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Tag: Monitoring

olved steries #4 – SQL Won’t Shut Down!

July 8, 2023 Sean Gallardy

Issue Introduction I was sent a quite an interesting email stating that SQL Server would not shut down. Attempting to…

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Posted in: olved stery, SQL Server Filed under: Debugging, Dump, Monitoring, olved steries, olved stery, service broker, SQL Server, WinDBG

What Are PREEMPTIVE Waits And How Can They Kill Performance

November 27, 2022 Sean Gallardy 3 Comments

Primer If you haven’t already read up on cooperative and preemptive scheduling or aren’t sure what those are, please read…

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Posted in: DMVs, Performance, SQL Server, Waits Filed under: Debugging, Demystified, Monitoring, Non-Yielding, Performance, SQL Server, Threads, Wait Types, WinDBG, Windows

Understanding the HADR_SYNC_COMMIT wait

September 22, 2021 Sean Gallardy 2 Comments

Initially I thought to myself, “this is the most misunderstood wait type that exists in the HA space for SQL…

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Posted in: HA/DR, SQL Server, Waits Filed under: AGs, Always On, Availability Groups, HADR, HADR_SYNC_COMMIT, Monitoring, SQL Server, Synchronous Commit, Threads, Wait Types, Waits

Error 35217 And Availability Groups /SMH

May 9, 2020 Sean Gallardy 1 Comment

Well That Escalated Quickly… Error 35217 translates to, “The thread pool for AlwaysOn Availability Groups was unable to start a…

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Posted in: HA/DR, SQL Server Filed under: HADR, Infrastructure, Monitoring, Performance, SQL Server, Threads, virtualization

Stop using Sys.dm_hadr_cluster_members for “quorum” information

Sean Gallardy 1 Comment

Update 5/24/2022: I’ve updated the DMV to reflect the various node and witness dynamic settings with a new column at…

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Posted in: DMVs, HA/DR, SQL Server Filed under: DMV, DoesntWorkLikeYoudThink, HADR, Monitoring, SQL Server, WSFC

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