July 2004
Intermediate to advanced
384 pages
9h 32m
English
book
Oracle Wait Interface: A Practical Guide to Performance Diagnostics & Tuning
by Richmond Shee, Kirtikumar Deshpande, K Gopalakrishnan
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In a Nutshell
Congratulations! You have just read the longest chapter in this book. We discussed three wait events: latch free, enqueue, and buffer busy waits. They are the in-memory latency.
A latch is a simple locking device used to protect critical SGA memory structures. Every process that reads or modifies data in the SGA must perform the operation under the protection of latches.
An enqueue is a sophisticated locking device used to protect database resources. A resource may be shared if the lock mode is compatible. If not, the requesting process puts its lock request in a queue and it is serviced in order.
A buffer busy waits wait is a wait for a buffer lock or pin. A buffer must be pinned before it can be read or modified so that the integrity ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.