Patent ID: 7801932
Filing Date: 2010-09-21
Classification: G06F,Y10S

Abstract:
1. A computer implemented method for using undo hints to speed up segment extension in a database, comprising: determining whether there is any available space for segment extension based at least in part upon a current undo retention; when there is not any said available space for segment extension, accessing an undo hint from a set of undo hints; decreasing, by using a processor, the current undo retention based at least in part upon the undo hint, wherein the undo hint contains an identifier to a space of an undo record that has not expired but where the undo record would be an expired undo record if the current undo retention were to be reduced to a particular undo retention, wherein the particular undo retention is the current undo retention reduced by a value; allocating the space of the expired undo record to a segment; and storing information associated with the space in a volatile or non-volatile computer-usable medium or displaying the information on a display device.