August 2015
Intermediate to advanced
672 pages
23h 1m
English
book
Expert Oracle Exadata, Second Edition
by Martin Bach, Karl Arao, Andy Colvin, Frits Hoogland, Randy Johnson, Kerry Osborne, Tanel Poder
Content preview from Expert Oracle Exadata, Second Edition
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CHAPTER 10
Exadata Wait Events
The Oracle database is a very well-instrumented piece of code, and it has been so for quite a while. It keeps track of the amount of time spent in discrete operations via the use of wait events, unless the session in question is on the CPU. While the database software is quite complex, wait event analysis allows performance analysts to determine where the database is spending its time. Many difficult performance problems can be resolved by analyzing data from the wait interface and, more recently, the Active Session History (ASH). The introduction of Exadata has resulted in the creation of several new wait events ...
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