Signal waits are the part of every wait that a task spends in the queue for a free CPU. This post ranks the wait types by signal time, shows why timer waits ruin the total share, and samples the signal share into a small table so a whole working day can be read interval by interval.
THREADPOOL Waits: When Raising Max Worker Count Helps
THREADPOOL waits mean tasks waited for a worker thread. Five read-only queries separate real thread starvation from blocking and busy CPUs. The post lists five signs and shows how to raise the cap in small steps.
Max Worker Count: Why Typing 10000 Slowed a Server
Max worker count looks like a speed dial but behaves like a safety limit. A client typed 10000 on an 8 processor server and slowed it, and a reset to 0 fixed it in minutes. Two read-only queries show your value and whether workers run short.
Frequently Run Stored Procedures: Find Them in the Cache
Frequently run stored procedures leave an execution count in the plan cache. A tested demo ranks three procedures by count, reads and calls per minute. It also shows what the cache forgets and when to use Query Store instead.
Page and Row Compression in SQL Server: Estimate, Enable, Remove
Page and row compression shrink a table or index, and each one is a single ALTER statement. This post estimates the savings first, turns each level on and off in a demo, and measures what the page rebuild costs in CPU.
MAXDOP Guidelines: Audit CPU and Memory Settings in SQL Server
MAXDOP guidelines start from the number of CPUs and NUMA nodes on the server. This post builds three read-only queries that show those facts, the current MAXDOP and cost threshold, and the memory settings. It also shows how to read the answer without changing anything.
SQL SERVER – Difference Between Status in SP_Who2 – Running, Pending, Runnable, Suspended, Sleeping
What is the difference between Running, Runnable, Pending, Suspended and Sleeping status in sp_who2? I explain each one simply, in terms of CPU and IO.