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Category: SQL Server

Availability Group Long Failover Times

April 18, 2021 Sean Gallardy 1 Comment

One of the most common issues I look at from day to day is some variation of the question. “Why…

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Posted in: CUs and GDRs, HA/DR, Performance, SQL Server Filed under: Antivirus, Availability Groups, Drivers, Failover, HADR, Patching, Performance, SQL Server

Undo of Redo – Reverting (and Initializing)

April 12, 2021 Sean Gallardy 1 Comment

Departure Hopefully, you’re not finding this entry because you’re scouring the web for what reverting means while your production server…

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Posted in: HA/DR, Performance, SQL Server Filed under: Always On, Availability Groups, Recovery, SQL Server

Do You Really Have A HA Issue?

March 15, 2021 Sean Gallardy

I tend to be involved in many HA related issues, as is the nature of my current work agreement. The…

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Posted in: HA/DR, Performance, SQL Server Filed under: HADR, Performance, Planning, SQL Server

Refresh DEK for DBID and FileID Errorlog Messages

February 20, 2021 Sean Gallardy

Be Careful What You Wish For Just a quick PSA as I’ve had a bunch of questions come up around…

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Posted in: CUs and GDRs, SQL Server Filed under: CUs, NotAProblem, PSA, SQL Server, SQL2019

Network Throughput Hysteria

January 29, 2021 Sean Gallardy 6 Comments

I Think My Knee Hurts, I Just Can’t Prove It Hopefully, you really do know if your knee hurts or…

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Posted in: HA/DR, SQL Server Filed under: Always On, Gotta Test, networking, SQL Server

VM Backups + SQL HA = SQL AlwaysOff

September 21, 2020 Sean Gallardy 1 Comment

On, Off, On, Off, On… I see this more often than I’d like to, so count this as your PSA…

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Posted in: HA/DR, Maintenance, NotASQLServerProblem, SQL Server Filed under: Backups, HADR, SQL Server, Veeam

Using Distributed Network Names with Availability Groups

August 23, 2020 Sean Gallardy 1 Comment

I’ve been asked this question a few times, so I feel it’s worth writing about, which is, “Are Distributed Network…

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Posted in: HA/DR, SQL Server Filed under: Availability Groups, DNN, FCI, NotQuiteYet, WSFC

Attempting to recycle all monitors that have loaded the DLL sqsrvres.dll or hadrres.dll and you notice a SQL FCI/AG failed health checks

August 20, 2020 Sean Gallardy

I won’t say I told you so… I will, however, point out common AG question #8… I’m not sure why…

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Posted in: HA/DR, Maintenance, NotASQLServerProblem, SQL Server Filed under: HADR, Patching, SQL Server, WSFC

Top Asked Availability Group Questions… and Maybe Some Helpful Tidbits as Answers

June 16, 2020 Sean Gallardy 10 Comments

This is inspired by all the times I am forced to repeat myself. To cut down on hearing my own…

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Posted in: HA/DR, SQL Server Filed under: FAQ, HADR, SQL Server

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

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