I meant to write this almost a year ago, but then I was asked to take a look at high cluster service privileged time usage and realized I had forgotten! I guess better late than never? If you’re using WSFC integrated AGs (cluster_type = WSFC) then the cluster database is the location in which availability […]
Read Scale Availability Groups can be pretty useful in the right places and for the right things and were a latest feature update for AGs until Contained AGs came along in 2022. Read Scale AGs don’t integrate with clustering of any type and they behave somewhat as mirroring used to where there is no real […]
There was a question that came up on the MCM mailing list about what are these files: model_msdbdata.mdf, model_msdblog.ldf, model_replicatedmaster.mdf, model_replicatedmaster.ldf? It was pointed out that the files don’t show up in the typical DMVs and seem to not really be used at the moment. These are the databases used as the basis for the […]
Primer If you haven’t already read up on cooperative and preemptive scheduling or aren’t sure what those are, please read the intro to that first, otherwise you’ll be lost. Much as I’ve discussed before, SQL Server uses a cooperative scheduling model. This doesn’t mean that Windows does, nor does it mean Windows will scheduler whatever […]
Update 5/24/2022: I’ve updated the DMV to reflect the various node and witness dynamic settings with a new column at the end of the DMV called number_of_current_votes. This is only in 2022 and will not be backported. Background I’ve now run across a few different instances where the monitoring for quorum was done via this […]
