Diagnosis
Paging In occurs when a process requires access to data that is not inthe main memory. The operating system then receives the command to pagein the appropriate page. The requesting process cannot proceed untilthis is done.

System Response
In principle, paging always reduces performance. Paging in of pages is,however, less critical for most operating systems - a page in alsooccurs when a program is started, and this does not necessarily lead toperformance problems.
If the paging out of pages is greater than the paging in, the systemincreases the size of the paging file - therefore the overload on themain memory increases.

Procedure
High levels of paging can have the following causes:

• Too many processes are running on the server


• The main memory is too small for the current demand

You an avoid a high level of paging by taking the following measures:

• Better distribution of running processes on various servers


• Better distribution of running processes to periods of low load


• Install more main memory