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SQL Procedure Performance in different networks Expand / Collapse
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Posted Monday, August 20, 2012 11:32 PM
Grasshopper

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Hi,

In my project there are two servers local and central. My central server is in Network1 and local server are in any network(like Network1,Network2 etc). I wrote a procedure to delete and insert data from local to central but it is taking 45 mins from network2 to network1. If local and central are in same network(network1) then it is taking 3 mins. We are using linked server to connect two servers. Please suggest me how to improve performance in cross network. How to check what is creating the problem?

Thanks in advance.

Regards,
Rahul
Post #1347572
Posted Tuesday, August 21, 2012 7:39 AM


SSChampion

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rahul_yerramareddy (8/20/2012)
Hi,

In my project there are two servers local and central. My central server is in Network1 and local server are in any network(like Network1,Network2 etc). I wrote a procedure to delete and insert data from local to central but it is taking 45 mins from network2 to network1. If local and central are in same network(network1) then it is taking 3 mins. We are using linked server to connect two servers. Please suggest me how to improve performance in cross network. How to check what is creating the problem?

Thanks in advance.

Regards,
Rahul


Pretty sparse on details but I would start by looking at the delete logic. You said it takes 3 minutes to delete? How much data are you deleting? 3 minutes seems like an awfully slow delete unless we are talking about millions and millions of rows.


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Post #1347788
Posted Wednesday, August 22, 2012 2:47 AM
Grasshopper

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Hi,

Please find below detailed explanation.

We have two domaind DOM1 and DOM2. Our Central server is in DOM1.Users have local servers either in dom1 or dom2.

If users from DOM1 server check in projects to central server (Inserting data into 90 tables(total 1 lakh rows) it took 3 minutes because local and central are in DOM1.

If users from DOM2 server check in projects to central server (Inserting data into 90 tables(total 1 lakh rows) it took 45 minutes because local server is in DOM2 and central is in DOM1.

In both cases we created linked server in local machines for central server to access central server tables for insertion.

Please suggest what is the reason for this time difference(42 mins) and how to prove this to user if this is due to network setup?

Thanks in advance.

Regards,
Rahul
Post #1348253
Posted Wednesday, August 22, 2012 7:29 AM


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rahul_yerramareddy (8/22/2012)
Hi,

Please find below detailed explanation.

We have two domaind DOM1 and DOM2. Our Central server is in DOM1.Users have local servers either in dom1 or dom2.

If users from DOM1 server check in projects to central server (Inserting data into 90 tables(total 1 lakh rows) it took 3 minutes because local and central are in DOM1.

If users from DOM2 server check in projects to central server (Inserting data into 90 tables(total 1 lakh rows) it took 45 minutes because local server is in DOM2 and central is in DOM1.

In both cases we created linked server in local machines for central server to access central server tables for insertion.

Please suggest what is the reason for this time difference(42 mins) and how to prove this to user if this is due to network setup?

Thanks in advance.

Regards,
Rahul


3 minutes to insert 3 lakh (or 300,000) rows seems like a long time to me. Not horrible but enough to raise some questions. How are you doing the insert? Cursor? Loop? I have seen cursor and loops performance go completely ridiculous when doing inserts/deletes through a link server.


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Need help? Help us help you.

Read the article at http://www.sqlservercentral.com/articles/Best+Practices/61537/ for best practices on asking questions.

Need to split a string? Try Jeff Moden's splitter.

Cross Tabs and Pivots, Part 1 – Converting Rows to Columns
Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs
Understanding and Using APPLY (Part 1)
Understanding and Using APPLY (Part 2)
Post #1348392
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