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Burleson Oracle consulting, Oracle training and Oracle support. Turbocharge SQL with advanced Oracle indexing. Oracle Tips by Burleson Consulting March 26, 2002 - Updated April 8, 2015. Focusing Specifically On Oracle Indexes, Database Administration and Some Great Music. Home > select.

Section(s) What You Can Use the Section(s) for. Wait Events. Look for excessive waits and wait times; drill down to specific problems. SQL Ordered by Buffer Gets. Free Oracle Magazine Subscriptions and Oracle White Papers: (Formerly known as "Morgan's Library") You may also want to check out the Oracle Functions and Oracle. Tom, In my report.txt, week after week, I am seeing the contention for lib. In lib cache latch statistics, the SQL AREA GETHITRATIO is only 0. Note: Deletes perform normal DML. Avast Internet Security Key Generator on this page. That is, they take locks on rows, they generate redo (lots of it), and they require segments in the UNDO tablespace.

When you execute an INSERT, UPDATE or DELETE Oracle puts RX (row exclusive) table lock.