Concurrency in database systems: a simulation study

  • Authors:
  • Rudolf Munz;Gunter Krenz

  • Affiliations:
  • Technical University of Berlin, Otto-Suhr-Allee 18/20, VSH 222, D 1000 Berlin 10;Technical University of Berlin, Otto-Suhr-Allee 18/20, VSH 222, D 1000 Berlin 10

  • Venue:
  • SIGMOD '77 Proceedings of the 1977 ACM SIGMOD international conference on Management of data
  • Year:
  • 1977

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Abstract

A simulation model of concurrent updates in a database system is presented. This model is used, to answer the following questions: How frequent are deadlocks in certain environments? What about concurrency and wait-time of user processes as a function of the synchronization method used? In case of a deadlock what are useful criteria to select the process to be rolled back? How many checkpoints make sense?