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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. ------------------------------- * The server process adds the redo bytes it needs to marker MK100 and moves the pointer clockwise, perhaps to marker MK200. * The server process copies its redo into the just-allocated space and releases its redo allocation latch. When redo copy latches are not used by server processes for copying redo into the redo log buffer, the log writer background process will need to acquire all the redo allocation latches, just to make sure it doesn't flush the redo log buffer while server processes are busy copying their redo into the redo log buffer. 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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