Oracle Wait Interface: A Practical Guide to Performance Diagnostics & Tuning
by Richmond Shee, Kirtikumar Deshpande, K Gopalakrishnan
In a Nutshell
All Oracle sessions will encounter waits for required resources. You cannot eliminate such waits entirely. OWI enables measurement of all such waits and provides a mechanism to report them. This information is critical to troubleshooting the root cause of such waits and to minimizing them. The less time a session spends waiting for a resource, the faster it may run, improving the response time to the end users, and that is the goal you are after.
The wait event views V$SYSTEM_EVENT, V$SESSION_EVENT, and V$SESSION_WAIT provide various levels of information that you can use to quickly identify sessions contributing to the wait times. The extended SQL trace (trace event 10046) facility nicely supplements these views to report all wait ...
Become 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,
and much more.
Read now
Unlock full access