This video provides information on how to find out the bottleneck that could cause slowness in a session run by a quick examination of the Powercenter session log.
How to unassign services from an expired key and assign them to a valid key in 9.1.0 and 9.5.1
How to automate the repository and domain back up process for disaster recovery in PowerCenter
How to find in which host the Repository Integration service is running in a multi node domain