Why is TempDB so big?

Question

something made tempdb grow because the space was needed.it might be a developer doing select * from MillionBillionRowTable into #tmp, it might be rebuilding indexes with SORT_IN_TEMPDB, it might be just normal for your server because it needs to use temp to build up intermediate results for queries. 13 мар. 2012 г.

Why is TempDB growing so large?

There are many reasons for uncontrolled TempDB growth events. Much like your operating system has a page file to handle memory overflows, SQL Server uses TempDB like a page file. The most common occurrence of this is when a query “spills” to TempDB.

How do I reduce my TempDB size?

use tempdb go dbcc shrinkfile (tempdev, 'target size in MB') go -- this command shrinks the primary data file dbcc shrinkfile (templog, 'target size in MB') go -- this command shrinks the log file, examine the last paragraph.

Why is TempDB full?

When investigating a TempDB issue like this, most simply restart the SQL Server instance. It's easy to see why they do – the issue quite often locks up completely, and if a customer wants their server to work again ASAP, then a restart is almost inevitable. A restart will tackle the symptom, but not the cause.

How big should my TempDB be?

TempDB should be sized based on the size of the drive it's on (and it should be on its own drive). Generally speaking you should have one TempDB file per CPU core (up to 8) and one TempDB_Log file. So... divide total space on the drive by (number of CPU cores + 1).

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