Modelling database lock-contention in architecture-level performance simulation

Abstract

Databases are the origin of many performance problems found in transactional information systems. Performance suffers especially when databases employ locking to isolate concurrent transactions. Software performance models therefore need to reflect lock contention in order to be a credible source for guiding design decisions. We propose a hybrid simulation approach that integrates a novel locking model into the Palladio software architecture performance simulator. Our model operates on a row level and is tailored to be used with architecture-level performance models. An experimental evaluation leads to promising results close to the measured performance.