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cshah1
Constraint Violating Yak Guru
347 Posts |
 Posted - 2010-03-15 : 20:52:19
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| Can someone clarify?@@MAX_CONNECTIONS returns 32767 that is the maximum number of user connection on an instance of SQL server. Does that mean if a client application (assuming heavily used) can only have 32767 connection? How about a website that can have 1,00, 000 usres at a time? Is there a limitation on number of concurrent users on SQL Server? |
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cshah1
Constraint Violating Yak Guru
347 Posts |
Posted - 2010-03-15 : 20:54:21
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| I know .net application has connection pooling and your application should open connection late and close it as soon as possible still 32767 is a small number?Just curious not expected someone on SQL server side to know Does IBM DB2 or ORALCE has some limitation on number of connection or concurrent users?In my opinion SQL server can **NOT** have limitation on number of concurrent users, but there is a maximum capacity documentation that says 32767 connection I know number of connections <> concurrent users still..? |
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Kristen
Test
22859 Posts |
Posted - 2010-03-16 : 11:26:40
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Website only opens the connection for the duration of rendering the page ... that's a smaller number than the number of concurrent users  |
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cshah1
Constraint Violating Yak Guru
347 Posts |
Posted - 2010-03-16 : 12:53:15
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quote:
Originally posted by Kristen
Website only opens the connection for the duration of rendering the page ... that's a smaller number than the number of concurrent users
That's a good logical answer. Here is the thinghttp://msdn.microsoft.com/en-us/library/ms143432.aspxsays max user connection are 32767and if you go your management studio, right click on your SQL instanceand under server connections it should be zero (unlimited)In my opinon SQL can not have any limitations on connections or users That would be bad in terms of scalibitliy In old days MSDE had such connection limitations and as we all know MSDE is a history Let me reiterate my questions?a) How many concurrent users can connect to SQL server? b) How many maximum number simultaneous connections are allowed on an instance of SQL Server?p.s.I do not expect an answer based on a simple web search |
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RobertKaucher
Posting Yak Master
169 Posts |
Posted - 2010-03-16 : 13:21:12
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| According to Euan Garden, an Architect on the Visual Studion team:"In theory MSDE supports the same number of connections as SQL Server – 32,767 HOWEVER, it’s almost certain the server would run out of memory (remember there is a memory limit) before allocating that many connections, and due to the governor they would not all be able to run at the same time. So how many can run? That’s much like asking how long a piece of string is, I have heard of badly behaved apps with one connection hitting the governor, I’ve also heard of 100 users connected. In reality it all depends on the app and how it uses the server, a good planning number for a well written app that gets in and out of the database quickly would be 10-15 connections, however mileage really does vary."So, yes. There is a connection limit. http://blogs.msdn.com/euanga/archive/2006/03/09/545576.aspxSorry, this is based on a simple web search. but I expect Euan to know what he is talking about. |
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tkizer
Almighty SQL Goddess
38200 Posts |
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thewebhosting
Starting Member
17 Posts |
Posted - 2010-03-21 : 00:53:34
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| Hi,You can limit the number of connections but by default there is no limit for connections. However, it depends on your server configuration.You can find the number of connections with SP_Who. and ID greater than 50 is a user. You might get more joy by creating a who's logged in table and just getting your apps to insert / update / delete a record when they start up. |
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GURUNADHA7111
Starting Member
2 Posts |
Posted - 2010-03-30 : 14:55:30
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| Very good conversations. good topic to discuss. i am also facing some performance issues. let us hope for the best suitable answer.DBAGuru,India |
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Maximum Concurrent Users on SQL Server