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Sql Server Tempdb Configuration![]()
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To move tempdb files, you simply need to do the following: alter database tempdb modify file ( name = tempdev, filename = 'C: YourNewTempdbDir tempdb.mdf' ) go alter database tempdb modify file ( name = templog, filename = 'C: YourNewTempdbDir templog.ldf' ) go If you want to add a new file to tempdb, you simply need to do the following (provided you want to add it to the PRIMARY filegroup, or create your own): alter database tempdb add file ( name = tempdb2, filename = 'C: YourNewTempdbDir Tempdb2.ndf' ) go For these changes to take effect, you will need to restart the SQL Server service. So as far as minimizing downtime goes, you are constrained to the amount of time it will take for the service restart. You don't have to worry about moving the pre-existing tempdb database files, as SQL Server always recreates the files and the new locations/files will be created upon service startup. As for the '1 tempdb data file per core', that is largely a myth. The correct approach is to monitor tempdb file contention for the Page Free Space (PFS), Global Allocation Map (GAM), and the Shared Global Allocation Map (SGAM) pages. Please reference that looks through the sys.dmoswaitingtasks DMV to see how much tempdb file contention there is.
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Then you need to go off of this, instead of just blanketing tempdb with the same amount of files as there are cores. It's the more advisable approach.
. Find product guides, documentation, training, onboarding information, and support articles. Submit a ticket for technical and product assistance, or get customer service help. Learn through self-study, instructor-led, and on-demand classes with the SolarWinds Academy. Download the latest product versions and hotfixes. Manage your portal account and all your products. Renew to download the latest product features, get 24/7 tech support, and access to instructor-led training.
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