What To Watch When Using VSS Snapshots

Erik Darling shows us the wait stats associated with the Volume Shadow Copy Service (VSS):

A while back I wrote about the Perils of VSS Snaps.

After working with several more clients having similar issues, I decided it was time to look at things again. This time, I wanted blood. I wanted to simulate a slow VSS Snap and see what kind of waits stats I’d have to look out for.

Getting software and rigging stuff up to be slow would have been difficult.

Instead, we’re going to cheat and use some old DBCC commands.

This one almost got the “Wacky Ideas” tag but I’m grading on a curve for that category.

Related Posts

Azure Blob Storage and Data Lake Storage Gen2

Melissa Coates shows what you need to know about Azure Blob Storage with Azure Data Lake Storage Gen2: – You may need to consider separate storage accounts if you need to segregate access control (RBAC), virtual networks, access keys, and the like. (Note that RBAC can also be set at the container level too, but […]

Read More

When Faster Disk Increases WRITELOG Waits

Paul Randal explains that WRITELOG waits can potentially increase as you get faster disk: I was contacted last week by someone who was confused about the WRITELOG wait type. They were seeing lots of these waits, with an average wait time of 18ms. The log was stored on a Raid-1 array, using locally-attached spinning disks in […]

Read More

Categories

August 2018
MTWTFSS
« Jul Sep »
 12345
6789101112
13141516171819
20212223242526
2728293031