DBCC checkdb on tempdbLong running DBCC CHECKDBAlternative of DBCC CHECKDBDBCC CheckDB run into early...
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DBCC checkdb on tempdb
Long running DBCC CHECKDBAlternative of DBCC CHECKDBDBCC CheckDB run into early hardware failureDBCC CHECKDB ran out of memoryDBCC CHECKDB LastKnownGoodDBCC CHECKDB errorsDate of Last DBCC checkdb runDBCC CHECKDB errorDBCC CHECKDB grows tempdb to a huge size - Legacy MS SQL Server 2008 R2 InstanceCan a full DBCC CHECKDB operation be safely offloaded to a restored backup on a different server?
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Is it recommended to run DBCC CheckDB on tempdb? If yes, can someone please list out the reasons to do so? This could be on any SQL Server version. The one I have is SQL Server 2017.
sql-server dbcc-checkdb
add a comment |
Is it recommended to run DBCC CheckDB on tempdb? If yes, can someone please list out the reasons to do so? This could be on any SQL Server version. The one I have is SQL Server 2017.
sql-server dbcc-checkdb
add a comment |
Is it recommended to run DBCC CheckDB on tempdb? If yes, can someone please list out the reasons to do so? This could be on any SQL Server version. The one I have is SQL Server 2017.
sql-server dbcc-checkdb
Is it recommended to run DBCC CheckDB on tempdb? If yes, can someone please list out the reasons to do so? This could be on any SQL Server version. The one I have is SQL Server 2017.
sql-server dbcc-checkdb
sql-server dbcc-checkdb
asked 8 hours ago
SQLPRODDBASQLPRODDBA
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1,13511533
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3 Answers
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votes
No, it's not recommended because it's largely a waste of time. When SQL Server restarts, tempdb is created from scratch. Also, the data in there isn't around long enough to be a good indicator of if there's an issue with it, or the underlying storage.
Both Ola's scripts and Maintenance Plans will skip tempdb when you set up CHECKDB routines.
Another reason why it's largely useless is because if tempdb does get corrupted, you'll know in a hurry. Check out my blog post here where I corrupt tempdb on purpose: DBA Days: Killing TempDB softly
Coming up in SQL Server 2019, we'll be able to use "in memory" technology for system tables in tempdb. While this solves pretty big contention issues, you can't run CHECKDB against in-memory tables. The only way you could check those is if you backed up tempdb, which isn't something you can do.
BACKUP DATABASE tempdb TO DISK = 'D:Backupst.bak'
Msg 3147, Level 16, State 3, Line 27 Backup and restore operations are
not allowed on database tempdb. Msg 3013, Level 16, State 1, Line 27
BACKUP DATABASE is terminating abnormally.
If you really think it's worth running checkdb against a database that SQL Server won't allow you to back up, well, it's your maintenance window, I suppose.
I disagree you "should" run checkdb against tempdb, although it does not checks it completely but I would never miss it. Why, simply because it is a database no matter whether created from scratch.
– Shanky
8 hours ago
@Shanky Wouldn't you rather spend that time checking actual databases? Do your thing, though.
– Erik Darling
8 hours ago
let me rephrase you should run checkdb on all user and system databases, is that fine ?. I believe one has to play second fiddle to time when it comes to consistency.
– Shanky
8 hours ago
Even maintenance plan does not have option to select tempdb :-)
– Kin Shah
8 hours ago
@Shanky You can't even back tempdb up. SQL Server won't let you. But it's cool if you wanna spend your time on it.
– Erik Darling
8 hours ago
add a comment |
Complementing to Erik's answer
Running DBCC CHECKDB against tempdb does not perform any allocation or catalog checks and must acquire shared table locks to perform table checks. This is because, for performance reasons, database snapshots are not available on tempdb. This means that the required transactional consistency cannot be obtained.
The only reason that I can think of running a checkdb against tempdb is when tempdb gets badly corrupted that the sessions using it starts to get errors.
