Dual-Buffering Strategies in Object Bases
- Alfons Kemper
- Donald Kossmann
- 1993, Technical Report MIP-9309, Universität Passau
- buffer management
- performance evaluation
- object-oriented database systems
- client-server architecture
You can download the
whole postscript file.
In this work, we devise and evaluate control strategies for combining
two potentially powerful buffer management techniques in object bases:
We distinguish two dimensions for exerting control on the buffer pool:
- buffer pool segmentation with segment-specific replacement criteria and
- dual buffering consisting of copying objects from pages into object buffers.
Along both dimensions, we distinguish an eager and a lazy
strategy. Our extensive experimental results indicate that a lazy object copying
combined with an eager relocation strategy is almost always superior
and significantly outperforms page-based buffering in most applications.
- the copying time determines when objects are copied
from their memory-resident home page and
- the relocation time determines the occasion on which a
(copied) object is transferred back into its home page.
Uwe Röhm, 09.05.1994; Last Change: 07.11.94