is a natural
phenomenon caused by normal system activity like adding, deleting, and
extending files. When files are split into many fragments, the time needed
to access the parts of a file that make up the whole increase dramatically.
This is true for all files, including Domino databases. When multiplied
by the hundreds or thousands of databases that can reside on a server (not
to mention the thousands of other files on a server), this can add up to
a significant reduction in system capacity. To ensure the optimal performance
of your Domino server, we recommend defragmenting the file system at least
once a month.