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VLDB
2001
ACM
190views Database» more  VLDB 2001»
14 years 3 months ago
LEO - DB2's LEarning Optimizer
Most modern DBMS optimizers rely upon a cost model to choose the best query execution plan (QEP) for any given query. Cost estimates are heavily dependent upon the optimizer’s e...
Michael Stillger, Guy M. Lohman, Volker Markl, Mok...
SIGMOD
2004
ACM
147views Database» more  SIGMOD 2004»
14 years 11 months ago
Robust Query Processing through Progressive Optimization
Virtually every commercial query optimizer chooses the best plan for a query using a cost model that relies heavily on accurate cardinality estimation. Cardinality estimation erro...
Volker Markl, Vijayshankar Raman, David E. Simmen,...
OOPSLA
2007
Springer
14 years 5 months ago
Scalable omniscient debugging
Omniscient debuggers make it possible to navigate backwards in time within a program execution trace, drastically improving the task of debugging complex applications. Still, they...
Guillaume Pothier, Éric Tanter, José...
ASPLOS
2004
ACM
14 years 4 months ago
Low-overhead memory leak detection using adaptive statistical profiling
Sampling has been successfully used to identify performance optimization opportunities. We would like to apply similar techniques to check program correctness. Unfortunately, samp...
Matthias Hauswirth, Trishul M. Chilimbi
WSC
1997
14 years 15 days ago
Multiplexed State Saving for Bounded Rollback
Optimistic parallel discrete event simulation (PDES) uses a state history trail to support rollback. State saving strategies range from making a complete copy of a model’s state...
Fabian Gomes, Brian Unger, John G. Cleary, Steve F...