When the service account is removed from local Administrators group, SQL Server may not start. Here is why, and the minimal permissions it needs.
Script Upgrade Mode in SQL Server: Login Failed (Error 18401) While Deleting a Collection Set
Script upgrade mode can reject logins for a while after a SQL Server update, and in this 2017 client case the startup log stopped at a collection set cleanup. This post shows how to read error 18401, check whether the upgrade still moves and size the msdb logging tables with tested queries.
SQL SERVER – Clustered SQL Resource Not Coming Online
Clustered SQL resource stuck in online pending, yet the service started fine from services.msc. The cluster log showed a login failure. Here is the fix.
SQL SERVER – Unable to Add Server Name SQLAUTH-LISTENER to Transport Device NetBt_If4 Status 2 – Windows Cluster
An availability group listener would not come online. The cluster log said unable to add server name to transport device NetBt_If4, status 2.
SQL SERVER – FIX: Error: 913, Severity: 16 – Could Not Find Database ID 3. Database May Not be Activated Yet or May be in Transition – SQL Service
SQL Server would not start and the ERRORLOG showed Error 913: could not find database ID 3. Database may not be activated yet. Here is the fix.
SQL SERVER – Unable to recycle Errorlog – sp_cycle_errorlog – OS error 1392
On a clustered server the nightly ERRORLOG cycling stopped, and sp_cycle_errorlog failed with OS error 1392. Here is what that means and how we fixed it.
Slow Database Creation in SQL Server: Causes and Fixes
Slow database creation in SQL Server comes down to its files: how big they are, and whether SQL Server must zero every byte. This post checks the three usual suspects, the size of the model database, instant file initialization and the log file, and times each one with a script. It also shows the wait type to look for while a large CREATE DATABASE runs.