Time-based rebuilding of autonomic table statistics collections

Details Time-based rebuilding of autonomic table statistics collections Time-based rebuilding of autonomic table statistics collections

2011-05-24

2011-05-24

Abel-Jalil, Neveen (Department: 2165)

Data processing: database and file management or data structures

File or database maintenance

Synchronization

Reexamination Certificate

active

07949631

ABSTRACT:
Building database statistics for use by a query optimizer is beneficial but may over utilize system resources. Accordingly, the frequency that statistics are rebuilt is controlled in order to minimize the effect of the system. In particular, the staleness of the data and the time since the last statistics collection are used to determine whether or not to re-collect statistics. Even for relatively stale data, statistics are not rebuilt until a predetermined time period has passed.

REFERENCES:
patent: 2004/0243555 (2004-12-01), Bolsius et al.
patent: 2005/0086242 (2005-04-01), Ngai et al.
patent: 2005/0086263 (2005-04-01), Ngai et al.
patent: 2005/0203940 (2005-09-01), Farrar et al.

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