This paper presents an integrated database benchmark suite, which is named SIMS. SIMS offers generic benchmarks, custom benchmarks, and hybrid benchmarks to users on a unified Web interface. Users can run benchmarks in realistic environments by performing the workload generation facility of SIMS, which generates composite workloads similar to those of the real world. Using SIMS, users can easily implement new custom and generic benchmarks in SIMS. An illustrative demonstration to add a new custom benchmark to SIMS is presented.