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Cross-Database Blocking Problems


Cross-Database Blocking Problems

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jflzc
jflzc
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Hello,
Hope someone can help me with this problem.
I have two databases db1 and db2

Both have high concurrency at all times during the day, at certain point I start getting complaints about the speed of transactions, when I check the process monitor I get a lot of CXPACKET, LATCH_EX, PAGEIOLATCH on diferent transactions, the problem is the transaction blocking a process running on dba2 it's running on db1.

Tried adjusting the paralelism degree but it didnt solve it...

Am I having I/O bottlenecks?? How can I find out if the problem is the CPU, RAM, hard disk or network???

Sorry for any gramatical errors, English it's not my native languaje.

Please Help me...
muthukkumaran Kaliyamoorthy
muthukkumaran Kaliyamoorthy
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Group: General Forum Members
Points: 1225 Visits: 4840
jflzc (12/9/2009)
Hello,
Hope someone can help me with this problem.
I have two databases db1 and db2

Both have high concurrency at all times during the day, at certain point I start getting complaints about the speed of transactions, when I check the process monitor I get a lot of CXPACKET, LATCH_EX, PAGEIOLATCH on diferent transactions, the problem is the transaction blocking a process running on dba2 it's running on db1.

Tried adjusting the paralelism degree but it didnt solve it...

Am I having I/O bottlenecks?? How can I find out if the problem is the CPU, RAM, hard disk or network???

Sorry for any gramatical errors, English it's not my native languaje.
Please Help me...


Hi,
First find the "transaction blocking a process running on dba2" using sysprocesses.

Also run server side trace
Read the Gail Articles :Finding the Causes of Poor Performance
http://www.simple-talk.com/content/print.aspx?article=666

>Check the perfmon counters

Muthukkumaran Kaliyamoorthy

Helping SQL DBAs and Developers >>>SqlserverBlogForum

Roshan Jospeh
Roshan Jospeh
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Points: 1054 Visits: 1994
Also CPACKET denotes parallelism waits. You might want to expiriment with MAXDOP settings

---------------------------------------------------------------------------------------------------------------------------------------------------- Roshan JoeJeff Moden -Forum Etiquette: How to post data/code on a forum to get the best help
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