TempDB is part of MS SQL Server. It's a system database that functions as a storage area for temporary tables, internal objects and row versions.

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Performance Metrics for TempDB [duplicate]

I've been tasked with gathering performance metrics on a few database servers that have one TempDB data file. It seems prevailing wisdom is to have one TempDB data file per core up to a certain ...
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Major Discrepancy Between SQLIO IOPS/Throughput Stats and DBCC CHECKDB Operations

I'm conducting time trials on a new SSD array running both SQLIO tests and a real-world workload of DB restores and DBCC CHECKDB calls. I'm seeing a major discrepancy between the IOPS and throughput ...
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Find which session is holding which temporary table

We have a SQL Server 2005 database the temp database has become full. By going into SQL Server Management Studio I can see all the temporary tables in the tempdb. Is it possible to tell which session ...
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What are the most effective techniques to reduce SQL Server disk space use when updating all rows in a very large table?

Given a SQL Server table with a large number of rows no columns with large-value data types multiple indexes more allocated space than available for the largest possible transaction log size a ...
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52 views

TempDB causing high IO writes - dependent on server's max memory setting [duplicate]

I have a mirrored SQL Server 2012 database. The first server has a hugh tempdb write IO load when the maximum memory limit is set above 8192 mb. These 8192 where the original setting for both the ...
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503 views

Tempdb data file disappearing

I recently moved my Temp database files onto a separate drive (I had two data files and one log file). However, after restarting the server, my second data file disappeared both from the file list on ...
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1answer
534 views

Different results from sys.dm_db_file_space_usage with database prefix

To make it simple: According to MSDN (link) among other sources, you can get the amount of current free space in tempdb by using the following bit of TSQL: -- MSDN version SELECT ...
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1answer
927 views

Does MAXDOP affect the number of tempdb data files I should create?

From what I have read, best practices for configuring tempdb includes creating multiple data files. The rule of thumb as I understand it is if you should create the same number of data files as you ...
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1answer
156 views

TEMPDB Log Files [duplicate]

Do I want to store the tempdb log files on the same drive as my user database log files, the same drive as the tempdb data file, or on a separate drive?
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Issues with TempDB mdf file ever increasing

I have a tempdb growth issue. Let me preface everything by giving my tempdb settings. Even with no queries running on the database/server tempdb keeps on increasing in size, at first rapidly and ...
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2answers
841 views

What are the options of reducing tempdb latency?

Took the job of monitoring and tununing a SQL Servers 2012 Enterprise Ed. SP1 (64 bit) on Windows Server 2008 R2 Standard Ed. All of them are running inside virtual machines. One SQL Server per a ...
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1answer
435 views

TEMPDB Round Robin is not working!! It is filled up

I have a 16 Core CPU processor and I have created 8 tempdb datafiles with initial size as 2,000 MB with 10% growth restricted to 10,000 MB. The log file is unrestricted and it is in simple recovery ...
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1answer
144 views

Does RCSI use less or same space than SNAPSHOT? Why?

Trying to better understand row-versioning based transaction isolations - RCSI (Read Committed Snapshot Isolation and SNAPSHOT) - in SQL Server... MSDN online article "Choosing Row Versioning-based ...
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1answer
69 views

Why - read but not update ops fail in case of lacking space in tempdb database?

MSDN online article "Choosing Row Versioning-based Isolation Levels" states: "tempdb must have enough disk space for the version store. If there are very long-running transactions, all the ...
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2answers
180 views

Post mortem on tempdb transaction log after instance restart?

