Click here to monitor SSC
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Slow insert into a table


Slow insert into a table

Author
Message
sqlnaive
sqlnaive
Hall of Fame
Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)

Group: General Forum Members
Points: 3687 Visits: 2774
I'm facing an issue here. I have one procedure which inserts data in a table with the help of some joins in few tables. Now there are around 1000 records to be inserted as a result of execution of that procedure. But the problem is that it's inserting one recor at a time. I have updated the statistics of all the dependent tables. There is no index on the table where data getting inserted. What can be the issue ? It's taking almost an hour to insert 1000 records.
Lowell
Lowell
SSChampion
SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)

Group: General Forum Members
Points: 14967 Visits: 38985
one record at a time?!?!
can you show the code for the procedure? does it have a cursor? are there triggers ont he destination table? does the trigger have cursors?
lots of possible issues, but without details, we can't offer much more than general guidelines: no cursors, no loops, etc

Lowell

--
help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!

sqlnaive
sqlnaive
Hall of Fame
Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)Hall of Fame (3.7K reputation)

Group: General Forum Members
Points: 3687 Visits: 2774
Nope there are no cursors used. But I can see the execution plan for the table. And it shows almost 75% of the time taken for Insertion operation.
Attached is the print screen of execution plan. I had to hide the object's name.
Attachments
ExecutionPlan.jpg (24 views, 120.00 KB)
Lowell
Lowell
SSChampion
SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)SSChampion (14K reputation)

Group: General Forum Members
Points: 14967 Visits: 38985
don't get caught up staring at the percentages; they have to add up to 100, so just because something is 75% doesn't mean it's bad, it just means that's where work was performed compared to other steps.

i put more importance on things like the estimated number of rows inserted being 19213 and the estimated subtree cost being 87.8014 than anything else.

you said it inserts one at a time, but this looks set based.
can you obfuscate the insert statement and show it to us? the actual execution plan would tell us everything, if you can post that.

Lowell

--
help us help you! If you post a question, make sure you include a CREATE TABLE... statement and INSERT INTO... statement into that table to give the volunteers here representative data. with your description of the problem, we can provide a tested, verifiable solution to your question! asking the question the right way gets you a tested answer the fastest way possible!

sqlbuddy123
sqlbuddy123
Ten Centuries
Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)Ten Centuries (1.2K reputation)

Group: General Forum Members
Points: 1212 Visits: 2243
It's hard to tell without seeing the actual insert statement or the execution plan. Please post it if possible ..

--
SQLBuddy
EricEyster
EricEyster
SSC Veteran
SSC Veteran (296 reputation)SSC Veteran (296 reputation)SSC Veteran (296 reputation)SSC Veteran (296 reputation)SSC Veteran (296 reputation)SSC Veteran (296 reputation)SSC Veteran (296 reputation)SSC Veteran (296 reputation)

Group: General Forum Members
Points: 296 Visits: 520
Does the table have a trigger?
SillyDragon
SillyDragon
SSC Rookie
SSC Rookie (30 reputation)SSC Rookie (30 reputation)SSC Rookie (30 reputation)SSC Rookie (30 reputation)SSC Rookie (30 reputation)SSC Rookie (30 reputation)SSC Rookie (30 reputation)SSC Rookie (30 reputation)

Group: General Forum Members
Points: 30 Visits: 188
sqlnaive (2/11/2014)
I'm facing an issue here. I have one procedure which inserts data in a table with the help of some joins in few tables. Now there are around 1000 records to be inserted as a result of execution of that procedure. But the problem is that it's inserting one recor at a time. I have updated the statistics of all the dependent tables. There is no index on the table where data getting inserted. What can be the issue ? It's taking almost an hour to insert 1000 records.


Have you tried to use other account to execute the SQL?
Have you tried to load all related data into other database and run again, take a look what happens?

it might be caused by database configuration.
Jeff Moden
Jeff Moden
SSC-Forever
SSC-Forever (45K reputation)SSC-Forever (45K reputation)SSC-Forever (45K reputation)SSC-Forever (45K reputation)SSC-Forever (45K reputation)SSC-Forever (45K reputation)SSC-Forever (45K reputation)SSC-Forever (45K reputation)

Group: General Forum Members
Points: 45167 Visits: 39925
sqlnaive (2/11/2014)
I'm facing an issue here. I have one procedure which inserts data in a table with the help of some joins in few tables. Now there are around 1000 records to be inserted as a result of execution of that procedure. But the problem is that it's inserting one recor at a time. I have updated the statistics of all the dependent tables. There is no index on the table where data getting inserted. What can be the issue ? It's taking almost an hour to insert 1000 records.


Please see the second link under "Helpful Links" in my signature line below. That's the information that we'd need to help you solve this problem.

--Jeff Moden

RBAR is pronounced ree-bar and is a Modenism for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
Stop thinking about what you want to do to a row... think, instead, of what you want to do to a column.
Although they tell us that they want it real bad, our primary goal is to ensure that we dont actually give it to them that way.
Although change is inevitable, change for the better is not.
Just because you can do something in PowerShell, doesnt mean you should. Wink

Helpful Links:
How to post code problems
How to post performance problems
Forum FAQs
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