November 2008
Intermediate to advanced
528 pages
12h 13m
English
Content preview from Linux Recipes for Oracle DBAsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 9. Viewing and Configuring System Resources
As part of normal operations, Oracle database processes constantly coordinate and communicate with system server processes. In Linux, this type of process-to-process coordination is referred to as interprocess communication (IPC). Linux supports three types of interprocess communication mechanisms: semaphores, shared memory, and message queues. Oracle database applications typically require significant amounts of semaphore and shared memory resources to function properly. This chapter focuses on how to view and manage these critical system resources.
A semaphore is a construct used by the operating system to control what processes can have access to other server resources such as shared memory. ...
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