TempDB transaction log filled up and I had to restart SQL Server as a result. After the restart, is there any way to see what caused the transaction log to fill up in the first place?
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1answer
3k views

Broken tempdb location and can't recover

Made a mistake and mistyped an alter database command for tempdb. Now the instance won't start. I can't start in single user mode using -m as it states the tempdb could not be found. I tried using: ...
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1answer
642 views

Dropping large clustered primary key fills up tempdb

Due to one of our tables growing outside of the range of an INT, something that wasn't predicted when the DB was produced, we're need to change the PK field to a BIGINT instead. We are however ...
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1answer
2k views

Create temporary tables per session in a DB other than tempdb

Using SQL Server, Is there a way to create a temporary table per user session in a user database in the same exact way they are created in tempdb? Using tempdb is fine in most cases, but some of the ...
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remote query bloats tempdb [closed]

I have someone who retrieves data from a linked server to a new table as following: * newly edited - turns out there's multiple queries executed * select * into dbDestination.dbo.tableDestination ...
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1answer
233 views

SQL Server 2008R2 Cluster: Spread tempdb over several files AND shrink original single file

On my SQL 2008 R2 active/passive cluster, I've received an error message regarding I/O requests on tempdb.mdf taking longer than 15seconds. Googled that and it as suggested I spread tempdb over ...
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1answer
1k views

TempDB on Solid State Drives on SQL Server Cluster

Can solid state drives be used for the TempDB on a SQL Server failover cluster if they are local drive on both machines? It is supported in 2012 but our cluster is a SQL 2005. The application that it ...
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1answer
414 views

Under what conditions does SQL Server encrypt tempdb?

When does tempdb get encrypted with Transparent Data Encryption? What configuration, etc, causes tempdb to be encrypted this way?
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473 views

Simple update query balloons tempdb

I am trying to do a bulk update of a column from a csv file, however when I do the actual update operation my tempdb balloons to over 20 GB in size (overtaking the entire size of the SSD the tempdb is ...
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How to improve TempDb on RAMDisk showing performance on par with physical hard drive [closed]

Given 2 SQL Server Instances where the second instance is configured with a RAMDisk for tempdb and the following test case. -- Create source data select top(1000000) * /* ~10 cols */ into #t1 from ...
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2answers
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TempDB Version Store cleanup

From what I can find the version store will only clean up versions that are older than the oldest active transaction. Question: Is the oldest transaction database specific or will SQL Server keep all ...
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1answer
456 views

TempInsertStateItemShort procedure on ASPState is taking more than 1 second to execute

I'm working on a .NET website who runs in load balance within more than one server and because of that I need to have my session on SQL Server. In the last 2 weeks I've notice that the procedure ...
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762 views

TempDB MDF file huge after update script ran

On the weekend we had a huge deployment run that affected a large chunk of our system. It was all run in one massive transaction (probably the wrong thing to do). As a result our TempDB DatabaseFile ...
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2answers
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tempdb logs on same drive as tempdb data or with other logs? [duplicate]

For many reasons I only have 3 hard drives (RAIDed and in an Always-On AG) for all my database files: D: Data E: Logs F: Tempdb Should the tempdb log file go on F: with the data file(s) or on E:? ...
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1answer
544 views

How to determine cause of runtime increase given two query plans with SpillToTempDb warning

Two actual query plans were captured for two executions of one query: Plan "Fast" took ~1s and occurs about 90% of the time. Plan "Slow" took ~16s. Since the graphical plans look ...
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Best practice for tempdb log file

I have read many blogs here and there about how to configure tempdb data files but i didnt found any information regarding the tempdb log file. Here's the strategy that I'm presently using with my ...
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2answers
242 views

Moving one TempdB on 3 instance server

I have a large virtual SQL Server (Full 2008R2). I run 3 SQL Server instances and would like to relocate the TempdB database file to another location, splitting off from the TempdB log file. The ...
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1answer
345 views

When REBUILDing indexes on SQL Server, what bearing does tempdb & LOG disk speed have?

