Effect of transaction start time interval on the performance of optimistic concurrency control scheme in mobile environment

Optimistic concurrency control technique is widely used as non-locking scheme to control concurrent access in mobile database environment. One of the key parameter that dictates the performance of optimistic scheme is the transaction start time interval. However, most of the existing work uses different values of this key parameter with no justification on its performance implications on the overall scheme. This paper evaluates the effect of different transaction start time intervals on the performance of optimistic strategy in terms of aborted transaction rate and response time. Simulation results shows that transaction start time interval of 300 milliseconds incurred less number of aborted transactions without sacrificing response time.