTIVE  
      8 INACTIVE  
      9 INACTIVE  
     10 INACTIVE  
     11 VALID        USE_DB_RECOVERY_FILE_DEST  
 11 rows selected.  


--Now check again and you will see logs start to receive and applying.

 SQL> select max(sequence#) from v$archived_log;  
 MAX(SEQUENCE#)  
 --------------  
       45  

Monday, November 16, 2015

Fix INS-32025

Sometimes we face "[INS-32025] The chosen installation conflicts with software already installed in the given Oracle home" error when we reinstall Oracle home.



To fix this error, go to oraInventory folder.


cd /u01/oraInventory/ContentsXML --this is my folder
edit inventory.xml any editor
remove below line:

<HOME NAME="OraDb11g_home1" LOC="/u01/oracle/product/11.2.0/dbhome_1" TYPE="O" IDX="1"/>

execute runInstaller again

Thursday, November 5, 2015

List of most used tables

I requested to gather most used tables list in production database.
After investigation I found some advice and of course metalink note.

Here is OTN link:  https://forums.oracle.com/forums/thread.jspa?threadID=511661


Use below query.

SQL> SELECT ROWNUM AS RANK, Seg_Lio.*  
  FROM ( SELECT St.Owner,  
          St.Obj#,  
          St.Object_Type,  
          St.Object_Name,  
          St.VALUE,  
          'LIO' AS Unit  
       FROM V$segment_Statistics St  
       WHERE St.Statistic_Name = 'logical reads'  
     ORDER BY St.VALUE DESC) Seg_Lio  
 WHERE owner not in ('SYS', 'SYSTEM') and object_type='TABLE' and ROWNUM <= 20  
 UNION ALL  
 SELECT ROWNUM AS RANK, Seq_Pio_r.*  
  FROM ( SELECT St.Owner,  
          St.Obj#,  
          St.Object_Type,  
          St.Object_Name,  
          St.VALUE,  
          'PIO Reads' AS Unit  
       FROM V$segment_Statistics St  
       WHERE St.Statistic_Name = 'physical reads'  
     ORDER BY St.VALUE DESC) Seq_Pio_r  
 WHERE owner not in ('SYS', 'SYSTEM') and object_type='TABLE' and ROWNUM <= 20  
 UNION ALL  
 SELECT ROWNUM AS RANK, Seq_Pio_w.*  
  FROM ( SELECT St.Owner,  
          St.Obj#,  
          St.Object_Type,  
          St.Object_Name,  
          St.VALUE,  
          'PIO Writes' AS Unit  
       FROM V$segment_Statistics St  
       WHERE St.Statistic_Name = 'physical writes'  
     ORDER BY St.VALUE DESC) Seq_Pio_w  
 WHERE owner not in ('SYS', 'SYSTEM') and object_type='TABLE' and ROWNUM <= 20  
 UNION ALL  
 SELECT ROWNUM AS RANK, Seq_Pio_w.*  
  FROM ( SELECT St.Owner,  
          St.Obj#,  
          St.Object_Type,  
          St.Object_Name,  
          St.VALUE,  
          'PIO READS Direct' AS Unit  
       FROM V$segment_Statistics St  
       WHERE St.Statistic_Name = 'physical reads direct'  
     ORDER BY St.VALUE DESC) Seq_Pio_w  
 WHERE owner not in ('SYS', 'SYSTEM') and object_type='TABLE' and ROWNUM <= 20  
 UNION ALL  
 SELECT ROWNUM AS RANK, Seq_Pio_w.*  
  FROM ( SELECT St.Owner,  
          St.Obj#,  
          St.Object_Type,  
          St.Object_Name,  
          St.VALUE,  
          'DB Block changes' AS Unit  
       FROM V$segment_Statistics St  
       WHERE St.Statistic_Name = 'db block changes'  
     ORDER BY St.VALUE DESC) Seq_Pio_w  
 WHERE owner not in ('SYS', 'SYSTEM') and object_type='TABLE' and ROWNUM <= 20  
For detail please refer to metalink note: 252597.1

Also you may select below views to get some necessary information.

--tables which modificated
 SQL> select * from dba_tab_modifications where table_owner='????' 

Starting Oracle 11g if your statistics_level`s value TYPICAL Oracle automatically will gather and monitor your tables.

--List of monitored tables
SQL> select * from dba_tables where owner='?????' and monitoring='YES' 


 SQL> select owner, monitoring, count(1)   
 from dba_tables   
 group by owner, monitoring   
 order by 1, count(1)