architecture

Oracle Database 11g New Feature for DBAs?

1) Automatic Diagnostic Repository [ADR]

2) Database Replay

3) Automatic Memory Tuning

4) Case sensitive password

5) Virtual columns and indexes

6) Interval Partition and System Partition

7) The Result Cache

8) ADDM RAC Enhancements

9) SQL Plan Management and SQL Plan Baselines

10) SQL Access Advisor & Partition Advisor

11) SQL Query Repair Advisor

12) SQL Performance Analyzer (SPA) New

13) DBMS_STATS Enhancements

14) The Result Cache

15) Total Recall (Flashback Data Archive)

What is the Difference Between Local Inventory and Global Inventory?

What is oraInventory ?

oraInventory is repository (directory) which store/records oracle software products & their oracle_homes location on a machine. This Inventory now a days in XML format and called as XML Inventory where as in past it used to be in binary format & called as binary Inventory.

There are basically two kind of inventories,

One is Local Inventory (also called as Oracle Home Inventory) and other is  Global Inventory (also called as Central Inventory).

What is Global Inventory ?

Global Inventory holds information about Oracle Products on a Machine. These products can be various oracle components like database, oracle application server, collaboration suite, soa suite, forms & reports or discoverer server . This global Inventory location will be determined by file oraInst.loc in /etc (on Linux) or /var/opt/oracle (solaris). If you want to see list of oracle products on machine check for file inventory.xml under ContentsXML in oraInventory Please note if you have multiple global Inventory on machine check all oraInventory directories)

You will see entry like

HOME NAME=”ORA10g_HOME” LOC=”/u01/oracle/10.2.0/db” TYPE=”O” IDX=”1?/

What is Local Inventory ?

Inventory inside each Oracle Home is called as local Inventory or oracle_home Inventory. This Inventory holds information to that oracle_home only.

What is Oracle Home Inventory?

Oracle home inventory or local inventory is present inside each Oracle home. It only contains information relevant to a particular Oracle home. This file is located in the following location:

$ORACLE_HOME/inventory

It contains the following files and folders:

·         Components File

·         Home Properties File

·         Other Folders

Can I have multiple Global Inventory on a machine ?

Quite common questions is that can you have multiple global Inventory and answer is YES you can have multiple global Inventory but if your upgrading or applying patch then change Inventory Pointer oraInst.loc to respective location. If you are following single global Inventory and if you wish to uninstall any software then remove it from Global Inventory as well.

What to do if my Global Inventory is corrupted ?

No need to worry if your global Inventory is corrupted, you can recreate global Inventory on machine using Universal Installer and attach already Installed oracle home by option

-attachHome

./runInstaller -silent -attachHome -invPtrLoc $location_to_oraInst.loc

ORACLE_HOME=”Oracle_Home_Location” ORACLE_HOME_NAME=”Oracle_Home_Name”

CLUSTER_NODES=”{}”