Oracle RAC Patching Steps In 11gr2

Oracle RAC Patching Steps In 11gr2

Patch is a software code.

-To fix the bugs
-Defects in software
-It delivers new features/tools

Disadvantages:

-Downtime

Classifications of patches:

-Security patche (CPU/SPU)
-PSU

Pre-requisite before patch (PPA):

-check the invalid objets
-patch conflicts
-patch dependencies
-patch status (applied or not)
-check opatch version (6880880)

GRID patching:

While applying patches on GRID home, bydefault the GRID home is locked

cd $GRID_HOME/crs/install

#./rootcrs.pl -unlock

-it will stop the grid services.
-unlock the GRID home.

$Opatch apply -local
after applying the patch

cd $GRID_HOME/crs/install
#rootcrs.pl -patch

-it will start the GRID services
-it will lock the GRID home.

Apply the GRID patch on node2 with above steps

Patching Steps:

GRID_HOME patching:

-export PATH=$ORACLE_HOME/OPatch:$PATH:.
-check the OPatch version
-check the patch conflicts
-check the invalid objects
-Run rootcrs.pl -unlock script which is located in $GRID_HOME/crs/install with root privileges
-finally apply with OPatch
-OPatch apply -local

RDBMS_HOME patching:

-set the paths
-srvctl stop instance -d PROD -i PROD1
-OPatch apply -local
-srvctl start instance -d PROD -i PROD1
-Run the catbundle.sql script

Note:
catbundle.sql script will update the dba_registry_history table
root.sh will be located in $GRID_HOME/crs/install