Skip to content
Opinionated SQL
When no one else will tell you that you're holding it wrong...
  • Home
  • Who and Why
  • Send Me Your Thoughts

Tag: SQL Server

Demystifying Dumps: Stalled Dispatcher

December 1, 2021 Sean Gallardy 1 Comment

Hey Dispatch, We Have a Code 8 If you’ve been following with the series of demystifying dumps then you’re probably…

Continue Reading →

Posted in: Dumps, SQL Server Filed under: Demystified, Dump, Dumps, Non-Yielding, SQL Server, stalled, stalled dispatcher, Windows, Windows Server

Demystifying Dumps: Non-Yielding (Stalled) IOCP

November 18, 2021 Sean Gallardy 2 Comments

What’s an IOCP? IO Completion Ports are a set of Windows APIs which allow for efficient, fast, multithreaded asynchronous IO.…

Continue Reading →

Posted in: Dumps, SQL Server Filed under: Debugging, Demystified, Dump, Dumps, IOCP, Non-Yielding, SQL Server, Windows, Windows Server

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…

Continue Reading →

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

Demystifying Dumps: Access Violation

August 29, 2021 Sean Gallardy 1 Comment

Access Violations (AV) are another common error that will cause SQL Server to take a memory dump. These can occur…

Continue Reading →

Posted in: Dumps, SQL Server Filed under: Access Violation, Debugging, Demystified, Dump, Dumps, SQL Server, Windows, Windows Server

Demystifying Dumps: Non-Yielding Scheduler

August 23, 2021 Sean Gallardy 6 Comments

One of the most common items that will cause a memory dump in SQL Server is a non-yielding scheduler (generally…

Continue Reading →

Posted in: Dumps, SQL Server Filed under: Debugging, Demystified, Dump, Dumps, Scheduling, SQL Server, SQLOS, Threads, WinDBG, Workers

olved steries #2 – Slow Restore

August 8, 2021 Sean Gallardy 1 Comment

Issue Introduction In this olved stery the problem comes as a slow database restore. That’s what I was given, that’s…

Continue Reading →

Posted in: NotASQLServerProblem, olved stery, Performance, SQL Server Filed under: Backups, network latency, olved stery, Performance, restores, SQL Server

Possible configuration error: 1000000 IO requests allocated

May 23, 2021 Sean Gallardy 1 Comment

You’ve won! If, somehow, you’ve managed to see this error in your errorlog then congratulations, you’ve won an instance of…

Continue Reading →

Posted in: Performance, SQL Server, Storage Filed under: Asynchronous IO, Performance, SQL Server, Storage, Weird Errors

olved steries #1 – SQL FCI Failovers

April 29, 2021 Sean Gallardy 7 Comments

Overall Introduction I’ve had some feedback that people would like to know some of the stuff I see and how…

Continue Reading →

Posted in: NotASQLServerProblem, Performance, Security, SQL Server Filed under: Always On, Cheater Cheater, Drivers, FCI, GottaLoveSecurity, HADR, IRPs, NotReallyASQLProblem, olved steries, Security, SQL Server, Windows IO

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…

Continue Reading →

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…

Continue Reading →

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

Post navigation

Page 2 of 4
← Previous 1 2 3 4 Next →

Subscribe via RSS!

Recent Comments

  • happydba on olved steries #3 – SQL Agent Eating Memory
  • Sean Gallardy on Non-WSFC Dumping Woes – Assert in ucsconnectionsend.cpp
  • Sean Gallardy on Non-WSFC Dumping Woes – Assert in ucsconnectionsend.cpp

Archives

  • May 2023
  • April 2023
  • March 2023
  • January 2023
  • November 2022
  • October 2022
  • May 2022
  • March 2022
  • January 2022
  • December 2021
  • November 2021
  • September 2021
  • August 2021
  • May 2021
  • April 2021
  • March 2021
  • February 2021
  • January 2021
  • September 2020
  • August 2020
  • June 2020
  • May 2020
  • January 2020
  • September 2019
  • June 2019
  • May 2019
Copyright © 2019 Opinionated SQL