The Windows NT 4.0 Performance Monitor log can grow to a maximum size of 2.1GB.
When the NT Performance Monitor log reaches this size, the file becomes corrupt beyond this point.
Microsoft claims that the Windows NT 4.0 Resource kit contains 'Performance Data Logger', which can output only the counters you select.
In Windows 2000, the Performance Monitor log has a 1GB limitation, and stops recording when the limit is reached.
In Windows 2000, you can use Binary Circular Logging, which overwrites the oldest data, instead of stopping. The log can be scheduled, starting and stopping on a time interval.
If you need a larger Windows 2000 Performance Log, you can use Perfmon4, which allows a 2GB limit.