August 2011
Intermediate to advanced
576 pages
16h 12m
English
book
Oracle Database 11g Oracle Real Application Clusters Handbook, 2nd Edition, 2nd Edition
by K Gopalakrishnan
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Introduction to the V$ and GV$ Views
The dynamic performance (V$) view contains database statistics and is commonly used for performance analysis and tuning. In the Oracle RAC environment, a global (GV$) view corresponds to each V$ view. V$ views contain statistics for one instance, whereas GV$ views contain information from all the active instances. Each GV$ view contains an INST_ID column of type NUMBER, which can be used to identify the instance associated with the row data.
When a query is issued against a GV$ view, the instance gets statistics from remote instances using the parallel query mechanism. Starting from Oracle 10g, special parallel query slaves are dedicated to this task. They are named pz98, pz99, and so on, to distinguish them ...
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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.
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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.