How to debug Backup, Restore Session in RMAN

In many cases in RMAN we need to debug the session to find and investigate the session about what is happening there. Also to obtain and check the correct diagnostic evidence we sometimes need the debug the rman session.

The most common use of debugging RMAN session is whenever we fail RMAN operation. In fact if any failure in RMAN operation RMAN log and debug files are NOT generated by default and we explicitly need to enable it.

We can log and debug session whichever operation we do in RMAN. Like Backup, Restore, TSPITR, DBPITR, Duplicate Database, Restore to a new host etc.

The commnad is simple,
The syntax is,
$ rman target [un/pwd@target_db] catalog [un/pwd@catalog_db] debug trace rman.trc log rman.log
RMAN>[RMAN Commands Here]

Where un indicates username and pwd indicates password.

In my system I used debugging and logging RMAN session by,
$ rman target / log=/backup03/webkey/rmanlog.txt trace=/backup03/webkey/rmantrace.log
RMAN> debug on
RMAN> @/backup03/webkey/rman_script
RMAN> debug off;
RMAN> exit;


Where my restore commands was inside the /backup03/webkey/rman_script file. And don't confuse with the sequence 2,3,4 here printed. It is line number inside my script of backup.

Later we can see the log information from file rmanlog.txt by,
$ less /backup03/webkey/rmanlog.txt (On Unix System)

We can see debug information from rmantrace.log by,
$ less /backup03/webkey/rmantrace.log (On my Unix System)
.
.
.
.

DBGMISC: command to be compiled and executed is: DEBUG [03:13:27.795] (krmice)
DBGMISC: command after this command is: NONE [03:13:27.795] (krmice)
DBGMISC: current incarnation does not matter for DEBUG [03:13:27.795] (krmice)
Debugging turned off

Above is the sample output of the file of /backup03/webkey/rmantrace.log

Comments

Post a Comment

Popular posts from this blog

ORA-00923: FROM keyword not found where expected

Problem Symptom While performing a simple select statement it fails with error ORA-00923: FROM keyword not found where expected like below. SQL> select 48*1024*1024*1024 decimal from dual; select 48*1024*1024*1024 decimal from dual * ERROR at line 1: ORA-00923: FROM keyword not found where expected Cause of the problem The ORA-00923 can be caused by two different reasons. 1)Oracle itself expect FROM keyword in the position but it could not find any. Like below, SQL> select 48*1024 om dual; select 48*1024 om dual * ERROR at line 1: ORA-00923: FROM keyword not found where expected As no from keyword found so error arises. Oracle expected from in place of keyword dual. 2)The secong cause can sometimes mislead you. Like in case of SQL> select 48*1024*1024*1024 decimal from dual; select 48*1024*1024*1024 decimal from dual * ERROR at line 1: ORA-00923: FROM keyword not found where exp
Read more

How to make partitioning in Oracle more Quickly

As the table size grows and full table scans happens more frequently then there is no alternative than partitioning in oracle. Partition greatly enhance performance of a query. I will start my partitioning system simply with an example. In my database the following query took 30~35 seconds to complete. After partitioning the performance increased amazingly and it then took only 1 second. My query was, SELECT DISTINCT fs.type, fs.id , fs.pid, fs.cid , fs.cr_id, fs.created_date FROM summary fs where fs.id in (select fa.id from forms fa where fa.sar in (select la.sar from login la where la.login_id=1 and fa.created_date BETWEEN to_date('1-MAY-2008') AND to_date('21-SEP-2008') and fs.created_date BETWEEN to_date('1-MAY-2008') AND to_date('21-SEP-2008') ) )and mode=0; After seeing above query I decide to make range partition on column created_date both in summary table and forms table. Below is the list of procedur
Read more

Copy files between Unix and Windows with rcp

There are many third party tools by which you can copy files between windows and unix machine. Some common tools are winscp, SSHSecureShellClient etc. Instead of using any third party tool, you can use original unix and windows built-in tool to do the task. The RCP (Remote CoPy) is a standard UNIX tool and a Microsoft Windows 2000 tool that copies files/folder to and from computer running the RCP service. Before you can use the RCP tool from a Windows-based computer you must do something in your UNIX computer. you must turn on the RCP service and update the security files to allow the Windows-based computer to connect to your unix machine over this service. The following steps will help you. Step 01: Turn on RCP service on UNIX Host Turn on the RCP service on unix machine by using inetd: 1. Log on as root. 2. Edit the file /etc/Inetd.conf. 3. Uncomment the lines that start with shell and that start with exec. 4. Save the file. 5. Use ps -ef |grep inetd and determine inetd service p
Read more