SMA and LLA Guide : Configuration parameters for a diskless server : Configuration parameters that do not apply to diskless engines
  
Configuration parameters that do not apply to diskless engines
The following configuration file parameters (grouped by section) are disabled or inoperable for diskless servers. These parameters affect behaviors that do not apply to diskless engines.
Parameter
Description
[General] Section
CheckpointInterval
This parameter is disabled since checkpoints do not apply to diskless servers.
[IndexFile] Section
ReadAhead
No physical read from the database file, so this parameter is inoperable
PreFlushPercent
No physical write to the database file, so this parameter is inoperable
[Logging] Section
LogEnabled
This parameter is disabled since transaction logging is always disabled for diskless servers.
Note Diskless mode supports transaction rollback only. Transaction rollbacks are typically used when some failure interrupts a half-completed transaction. The diskless mode does not support roll-forward recovery.
See also
Configuration parameters for a diskless server