Also, when tempdb gets corrupted, it is possible that your user databases might have corruption as well.
I personally do not have checkdb done on tempdb.
add a comment |
I have a different perspective here, you "should" run checkdb against all the databases no matter system or user period.Why, simply because it is database which stores information what if there is corruption are you going to restart the SQl Server so that tempdb is cleared and "may be" corruption is gone. I would also like you to read Brent Ozar blog
Q: Should I run CheckDB against TempDB?
Yes– you should. CheckDB can’t do every single check against TempDB that it can against other databases (the output will let you know that it can’t create a snapshot), but it can still run a variety of checks against TempDB and it’s supported to run it. Don’t skip it! You should be checking master, model, msdb and tempdb, plus all your user databases.
Should I run checkdb on Tempdb as often i do for user database ? No you can avoid that if required.
Should I not run checkdb at all on tempdb database ? No, you should run. Do not omit it.
add a comment |
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3 Answers
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active
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3 Answers
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active
oldest
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votes
No, it's not recommended because it's largely a waste of time. When SQL Server restarts, tempdb is created from scratch. Also, the data in there isn't around long enough to be a good indicator of if there's an issue with it, or the underlying storage.
Both Ola's scripts and Maintenance Plans will skip tempdb when you set up CHECKDB routines.
Another reason why it's largely useless is because if tempdb does get corrupted, you'll know in a hurry. Check out my blog post here where I corrupt tempdb on purpose: DBA Days: Killing TempDB softly
Coming up in SQL Server 2019, we'll be able to use "in memory" technology for system tables in tempdb. While this solves pretty big contention issues, you can't run CHECKDB against in-memory tables. The only way you could check those is if you backed up tempdb, which isn't something you can do.
BACKUP DATABASE tempdb TO DISK = 'D:Backupst.bak'
Msg 3147, Level 16, State 3, Line 27 Backup and restore operations are
not allowed on database tempdb. Msg 3013, Level 16, State 1, Line 27
BACKUP DATABASE is terminating abnormally.
If you really think it's worth running checkdb against a database that SQL Server won't allow you to back up, well, it's your maintenance window, I suppose.
I disagree you "should" run checkdb against tempdb, although it does not checks it completely but I would never miss it. Why, simply because it is a database no matter whether created from scratch.
– Shanky
8 hours ago
@Shanky Wouldn't you rather spend that time checking actual databases? Do your thing, though.
– Erik Darling
8 hours ago
let me rephrase you should run checkdb on all user and system databases, is that fine ?. I believe one has to play second fiddle to time when it comes to consistency.
– Shanky
8 hours ago
Even maintenance plan does not have option to select tempdb :-)
– Kin Shah
8 hours ago
@Shanky You can't even back tempdb up. SQL Server won't let you. But it's cool if you wanna spend your time on it.
– Erik Darling
8 hours ago
add a comment |
No, it's not recommended because it's largely a waste of time. When SQL Server restarts, tempdb is created from scratch. Also, the data in there isn't around long enough to be a good indicator of if there's an issue with it, or the underlying storage.
Both Ola's scripts and Maintenance Plans will skip tempdb when you set up CHECKDB routines.
Another reason why it's largely useless is because if tempdb does get corrupted, you'll know in a hurry. Check out my blog post here where I corrupt tempdb on purpose: DBA Days: Killing TempDB softly
Coming up in SQL Server 2019, we'll be able to use "in memory" technology for system tables in tempdb. While this solves pretty big contention issues, you can't run CHECKDB against in-memory tables. The only way you could check those is if you backed up tempdb, which isn't something you can do.
BACKUP DATABASE tempdb TO DISK = 'D:Backupst.bak'
Msg 3147, Level 16, State 3, Line 27 Backup and restore operations are
not allowed on database tempdb. Msg 3013, Level 16, State 1, Line 27
BACKUP DATABASE is terminating abnormally.
