IBM BPM, V8.0.1, All platforms > Tuning > Advanced tuning > Database: general tuning
Place database log files on a fast disk subsystem
Databases are designed for high availability, transactional processing and recoverability. For recoverability and transaction management, changes to table data are written to the log before being written to DASD. These changes can be synchronous or asynchronous, but under heavy insert activity the logging can lag behind the table updates, and logging might become a bottleneck.
Therefore, it is advisable to place database log files on a fast disk subsystem so that overall system performance is not adversely affected.