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14 Dell EMC SC Series: Microsoft Exchange Server Best Practices | CML1037
Note: Online database maintenance can have a major impact on snapshot sizes as the online
defragmentation process moves data around and pages are cleared. Although disabling online database
maintenance completely is not recommended, some customers have experienced relief in extreme situations
by throttling the online database maintenance process back to one day per week.
2.5.3 Database fragmentation
Defragmentation of the information storage database occurs after information within the database is deleted,
leaving a data-free page still within the file. Defragmentation has performance implications if not addressed
properly, so it is advantageous to use the built-in information store maintenance.
Fragmentation is limited and contiguity is maintained through the background processes that manage the
databases.