If the status of principle and mirror database are in status “Suspended” mean the synchronization is
pause but all SQL in mirroring environment are still reachable. This can be happened in case of
administrator set the mirroring to “Pause” for server maintenance or temporary stop for server
movement.
When SQL mirroring environment are in this status, change occurred in the principle database will be
pending send. If the mirroring is in this status too long will generate a lot of pending changed data
can be cause of high server and network utilize after the mirroring status has been resumed.
To resume the mirroring, see guideline in “SQL Mirroring Administration”