High log activity <number of>pages/second

The number of log pages written per time unit is very high. Depending on the capability of the current log disks, the physical writing of the logs may create a bottleneck. For each COMMIT, the entire 4KB log page must be written to the disk even if the page is not full. This means that if there are a lot of short transactions a log page may have to be physically written to the disk multiple times. In a multi-user system, the database system attempts to combine the COMMITS from several application tasks into group commits.

If the measured I/O rate is close to the limit of the log disks, you should consider moving the logs to faster disks.