Misaligned Log IOs

Anup Warrier diagnoses a potential performance issue due to disk misconfiguration:

From the above screenshots, you can clearly see that the disks are not aligned.

So, what’s a big deal about this?  When disks for primary and secondary are not aligned, then the AG synchronization process can run slow. This is not something which you would like to see in a Production server.

Read the whole thing.

Related Posts

Read-Only Replicas With Filled TempDB

David Fowler explains what could cause a read-only secondary replica in an Availability Group to have its tempdb fill up: When I have an issue with tempdb filling up the first thing that I usually do is try to figure out exactly what the space has been allocated to. You can quickly figure out what […]

Read More

Adding Instance Name To The AlwaysON_health Session

Jonathan Kehayias shows how to add server_instance_name to the AlwaysON_health event session to make Availability Group troubleshooting easier: The AlwaysOn_health event session in Extended Events is intended to make analyzing problems with Availability Groups possible after they have occurred.  While this event session goes a long way towards making it possible to piece together the […]

Read More


November 2016
« Oct Dec »