Checking Page Fault Rates (UNIX)

Unlike Windows, pages are swapped out to the working memory under UNIX if the space is needed, and then they are overwritten. This swapping out uses up valuable time and performance.

Transaction ST06 displays a small [Pages out] value and a similar [Pages in] value in a system with high performance. The [Pages out] value is very important when assessing system performance.

Call transaction ST06. The first screen contains the current values for [Pages in]/s and [Pages out]/s under Memory.

To display the selection screen for more detailed information, choose Detail analysis menu. By choosing Memory in block Previous 24 Hours, a list of [Pages in] and [Pages out] values in the preceeding 24 hours is displayed. The following screen displays this report.