Research On Memory Management To Improve Performance Of Real-Time Data Processing

Real-time database is the one whose datum and affair has timelinessand apparent sanction, it was also the research hot of modem databasetechnology, and has important application value in industrial domain,especially automation control.Speed of query is the most important factor of real-time databaseperformance, and data scan is the basis operator of query execution.Based on the characteristics of cache, the research focus on memorymanagement, the records of the same database table were compactlystored together in the memory by the memory management, which canimprove the traverse speed of database table. At first, the background, thesituation of the subject and the default of base memory managementmethods in real-time data processing were introduced. Then the thesisintroduced characteristics of cache operation. In the thesis, we designedtwo methods of memory management: multiple bitmap method andvarious-size block method, by comparison, multiple-bitmap method wasdecided as the memory management method of real-time processing.Then the implement of multiple bitmap memory management module was given, the allocate/flee interface of the customized memory managewas as the same as general one, application can apply and free memoryspace conveniently, the memory management module had an interface toset the work parameter to adapting specific circumstances; it can alsocheck whether freeing memory was illegal. The test showed that theperformance of application based on the designed memory managementmethod has been improved obviously. Finally, the thesis made aconclusion and pointed out its further research.