Nidhi Jain's blog

Understanding Shared Memory and Semaphores

by 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

articles: 

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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