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by Craig Shallahamer Get the book here |
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Craig Shallahamer's Blog
The text below is an except from the book, Oracle Performance Firefighting, written by Craig Shallahamer of OraPub, Inc. Figures and tables are not included on this page, only their reference. To order the book in either print or PDF form, click here. ©2009, 2010 by Craig Shallahamer. This is copyrighted material. Please—Out of respect for those involved in the creation of the book and also for their familes, we ask you to respect the copyright both in intent and deed. Thank you. ------------------------------- * Flag: The flag is a status of the transaction and can take on many values. The following are the most common: * ---- means the transaction is active; that is, DML is occurring and the transaction has not been committed or rolled back. * --U- means the transaction has committed, so any row data referencing the ITL is not involved in an active transaction and is therefore not locked. The transaction's row data may not be consolidated. By consolidated I mean, for example, if a column was updated, both the before and after values can remain in the row data. Please—Out of respect for those involved in the creation of the book and also for their familes, we ask you to respect the copyright both in intent and deed. Thank you. |
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