The redo queue kept growing on an Always On secondary replica, and the ERRORLOG said version store is full. Here is what I found and why it happened.
SQL Server emergency? Email pinal@sqlauthority.com with URGENT in the subject line.
SQL SERVER – Azure Key Vault Deletion Error – Vault ‘ProdRecoveryVault’ Cannot be Deleted as There are Existing Resources Within the Vault
Not an Azure Key Vault after all: a Recovery Services vault that would not delete. The AzureRM script is retired, and soft delete waits 14 days.
SQL SERVER – Configuration Manager Error: The Server Threw an Exception [0x80010105]
SQL Server Configuration Manager failed with: the server threw an exception [0x80010105]. The usual KB did not apply to Windows Server 2008. Here is the fix.
How to Find Queries Using an Index From SQL Server Plan Cache? – Interview Question of the Week #195
Before I dropped an unused index, my client’s CEO wanted proof. Here is how to find queries using an index from the SQL Server plan cache.
SQL SERVER – How to Change Authentication Mode Using T-SQL Query
A software vendor shipped SQL Express with Windows-only login by mistake. Here is how to change the authentication mode to mixed mode with a T-SQL query.
SQL SERVER – Always On AG – HADRAG: Did not Find the Instance to Connect in SqlInstToNodeMap Key
After unexpected failovers, an availability group would not come online: Did not find the instance to connect in SqlInstToNodeMap key. This is how we solved it.
SQL SERVER – Timeout Occurred While Waiting for Latch: Class FGCB_ADD_REMOVE
Latch FGCB_ADD_REMOVE timeouts mean a data file is growing slowly. Measured on SQL Server 2025: 4 GB of data in 98 ms, 4 GB of log in 2.3 seconds.
SQL Server slow? Let's fix it together in about four hours.
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Who We Are
Pinal Dave is an SQL Server Performance Tuning Expert and independent consultant with over 24 years of hands-on experience. He holds a Masters of Science degree and numerous database certifications.
Pinal has authored 19 books and 125 Pluralsight courses. To freely share his knowledge and help others build their expertise, Pinal has also written more than 5,800 database tech articles on his blog at https://blog.sqlauthority.com.
Pinal is also a CrossFit Level 1 Trainer (CF-L1) and CrossFit Level 2 Trainer (CF-L2).
Nupur Dave is a social media enthusiast and an independent consultant. She primarily focuses on the database domain, helping clients build short and long-term multi-channel campaigns to drive leads for their sales pipeline.
Shaivi Pinalkumar Dave is a book author and a women’s artistic gymnast.