If you really think it's worth running checkdb against a database that SQL Server won't allow you to back up, well, it's your maintenance window, I suppose.
I disagree you "should" run checkdb against tempdb, although it does not checks it completely but I would never miss it. Why, simply because it is a database no matter whether created from scratch.
– Shanky
8 hours ago
@Shanky Wouldn't you rather spend that time checking actual databases? Do your thing, though.
– Erik Darling
8 hours ago
let me rephrase you should run checkdb on all user and system databases, is that fine ?. I believe one has to play second fiddle to time when it comes to consistency.
– Shanky
8 hours ago
Even maintenance plan does not have option to select tempdb :-)
– Kin Shah
8 hours ago
@Shanky You can't even back tempdb up. SQL Server won't let you. But it's cool if you wanna spend your time on it.
– Erik Darling
8 hours ago
add a comment |
No, it's not recommended because it's largely a waste of time. When SQL Server restarts, tempdb is created from scratch. Also, the data in there isn't around long enough to be a good indicator of if there's an issue with it, or the underlying storage.
Both Ola's scripts and Maintenance Plans will skip tempdb when you set up CHECKDB routines.
Another reason why it's largely useless is because if tempdb does get corrupted, you'll know in a hurry. Check out my blog post here where I corrupt tempdb on purpose: DBA Days: Killing TempDB softly
Coming up in SQL Server 2019, we'll be able to use "in memory" technology for system tables in tempdb. While this solves pretty big contention issues, you can't run CHECKDB against in-memory tables. The only way you could check those is if you backed up tempdb, which isn't something you can do.
BACKUP DATABASE tempdb TO DISK = 'D:Backupst.bak'
Msg 3147, Level 16, State 3, Line 27 Backup and restore operations are
not allowed on database tempdb. Msg 3013, Level 16, State 1, Line 27
BACKUP DATABASE is terminating abnormally.
If you really think it's worth running checkdb against a database that SQL Server won't allow you to back up, well, it's your maintenance window, I suppose.
No, it's not recommended because it's largely a waste of time. When SQL Server restarts, tempdb is created from scratch. Also, the data in there isn't around long enough to be a good indicator of if there's an issue with it, or the underlying storage.
Both Ola's scripts and Maintenance Plans will skip tempdb when you set up CHECKDB routines.
Another reason why it's largely useless is because if tempdb does get corrupted, you'll know in a hurry. Check out my blog post here where I corrupt tempdb on purpose: DBA Days: Killing TempDB softly
Coming up in SQL Server 2019, we'll be able to use "in memory" technology for system tables in tempdb. While this solves pretty big contention issues, you can't run CHECKDB against in-memory tables. The only way you could check those is if you backed up tempdb, which isn't something you can do.
BACKUP DATABASE tempdb TO DISK = 'D:Backupst.bak'
Msg 3147, Level 16, State 3, Line 27 Backup and restore operations are
not allowed on database tempdb. Msg 3013, Level 16, State 1, Line 27
BACKUP DATABASE is terminating abnormally.
If you really think it's worth running checkdb against a database that SQL Server won't allow you to back up, well, it's your maintenance window, I suppose.
edited 8 hours ago
answered 8 hours ago
Erik DarlingErik Darling
24.4k1376125
24.4k1376125
I disagree you "should" run checkdb against tempdb, although it does not checks it completely but I would never miss it. Why, simply because it is a database no matter whether created from scratch.
– Shanky
8 hours ago
@Shanky Wouldn't you rather spend that time checking actual databases? Do your thing, though.
– Erik Darling
8 hours ago
let me rephrase you should run checkdb on all user and system databases, is that fine ?. I believe one has to play second fiddle to time when it comes to consistency.
– Shanky
8 hours ago
Even maintenance plan does not have option to select tempdb :-)
– Kin Shah
8 hours ago
@Shanky You can't even back tempdb up. SQL Server won't let you. But it's cool if you wanna spend your time on it.