Say I have the a data disk that is 50x faster than the LOG and tempdb (measured by Random Write speed) disk. (Don't ask why that's something we'll be fixing if needed) I have a table that's got 19 ...
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2answers
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Objects in Tempdb that are not associated with a session

I have a SQL Server 2005 instance where my tempdb i apparently holding on to objects that are not in use anymore. The database has 24gb total and is apparently unable to go below 8gb in use. For ...
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SQL Server 2008 R2 SP1 - Tempdb “Available free space” showing negative value [duplicate]

Please help as this issue is driving me nuts... Tempdb has four data files & one log file. They are all located on the same dedicated drive. When I right click on tempdb in SQL Server Management ...
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3answers
8k views

SQL Server 2008 R2 SP1 - Tempdb “Available free space” showing negative value

Please help as this issue is driving me nuts... Tempdb has four data files and one log file. They are all located on the same dedicated drive. When I right click on tempdb in SQL Server Management ...
5
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1answer
3k views

Find transactions that are filling up the version store

we have enabled the "READ_COMMITTED_SNAPSHOT" for some of our SQL Server 2005 databases. Now from time to time we see that our TempDB is filling up the harddisk and we suspect the version store to be ...
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Splitting TempDB into multiples files equal to number of CPUs

The article SQL Server tempdb Best Practices Increase Performance suggests that I should split tempdb into a number of files equal to the number of cores. So for 4 cores you get 4 files. By ...
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556 views

Should a SQL Server TempDB space be allowed to be reclaimed?

If I don't have space concerns at the moment, should I size my TempDB as a large space initially and not let it's space be reclaimed? What's the best way determine what the optimal initial size for ...
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tempdb objects creator wanted, bufferpool issue caused by tempdb objects

I have a number of tables in tempdb named like #A0030B77 #A01D908C #A06D1FCB #A0F72FB0 #A1614404 #A1EB53E9 #A205D8FE #A255683D How (if) can I get spid of the process which created them? These ...
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481 views

Size of TempDB Microsoft SQL Server 2005

Are there drawbacks to having a large tempdb in a SQL Server database? Assuming the disk is not full. I am creating large temporary tables in a couple of queries. Once I am finished running queries, ...
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2answers
164 views

SQL 2008 RTM Temp Tables

Today I implemented a monitoring solution on our SQL server using Cacti and the first thing i noticed is the growth in the number of temporary tables, in just 3 hours on our test system we had an ...
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1answer
375 views

Is it normal for tempdb TPS to be higher than all other databases combined?

I'm investigating some performance issues on a production DB here, and I've noticed a slightly odd thing that I'm not sure is weird or not. If I run a quick Performance Monitor trace for the ...
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3answers
417 views

tempdb usage in SQL Server

I have a SELECT INTO statement writing to a database which is in SIMPLE recovery mode, and is not tempdb. Will this use tempdb at all? The SQL is something like USE TGTDB GO SELECT * INTO ...
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1answer
4k views

SQL Server TempDB behaviour in large memory environment

Reading over this question reminded me of a question I had a while ago. We have a SQL Server that has 512GB of RAM, the main database is 450 GB. We see quite a lot of action in TempDB (ok, I think ...
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3answers
563 views

Creating new TempDB files

I would like advice on what would be the best setup for our SQL Server 2005 TempDB. At the moment our Temp DB consists of a single MDF file of 3 GB and a single log file of 120 MB on the D: drive of ...
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3answers
9k views

System disk run out of space when running heavy SQL queries on SQL Server 2012

I'm quite new to SQL Server 2012, I would be grateful if someone can help. I have restored a copy of a huge database to SQL Server 2012 and I tried to run some simple queries against it. I'm trying ...
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Tempdb autogrowth settings

Following on from a recent question that I asked on Tempdb. I was wondering how to correctly set the autogrowth property when adding and moving the tempdb files? I ask because I would like to let SQL ...
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2answers
15k views

Safely moving and creating new tempdb files

Two things I'd like to know, how do you safely move tempdb with minimal downtime? Also, how do you create new tempdb files? Is it 1 per core? So quad-core = 4 tempdb files, creating three new ones?
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How to identify which query is filling up the tempdb transaction log?

I would like to know how to identify the exact query or stored proc which is actually filling up the transactional log of TEMPDB database.
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823 errors on tempdb

Have a couple Fiber channel SAN-attached cluster servers which have been intermittently reporting errors like: 2012-05-09 16:31:54.13 spid74 Error: 823, Severity: 24, State: 2. 2012-05-09 ...