Skip to main content

Issue running adcfgclone.pl on Database Oracle home.

  While running adcfgclone.pl as oracle user, the session just hangs without giving any error in the log file. The issue was that it wasn’t able to connect to the database as:


sqlplus "/as sysdbaa



This can be  occur due to improper shutdown of the database. While in the course of a database shutdown, if any of the oracle process is not completed killed and it holds a large shared memory segment, such issues can occur which would prevent from normal database operation.

So next time when an instance tries to start it is not able to grab a large chunk of memory to get started.

This can be checked as follows:

After the database has been shut down , there shouldn’t be any processes running as oracle on the server level:

ipcs -m | grep <oracle user>

eg:

ipcs -m | grep oracle

key              shmid          owner   perms         bytes        nattch     status
0x732xx675 65788     oracle     690       56788997      0


Here in the above example, a single oracle process holds 56788997 bytes of shared memory, even after shutdown. If the database instance is started, then we would expect abnormal behaviors on the database side, like the login issue that we are discussing now.
This can cleaned as mentioned below:

ipcrm -m < shmid>

eg:

ipcrm -m 65788   

This would free up the memory held.

This resolved the issue.

Comments

Popular posts from this blog

19c ORACLE HOME Cloning -Linux/Solaris

  Cloning an Oracle home involves creating a copy of the Oracle home and then configuring it for a new environment. If you are performing multiple Oracle Database installations, then you may want to use cloning to create each Oracle home, because copying files from an existing Oracle Database installation takes less time than creating a new version of them. This method is also useful if the Oracle home that you are cloning has had patches applied to it. When you clone the Oracle home, the new Oracle home has the patch updates which is already applied on oracle home. Steps to clone an Oracle home step 1 : Stop Services Stop all processes related to the Oracle home. Step 2 : Create a ZIP or TAR file with the Oracle home (/u01/app/oracle/product/19.0.0/dbhome_1)    Use ROOT user for ZIP and UNZIP  # zip -r dbhome_1.zip /u01/app/oracle/product/19.0.0/dbhome_1 TAR option: # tar -cvf dbhome_1.tar /u01/app/oracle/product/19.0.0/dbhome_1 Step 3: s cp zip/tar to target s...

EBS Standby Role Tranistion using standby database and standby application Tier

 Role Transitions A database can operate in either a primary or standby role - these roles are mutually exclusive. Oracle Data Guard enables you to change these roles dynamically by issuing SQL commands, and supports the following transitions: Switchover Allows the primary database to switch roles with one of its standby databases. There is no data loss during a switchover. After a switchover, each database continues to participate in the Oracle Data Guard configuration with its new role. Failover Changes a standby database to the primary role in response to a primary database failure. The following role transitions are discussed: 6.1 Performing a Switchover 6.2 Performing a Failover 6.3 Performing a Switchback to the Primary Following A Switchover/Failover Each of these three transitions requires some application configuration to be performed. Most of the application configuration step...

EBS R12.2.4 AutoConfig could not successfully execute the following scripts followed by error "txkGenADOPWrapper.pl INSTE8_APPLY 1"

issue:txkGenADOPWrapper.pl    INSTE8_APPLY       1 WARNING: [AutoConfig Error Report] The following report lists errors AutoConfig encountered during each phase of its execution.  Errors are grouped by directory and phase. The report format is:       <filename>  <phase>  <return code where appropriate>   [APPLY PHASE]   AutoConfig could not successfully execute the following scripts:     Directory: /u01/applprod/fs2/FMW_Home/webtier/perl/bin/perl -I /u01/applprod/fs2/FMW_Home/webtier/perl/lib/5.10.0 -I /u01/applprod/fs2/FMW_Home/webtier/perl/lib/site_perl/5.10.0 -I /u01/applprod/fs2/EBSapps/appl/au/12.0.0/perl -I /u01/applprod/fs2/FMW_Home/webtier/ohs/mod_perl/lib/site_perl/5.10.0/x86_64-linux-thread-multi /u01/applprod/fs2/inst/apps/PRODDB_epc-apps12-node41v/admin/install       txkGenADOPWrapper.pl    ...