– Erik Darling
8 hours ago
add a comment |
I disagree you "should" run checkdb against tempdb, although it does not checks it completely but I would never miss it. Why, simply because it is a database no matter whether created from scratch.
– Shanky
8 hours ago
@Shanky Wouldn't you rather spend that time checking actual databases? Do your thing, though.
– Erik Darling
8 hours ago
let me rephrase you should run checkdb on all user and system databases, is that fine ?. I believe one has to play second fiddle to time when it comes to consistency.
– Shanky
8 hours ago
Even maintenance plan does not have option to select tempdb :-)
– Kin Shah
8 hours ago
@Shanky You can't even back tempdb up. SQL Server won't let you. But it's cool if you wanna spend your time on it.
– Erik Darling
8 hours ago
I disagree you "should" run checkdb against tempdb, although it does not checks it completely but I would never miss it. Why, simply because it is a database no matter whether created from scratch.
– Shanky
8 hours ago
I disagree you "should" run checkdb against tempdb, although it does not checks it completely but I would never miss it. Why, simply because it is a database no matter whether created from scratch.
– Shanky
8 hours ago
@Shanky Wouldn't you rather spend that time checking actual databases? Do your thing, though.
– Erik Darling
8 hours ago
@Shanky Wouldn't you rather spend that time checking actual databases? Do your thing, though.
– Erik Darling
8 hours ago
let me rephrase you should run checkdb on all user and system databases, is that fine ?. I believe one has to play second fiddle to time when it comes to consistency.
– Shanky
8 hours ago
let me rephrase you should run checkdb on all user and system databases, is that fine ?. I believe one has to play second fiddle to time when it comes to consistency.
– Shanky
8 hours ago
Even maintenance plan does not have option to select tempdb :-)
– Kin Shah
8 hours ago
Even maintenance plan does not have option to select tempdb :-)
– Kin Shah
8 hours ago
@Shanky You can't even back tempdb up. SQL Server won't let you. But it's cool if you wanna spend your time on it.
– Erik Darling
8 hours ago
@Shanky You can't even back tempdb up. SQL Server won't let you. But it's cool if you wanna spend your time on it.
– Erik Darling
8 hours ago
add a comment |
Complementing to Erik's answer
Running DBCC CHECKDB against tempdb does not perform any allocation or catalog checks and must acquire shared table locks to perform table checks. This is because, for performance reasons, database snapshots are not available on tempdb. This means that the required transactional consistency cannot be obtained.
The only reason that I can think of running a checkdb against tempdb is when tempdb gets badly corrupted that the sessions using it starts to get errors.
Also, when tempdb gets corrupted, it is possible that your user databases might have corruption as well.
I personally do not have checkdb done on tempdb.
add a comment |
Complementing to Erik's answer
Running DBCC CHECKDB against tempdb does not perform any allocation or catalog checks and must acquire shared table locks to perform table checks. This is because, for performance reasons, database snapshots are not available on tempdb. This means that the required transactional consistency cannot be obtained.
The only reason that I can think of running a checkdb against tempdb is when tempdb gets badly corrupted that the sessions using it starts to get errors.
Also, when tempdb gets corrupted, it is possible that your user databases might have corruption as well.
I personally do not have checkdb done on tempdb.
add a comment |
Complementing to Erik's answer
Running DBCC CHECKDB against tempdb does not perform any allocation or catalog checks and must acquire shared table locks to perform table checks. This is because, for performance reasons, database snapshots are not available on tempdb. This means that the required transactional consistency cannot be obtained.
The only reason that I can think of running a checkdb against tempdb is when tempdb gets badly corrupted that the sessions using it starts to get errors.
Also, when tempdb gets corrupted, it is possible that your user databases might have corruption as well.
I personally do not have checkdb done on tempdb.
