I have recently installed SQL 2005 Express and Symantec Backup Exec for Windows 2003 SBS. I have not created any backup jobs and do not have an Active SQL DB just yet. However the following Information Events are being logged under Application Event every 5 minutes. Is this normal and is it necessary? The following 2 Events are shown below.

Event Type: Information
Event Source: MSSQL$BKUPEXEC
Event Category: (2)
Event ID: 17137
Date: 1/2/2008
Time: 1:15:40 PM
Computer: SBS01
Description: Starting up database 'BE_DLO'.

2-4 events:
Event Type: Information
Event Source: MSSQL$BKUPEXEC
Event Category: (2)
Event ID: 2803
Date: 1/2/2008
Time: 1:15:41 PM
Computer: SBS01
Description:
SQL Server has encountered 1 occurrence(s) of cachestore flush for the 'Bound Trees' cachestore (part of plan cache) due to some database maintenance or reconfigure operations.

SQL Server has encountered 1 occurrence(s) of cachestore flush for the 'SQL Plans' cachestore (part of plan cache) due to some database maintenance or reconfigure operations.

SQL Server has encountered 1 occurrence(s) of cachestore flush for the 'Object Plans' cachestore (part of plan cache) due to some database maintenance or reconfigure operations.