Practical tools for system, network, security, and operations administrators.

DBA-C0055 · Configuration & Tuning

SQL Server tempdb Best Practices

Sketch the tempdb file count. Do not add files during the reading. SQL Server tempdb Best Practices.

Updated 25 October 2026 · Checklist

This is an original planning guide. It is not a vendor manual, an official standard, or legal advice. Example addresses use documentation ranges. Review every command before you paste it.

What this hour is for

The calculator turns a CPU count you type into a file-count sketch. It does not connect to SQL Server and it does not add files.

Do not shrink tempdb to make free space appear. Do not add or move files during the reading.

192.0.2.10, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. A sample password is replaced. It is not a password you keep.

The change you can finish

Apply nothing while you are writing the note. When the lab window opens, it is one change on the database named in the ticket. Read the draft, then the database, then decide.

Rollback is the backup, the file, or the snapshot you saved first. You do not invent a rollback after the only copy is gone.

  1. Type the CPU count.
  2. Read the sketch.
  3. Do not add files.
  4. Do not shrink tempdb.
  5. Stop.

Mistakes that outlive the statement

SQL Server tempdb Best Practices goes wrong in a small set of ways. The list is here so the ticket can forbid them before the window.

Decisions to write down

One decision for SQL Server tempdb Best Practices: The CPU count is written. The sketch was read. Nothing was added. And nothing was shrunk.

Checks before you call it done

Confirm this before you call the change done: The instance is written. The sketch was read. Nothing was added. Nothing was shrunk. And the database is yours. If one of those fails, stop.

Before you leave the database

SQL Server tempdb Best Practices ends when the database in the prompt is the database in the ticket. If it is not, you are on the wrong database. Stop.

The draft stays a draft until a person has read the names in it. A generator does not log into the database. You delete a line that names a host, a database, or an account you did not write down.

192.0.2.10, 198.51.100.0/24, 203.0.113.0/24, and 2001:db8::/32 are documentation. example.com is a documentation name. They belong in the note. They are not values you leave on a database because a draft included them.

prompt-for-this is a reminder that a secret is missing. It is not a password, a key, or a token you save in the ticket or in git. A sample password in a draft is replaced. It is not a password you keep.

One change is the window. If two things move and the result is wrong, you will not know which one did it.

If the same step fails twice, stop for the day. Restore the copy you took first.

A second person reads the database name and the change aloud. If they cannot find them in the ticket, the note is not done.

This page is a planning guide. It is not a vendor manual, not an official standard, and not permission to touch a database you do not administer. You do not disable authentication, a firewall, or TLS to make a check pass.

Tools for this guide

These tools run in the browser on this site. They do not log into your machines.

More in this cluster

The pillar for this page, and the next published pages filed with it.