Unified fine-granularity buffering of index and data: Approach and implementation

Qiang Cao, Josep Torrellas, H. V. Jagadish

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Disk I/O is recognized as a major performance bottleneck in many database applications. Consequently a topic of considerable study in database systems has traditionally been buffer management. Recently, disk pages have been increasing in size, enabling more and more data to fit in a single page. Such a trend suggests that buffering the data at a grain size finer than a page may use memory better. As a result, there has been some interest in fine-granularity buffering. Past approaches to fine-granularity buffering have proposed buffering either data tuples alone or index entries alone. In this paper, we propose a scheme to support fine-granularity buffering of both index and data entries in a unified manner. The scheme, which we call Hot-Entry buffering, can be used in combination with conventional page-level buffering. Through the experimental evaluation of a simple system, we demonstrate the benefits of our scheme over conventional page-level buffering, and over index-only and data-only fine-granularity buffering. In particular, we show that, for a range of parameter values, our buffering scheme speeds-up query execution by 20-60% relative to page-level buffering only, and by 10-20% relative to the best of index-only or data-only fine-granularity buffering.

Original languageEnglish (US)
Title of host publicationProceedings - IEEE International Conference on Computer Design
Subtitle of host publicationVLSI in Computers and Processors
Number of pages12
StatePublished - 2000
Event2000 International Conference on Computer Design - Austin, TX, USA
Duration: Sep 17 2000Sep 20 2000


Other2000 International Conference on Computer Design
CityAustin, TX, USA

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering


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