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Diagram of two NUMA nodes, each with its own bus, CPUs and local memory; a red arrow shows a CPU reaching into the memory of the other node, which is multiple times slower

NUMA in SQL Server: A Lunch Chat About Local and Remote Memory

December 12, 2015
Pinal Dave
SQL Tips and Tricks
Hardware, SQL CPU, SQL Memory, SQL Server, SQL Server Architecture

NUMA in SQL Server came up in a lunch break chat at SQLPass, during my 42 tips session. An attendee asked what NUMA is and when SQL Server got it. Here is the answer I gave, with the history.

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Sql profiler CPU ranking window.

SQL SERVER – Who is consuming CPU on my SQL Server?

October 29, 2015
Pinal Dave
SQL Tips and Tricks
SQL CPU

A corridor question after my MODS session: who is consuming CPU on my SQL Server? Here is how I would find out using SQL Server itself.

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SQL SERVER - Fix: SQL Server CPU Schedulers Offline

SQL SERVER – Fix: SQL Server CPU Schedulers Offline

September 29, 2015
Pinal Dave
SQL Tips and Tricks
SQL CPU

A reader’s 80 core server was not using all cores in SQL Server. Here is how to spot CPU schedulers offline and the usual reasons behind them.

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Gouache painting of a smiling scheduler robot distributing colored blocks to workers on connected gears

SQL Server Scheduler and Operating System Scheduling: Notes

September 17, 2015
Pinal Dave
SQL Tips and Tricks
SQL CPU, SQL DMV, SQL Server, SQL Server Architecture

The SQL Server scheduler decides which ready work gets processor time, on top of the operating system’s own thread scheduling. Tested queries on SQL Server 2025 show runnable, running and suspended tasks under load, and the permission each view needs.

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Gouache painting of four wheelbarrows in parallel each carrying part of a pumpkin pile, one pumpkin painted red

How to Find Queries Running in Parallel in SQL Server

July 25, 2015
Pinal Dave
SQL Performance
Parallel, SQL CPU, SQL Scripts, SQL Server

To find queries running in parallel, read max_dop and the CPU to elapsed ratio from the query stats view, then confirm with the plan XML. This post tests both on a two million row table. It also explains why the same query stays serial until its cost passes the threshold.

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A cheerful man with a beard.

SQL SERVER – Why Haven’t You Disabled CPU Power Saving Yet?! – Notes from the Field #087

July 2, 2015
Pinal Dave
SQL Tips and Tricks
Notes from the Field, SQL CPU, SQL Server

Notes from the Field #087: why you should disable CPU power saving on your SQL Server, and how this one setting can quietly slow queries.

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A speaker badge at a tech conference.

Great Indian Developer Summit 2015: Three SQL Sessions and a CPU Check

May 2, 2015
Pinal Dave
SQLAuthority News
GIDS, SQL CPU, SQL Performance

Great Indian Developer Summit 2015 brought me to Bangalore and Hyderabad for three SQL Server sessions. This page keeps the dates, topics and photos. It also adds a CPU check I would start with today, tested on SQL Server 2025, because one session was about CPU performance.

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