SQL Clone
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Slows system performance


Slows system performance

Author
Message
ChrisM@Work
ChrisM@Work
SSCoach
SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)

Group: General Forum Members
Points: 16324 Visits: 19552
DevDB (4/12/2013)
Use Batch insert/update/ delete instead of doing it in one big batch.


The OP is batching.

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
Neeraj Dwivedi
Neeraj Dwivedi
Ten Centuries
Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)Ten Centuries (1.1K reputation)

Group: General Forum Members
Points: 1101 Visits: 1336
My mistake. Missed that part.
Krishna1
Krishna1
Old Hand
Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)

Group: General Forum Members
Points: 350 Visits: 556
After addind checkpoint also its increading the log file size
ChrisM@Work
ChrisM@Work
SSCoach
SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)

Group: General Forum Members
Points: 16324 Visits: 19552
Krishna1 (4/15/2013)
After addind checkpoint also its increading the log file size


Even with batching, simple recovery mode and checkpointing, there will be a minimum log space requirement for each batch. If your log size is less than this, then you should expect the file to grow. Have you checked the size and usage of the log file? Here's the simplest way:
DBCC SQLPERF ( LOGSPACE )

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
Krishna1
Krishna1
Old Hand
Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)

Group: General Forum Members
Points: 350 Visits: 556
the script given gives me the size of the log file and used space. I would line to know why delete operation should increase the log file?
ChrisM@Work
ChrisM@Work
SSCoach
SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)

Group: General Forum Members
Points: 16324 Visits: 19552
Krishna1 (4/15/2013)
the script given gives me the size of the log file and used space. I would line to know why delete operation should increase the log file?


Deletes are fully logged. If something occurs which prevents the transaction from completing then the whole transaction would be rolled back using information from the tran log.

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
Krishna1
Krishna1
Old Hand
Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)

Group: General Forum Members
Points: 350 Visits: 556
even if i am using simple recovery model it will log it and increase the .ldf file size?
ChrisM@Work
ChrisM@Work
SSCoach
SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)

Group: General Forum Members
Points: 16324 Visits: 19552
If the log file has insufficient free space to handle the logging data from a batch of deletes, then yes the file will grow. Are you manually changing the size of the log file at any point?

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
Krishna1
Krishna1
Old Hand
Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)Old Hand (350 reputation)

Group: General Forum Members
Points: 350 Visits: 556
No am not manualy chaging. I have set log file size groth as 500MB and i am deleting almost 3 million rows. I has
i have just deleted 1.5 milion rows as it as grown by 500*11 times.

I have 5 indexes on this tables. Is this a cuse of log file size increase?
ChrisM@Work
ChrisM@Work
SSCoach
SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)SSCoach (16K reputation)

Group: General Forum Members
Points: 16324 Visits: 19552
How big is the data file (and any indexes)?

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search