MAXDOP limits supported parallel index operations without changing unrelated instance settings. I choose the ceiling from the maintenance workload.
Query Store Wait Stats: Why a Query Was Slow, Not Just That It Was
Read Query Store wait stats by query, plan, interval, and category, then compare matched windows with execution counts and capture coverage.
Large Memory Servers: How SQL Server Scans the Buffer Pool
SQL Server scans the buffer pool during startup, backup, restore and DBCC, and large memory servers feel it most. An extended event records the scans, shows which commands start one and how many tasks each uses. The last sections explain what SQL Server 2022 changed.
SQL Server 2022 – Thread Management for Performance Improvement
I had a great discussion about Thread Management for Performance Improvement with my client, who recently hired me for Comprehensive Database Performance Health Check.
SQL Server 2022 Performance – Buffer Pool Scan
One aspect that can significantly impact performance is scanning the buffer pool in Microsoft SQL Server. This blog explores buffer pool scan.
PSPO Plan Variants: One Query, Several Plans in SQL Server
PSPO plan variants let SQL Server cache up to three plans for one parameterized query when the data is very skewed. This post builds a skewed table, shows two variants with different reads for three calls, compares the same calls with the feature off, and explains when PSPO does not apply.
Chatty Applications: Finding Many Tiny Queries per Second
Diagnose chatty applications with batch rates, cached executions, bounded session event counts, and measured round trips per user action.