ASP .NET Application is Hanging when number of user grows

Hi,

Asp.net 2.0 (VB) application with Sql server 2000 Installed in windows 2000 professional server.Only less than 10 users using this application.

The problem is sometimes the application didn't response, it's very slow to get the information and after sometimes its never responding it showing hourclass.

I used Helper class (Application Block). Since Sql Server 2000 doesn't have the MARS Function, i have manually close the connection and opening again everytime.

Any idea?. Thanks in advance.

Help Class Modified Code:

--

Code :

' If the provided connection is not open, we will open it

If connection.State <> ConnectionState.Open Then

connection.Open()

mustCloseConnection = True

Else

mustCloseConnection = False

End If

Data ObjectBase :

'The transaction will call this method and also check the connection status

Public Sub BeginTransaction()

Try

If Not (myTransaction Is Nothing) Then

'Throw New Exception(ConfigManager.ReadFromXml("msg_DataAccess_Begin_trans"))

Throw New Exception("Transaction Error in Begin")

End If

If ourConnection.State <> ConnectionState.Open Then

ourConnection.Open()

myMustClose = True

Else

myMustClose = False

End If

myTransaction = ourConnection.BeginTransaction()

Catch ex As Exception

'Throw New BRSDatabaseException(ex.Message, ex)

Throw ex

End Try ''''

End Sub

Sounds like you need to determine what the bottleneck is. It could any number of things from the network, memory, hardware.

Are there other databases on this server in use?

How many records are being returned from sql server?

Are the tables that are being hit indexed?

I'd have the sql server dba monitor usage on the server in question.

|||I don't think it is SQL Server or Asp.net Win2k Pro concurrent users is five which means you need Small Business Server.|||

Hi Anthony Martin,

Yes, In this server there are about 3 applications running.

Very few records only returning (100 records)

We set only the primary key index.

is there any problem with connection closing in the object base class?

|||

I can't really speak on whether or not the .NET code is the issue. I have more experience with database tuning.

What do the query plans look like for the queries the application is using?

Are there large table index scans?

Try running sp_who2 or select * from sys.dm_db_exec_requests to monitor system usage/performance

|||

This is the output for sp_who2 in Sql Server 2000 Database.

1 BACKGROUND sa . . NULL LAZY WRITER 21688 0 06/14 17:57:59 1
2 sleeping sa . . NULL LOG WRITER 200766 0 06/14 17:57:59 2
3 BACKGROUND sa . . NULL LOCK MONITOR 1203 0 06/14 17:57:59 3
4 BACKGROUND sa . . master SIGNAL HANDLER 47 0 06/14 17:57:59 4
5 BACKGROUND sa . . master TASK MANAGER 0 849 06/14 17:57:59 5
6 BACKGROUND sa . . master TASK MANAGER 0 0 06/14 17:57:59 6
7 sleeping sa . . NULL CHECKPOINT SLEEP 252156 17092 06/14 17:57:59 7
8 BACKGROUND sa . . master TASK MANAGER 0 0 06/14 17:57:59 8
9 BACKGROUND sa . . master TASK MANAGER 0 1595 06/14 17:57:59 9
10 BACKGROUND sa . . master TASK MANAGER 0 0 06/14 17:57:59 10
11 BACKGROUND sa . . master TASK MANAGER 0 0 06/14 17:57:59 11
12 BACKGROUND sa . . master TASK MANAGER 0 0 06/14 17:57:59 12
13 BACKGROUND sa . . master TASK MANAGER 0 388 06/14 17:57:59 13
14 BACKGROUND sa . . master TASK MANAGER 0 2129 06/14 17:57:59 14
15 BACKGROUND sa . . master TASK MANAGER 0 2176 06/14 17:57:59 15
17 BACKGROUND sa . . master TASK MANAGER 0 517 06/14 17:57:59 17
51 sleeping NT AUTHORITY\SYSTEM W2K92 . msdb AWAITING COMMAND 62 37 06/14 17:58:37 SQLAgent - Generic Refresher 51
52 sleeping NT AUTHORITY\SYSTEM W2K92 . msdb AWAITING COMMAND 1192429 29 09/13 12:57:53 SQLAgent - Alert Engine 52
53 sleeping WCAS PCOFFNONGGK8881 . WCASR2 AWAITING COMMAND 61 16 09/13 11:53:43 TESS 53
54 sleeping SA PCOFFNCHANWCS81 . TEMISCS AWAITING COMMAND 578 8 09/13 12:48:39 Temis-CS 54
55 sleeping SA PCOFFNHONGHSC81 . TEMISCS AWAITING COMMAND 218 3 09/13 12:07:14 Temis-CS 55
56 sleeping SA PCOFFNCHANWCS81 . TEMISCS AWAITING COMMAND 2080 228 09/13 12:49:45 Temis-CS 56
57 sleeping TESS W2K92 . TESS AWAITING COMMAND 29175 3 09/13 12:55:11 .Net SqlClient Data Provider 57
58 sleeping W2K92\w2k92_remote W2K92 . TESS AWAITING COMMAND 63 5 09/13 12:49:03 MS SQLEM 58
59 RUNNABLE W2K92\w2k92_remote W2K92 . TESS SELECT INTO 156 9 09/13 12:58:00 SQL Query Analyzer 59
60 sleeping TESS W2K92 . TESS AWAITING COMMAND 5549 0 09/13 12:58:02 .Net SqlClient Data Provider 60
61 sleeping sa W2K92 . WCASR2 AWAITING COMMAND 9422 408 09/13 12:57:57 Microsoft(R) Windows (R) 2000 Operating System 61
62 sleeping sa W2K92 . WCASR2 AWAITING COMMAND 1781 113 09/13 12:57:57 Microsoft(R) Windows (R) 2000 Operating System 62