SQL Backup Performance Difference between 32bit to 64bit

integragroup

We are trying to understand a performance difference we noticed when recently moved from SQL 2000 (32bit) to SQL 2008 R2 (64bit).

A db that is 105GB was taking 2 1/2 hours to backup to a network drive. This was on a dell 2950 with 4GB and Windows 2003. SQL Backup that latest available.

We moved this db to a dell 2850 with 16GB of ram and Windows 2008 R2 as well as SQL Server 2008 R2. The db has grown to 108 GB during this time, however the backups are now taking 5 hours and 40 minutes.

I understand that a 2950 is a little newer/faster than the 2850, however both have GB nic and both were writing to the same NAS share therefore the two differences we have identified are the 64bit and the 2850.

Any insight on how to approach this SQL Backup wise would be appreciated. We have plans to put Windows 2008 R2 and SQL Server 2008 R2 on the 2950 to run a test if nothing else materializes to see what may be going on. The 2850 has dual (dual core) 3.2GHz processors as well as the 2950 has dual (dual core) 2.00GHz 5130s...

petey

In the SQL Backup help file, look for the 'Optimizing backup speed' topic. Try running the stage 1 and 2 tests, and see if they differ significantly between the 2 servers.

Also, what version of the SQL Backup Agent are you running, as returned by the following:

DECLARE @version NVARCHAR(32) 
EXEC master..sqbutility 1030, @version OUTPUT 
SELECT @version