PAGELATCH_UP waits mean that sessions queue for the same page in memory, and that page can be named. This post reads the waiting sessions, turns the resource into a database, a file and a page, and tells an allocation page from an ordinary one. It then lists the fixes for tempdb and for a user database.
SQL SERVER – Automatic Seeding of Availability Database ‘DB’ in Availability Group ‘AG’ Failed With an Unrecoverable Error
Automatic seeding of availability database failed with an unrecoverable error: it showed on the secondary, then vanished. Here is what ERRORLOG said.
Consulting 103 – Why Do I Assure SQL Server Performance Optimization in 4 Hours?
See how performance optimization in 4 hours follows focused triage, reviewed fixes, and a written action plan for the work that remains.
Consulting 102 – What Do I Promise in Every Engagement?
Know what I promise in every engagement, define a useful baseline, and compare performance changes without trusting a speed claim.
WRITELOG Waits: Finding What Slows Transaction Log Writes
Diagnose WRITELOG waits with log-file latency, commit patterns, and measured choices for batching, storage, and durability.
Reduce IO Waits in SQL Server: Read the Waits First
To reduce IO waits in SQL Server, first name the wait. This post explains the main IO wait types and measures two of them for a single session on a demo database. It then shows how to check file latency and which fix matches each wait.
Diagnosing Blocking Chains With sys.dm_exec_requests
Trace blocking chains from active requests to a candidate head session, inspect sleeping transactions, and verify the owner before action.