The first form of this command will cause all uncommitted writes to be physically written to the hard-drive. By default, the writes will be buffered and only written when required.
The second form of this command allows you to change the way that buffering takes place. If the Flush Mode is set to 0, then writes will be buffered. If the Flush Mode is set to 1, then no buffering will take place, and all writes will be immediately written to disk - this will result in slower updates but better integrity of the file in the event of a program or system crash. |