Is my database/ OS running 32-bit or 64-bit software?

DBAs often need to know if they should install Oracle 32-bit or 64-bit software on a given server. If the operating system support 64-bit applications, the 64-bit Oracle distribution can be loaded. Otherwise, the 32-bit distribution must be installed. The following Unix commands will tell you whether your OS is running 32-bits or 64-bits:

Solaris - isainfo -v (this command doesn't exist on Solaris 2.6 because it is only 32-bits)


AIX - bootinfo -K

If you need to know if Oracle 32-bit or 64-bit software is currently installed on a system, connect using a command line utility like sqlplus and look at the banner. If you are running 64-bit software, it will be mentioned in the banner. If nothing is listed, you are running on a 32-bit base.

Oracle Listener Protection


Database listeners can be stopped remotely from any operating system account (not just oracle). To prevent this, all listeners on production machines MUST be password protected.

Oracle Default Listener


by Nidhi Jain

Prior to Oracle 8i, a listener was statically configured (listener.ora) to service a given set of SIDs. From 8i, PMON dynamically registers a database service with the listener.


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