Method and apparatus for obtaining storage information from a transaction log
US6418437B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1998 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Oct 30, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99953
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Initially, a table in the database is baselined. The baselining function is usually built into the database system program which manages the database itself. This baselining procedure generates storage information like the number of rows in the table, the average length of a row, the number of chained/migrated rows, and the average free space per page in the table. This storage information is transferred to a monitoring routine via a transaction log. The monitoring routine accepts the storage information for the table. Next, the monitoring routine monitors the transaction log for entries which alter the storage information initially passed to it. At some point, an entity may wish to know the current storage information for the table. When this occurs, a message is passed to the monitoring routine, and the monitoring routine transfers the storage information to the requesting entity, without accessing the database.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.