Complementing to Erik's answer
Running DBCC CHECKDB against tempdb does not perform any allocation or catalog checks and must acquire shared table locks to perform table checks. This is because, for performance reasons, database snapshots are not available on tempdb. This means that the required transactional consistency cannot be obtained.
The only reason that I can think of running a checkdb against tempdb is when tempdb gets badly corrupted that the sessions using it starts to get errors.
Also, when tempdb gets corrupted, it is possible that your user databases might have corruption as well.
I personally do not have checkdb done on tempdb.
edited 8 hours ago
Erik Darling
24.4k1376125
24.4k1376125
answered 8 hours ago
Kin ShahKin Shah
54.5k484197
54.5k484197
add a comment |
add a comment |
I have a different perspective here, you "should" run checkdb against all the databases no matter system or user period.Why, simply because it is database which stores information what if there is corruption are you going to restart the SQl Server so that tempdb is cleared and "may be" corruption is gone. I would also like you to read Brent Ozar blog
Q: Should I run CheckDB against TempDB?
Yes– you should. CheckDB can’t do every single check against TempDB that it can against other databases (the output will let you know that it can’t create a snapshot), but it can still run a variety of checks against TempDB and it’s supported to run it. Don’t skip it! You should be checking master, model, msdb and tempdb, plus all your user databases.
Should I run checkdb on Tempdb as often i do for user database ? No you can avoid that if required.
Should I not run checkdb at all on tempdb database ? No, you should run. Do not omit it.
add a comment |
I have a different perspective here, you "should" run checkdb against all the databases no matter system or user period.Why, simply because it is database which stores information what if there is corruption are you going to restart the SQl Server so that tempdb is cleared and "may be" corruption is gone. I would also like you to read Brent Ozar blog
Q: Should I run CheckDB against TempDB?
Yes– you should. CheckDB can’t do every single check against TempDB that it can against other databases (the output will let you know that it can’t create a snapshot), but it can still run a variety of checks against TempDB and it’s supported to run it. Don’t skip it! You should be checking master, model, msdb and tempdb, plus all your user databases.
Should I run checkdb on Tempdb as often i do for user database ? No you can avoid that if required.
Should I not run checkdb at all on tempdb database ? No, you should run. Do not omit it.
add a comment |
I have a different perspective here, you "should" run checkdb against all the databases no matter system or user period.Why, simply because it is database which stores information what if there is corruption are you going to restart the SQl Server so that tempdb is cleared and "may be" corruption is gone. I would also like you to read Brent Ozar blog
Q: Should I run CheckDB against TempDB?
Yes– you should. CheckDB can’t do every single check against TempDB that it can against other databases (the output will let you know that it can’t create a snapshot), but it can still run a variety of checks against TempDB and it’s supported to run it. Don’t skip it! You should be checking master, model, msdb and tempdb, plus all your user databases.
Should I run checkdb on Tempdb as often i do for user database ? No you can avoid that if required.
Should I not run checkdb at all on tempdb database ? No, you should run. Do not omit it.
I have a different perspective here, you "should" run checkdb against all the databases no matter system or user period.Why, simply because it is database which stores information what if there is corruption are you going to restart the SQl Server so that tempdb is cleared and "may be" corruption is gone. I would also like you to read Brent Ozar blog
Q: Should I run CheckDB against TempDB?
Yes– you should. CheckDB can’t do every single check against TempDB that it can against other databases (the output will let you know that it can’t create a snapshot), but it can still run a variety of checks against TempDB and it’s supported to run it. Don’t skip it! You should be checking master, model, msdb and tempdb, plus all your user databases.
Should I run checkdb on Tempdb as often i do for user database ? No you can avoid that if required.
Should I not run checkdb at all on tempdb database ? No, you should run. Do not omit it.
edited 8 hours ago
answered 8 hours ago
ShankyShanky
15.2k42346
15.2k42346
add a comment |
add a comment |
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