Welcome to Paul Chuks Oracle dba Professional

The following steps will help you revive an un-responsive KVM on your linux work station.... fixing an unresponsive VM..... 1. Launch a terminal from the linux session... and logon using sudo 2. make sure the VM file is running.. by running #virsh list --all 3. If the VM is not listed under the running VMs, then go to /etc/libvirt/qemu and check if xml file for the affected VM is there 4. check /var/lib/libvirt/qemu/save/ for a copy of the affected vm (vm_name.save) and delete it 5. run virsh start (vm_name) This five short steps can help you save your VM...

Use this query to get the password of the user in the database: select user#, name,password from SYS.user$ where name = '<USERNAME>'; Then use this below to reset the password alter user <username> identified by values '<PASSWORD>';

when getting error while starting RAC db,  and all the raw device for storage has the right permission and +ASM is up but db refuse to start with below error: oradb@HOSTNAME01:/dev $ ls -lrt asm-disk* lrwxrwxrwx 1 root root 3 Mar  6 20:43 asm-disk3 -> sde lrwxrwxrwx 1 root root 3 Mar  6 20:43 asm-disk2 -> sdc lrwxrwxrwx 1 root root 3 Mar  6 20:43 asm-disk5 -> sdg lrwxrwxrwx 1 root root 3 Mar  6 20:43 asm-disk4 -> sdf lrwxrwxrwx 1 root root 3 Mar  6 20:48 asm-disk1 -> sdd oradb@HOSTNAME01:/dev $    INST_ID GROUP_NUMBER NAME                      State ---------- ------------ ------------------------- -----------          1            1 DG_01                     MOUNTED          1            2 FRA                       MOUNTED          1            3 OCR_VOTE                  MOUNTED    INST_ID NAME                      PATH                           State       HEADER_STATU ---------- ------------------------- ------------------------------ ----------- ------------        

SUMMARY ======== "DG01" diskgroup cannot be mounted due to one disk member is missing: ====================================================== SQL> ALTER DISKGROUP DG01 MOUNT /* asm agent *//* {1:16801:2} */ NOTE: cache registered group DG01 number=1 incarn=0x2929b317 NOTE: cache began mount (first) of group DG01 number=1 incarn=0x2929b317 NOTE: Assigning number (1,1) to disk (/dev/asm-disk5) Sat Feb 14 06:41:49 2015 ERROR: no read quorum in group: required 1, found 0 disks NOTE: cache dismounting (clean) group 1/0x2929B317 (DG01) NOTE: messaging CKPT to quiesce pins Unix process pid: 7194, image: oracle@SLSLMEDIDBOP01 (TNS V1-V3) NOTE: dbwr not being msg'd to dismount NOTE: lgwr not being msg'd to dismount NOTE: cache dismounted group 1/0x2929B317 (DG01) NOTE: cache ending mount (fail) of group DG01 number=1 incarn=0x2929b317 NOTE: cache deleting context for group DG01 1/0x2929b317 GMON dismounting group 1 at 18 for pid 29, osid 7194 NOTE: Dis

SOLUTION for rman error: RMAN-06429: RCVCAT database is not compatible with this version of RMAN $ rman target / catalog rman/********@CATDB Recovery Manager: Release 11.2.0.3.0 - Production on Sat Feb 14 18:05:00 2015 Copyright (c) 1982, 2011, Oracle and/or its affiliates.  All rights reserved. connected to target database:XXX (DBID=607******5) connected to recovery catalog database recovery catalog is partially upgraded to 11.02.00.03 RMAN> crosscheck archivelog all; ORACLE error from recovery catalog database: ORA-06550: line 1, column 41: PLS-00201: identifier 'DBMS_RCVMAN.GETPACKAGEVERSION' must be declared ORA-06550: line 1, column 34: PL/SQL: Statement ignored recovery catalog is partially upgraded to 11.02.00.03 RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of crosscheck comman

When preparing to taking export backup of application tables from a target database(source) and importing to another database(destination), You need to do the following: 1. You need to create directory where the dump file to be created with reside. CREATE DIRECTORY DUMPDIR AS '<filesystem_path with enough space>'; example: CREATE DIRECTORY DUMPDIR AS '/u01/export/dumpdir'; 2. Grant required permission to the directory. GRANT READ, WRITE ON DIRECTORY DUMPDIR TO <USERNAME>; 3. Select the properties of the objects/tables to be exported in the source database. select owner,segment_name,segment_type,tablespace_name, sum(bytes/1024/1024) from dba_segments where segment_name IN ('table_name','object_name','table_name','table_name'...) group by owner,segment_name,segment_type,tablespace_name ; example: --------------------------------------------------------------------------------------------------------------------------------- OWNE

This script is handy when you are having space challenge in your storage either +asm or filesyste. First connect to the target database and then to the catalog database. crosscheck archivelog all; resync catalog; run { allocate channel c1 TYPE 'sbt_tape'; allocate channel c2 TYPE 'sbt_tape'; allocate channel c3 TYPE 'sbt_tape'; backup archivelog all delete input; release channel c1; release channel c2; release channel c3; }