Nidhi Jain's blog
Understanding Shared Memory and Semaphores
Submitted by Nidhi Jain on Mon, 2003-12-15 13:03by Nidhi Jain
Shared memory and semaphores are two important resources for an Oracle instance on Unix. An instance cannot start if it is unable to allocate what it needs.
Oracle Default Listener
Submitted by Nidhi Jain on Sat, 2003-02-01 08:52by 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.