Diagnosing Database Restore Wait Times

Bob Ward notes that the “100 percent processed” message doesn’t mean everything is quite finished yet in a database restoration:

Notice the “100 percent…” message has detailed about “bytes processed”. Since my data is around 13Mb this tells me that the progress indicators are all about the data transferred step of RESTORE. Notice the time gap in the messages to “Waiting for Log zeroing…” and “Log Zeroing is complete”. That gap in time is around 2 minutes. Exactly the time it took between the the 100% Complete message in the SSMS Window and the final restore message.

From this evidence I can conclude that having a transaction log file size that takes a long time to initialize can be a possible cause of seeing the behavior of getting the 100% Complete Message quickly but the overall RESTORE takes longer to complete.

There’s a lot worth reading packed into this post, as you’d expect from Bob.  Read the whole thing.

Related Posts

Automatically Fix Those VLFs

Tracy Boggiano has a script which will fix log files with high virtual log file counts: First part of the process if to capture the info from DBCC LOGINFO or if you are ready for 2017 the new dmv sys.dm_db_log_stats into a table you can read later to know how many VLFs exist in your […]

Read More

Schema Comparison With Visual Studio

Arun Sirpal shows off the Schema Compare functionality within Visual Studio: A very common requirement which can be satisfied by various tools. Personally I like using Visual Studio 2017 Community Edition and I thought I would do a quick overview of it. First thing, you can find the download from this link: https://www.visualstudio.com/downloads/  and once installed (making […]

Read More

Categories

April 2017
MTWTFSS
« Mar May »
 12
3456789
10111213141516
17181920212223
24252627282930