Re: Session_End and SqlServer Session Mode

From: Karahan Celikel (NOkarahan_celikelSPAM_at_hotmail.com)
Date: 02/16/04 

Date: Mon, 16 Feb 2004 10:23:07 -0600

Thanks Alvin and Yan-Hong for your replies.

but isn't it weird that session_start is fired but not session_end?

"Yan-Hong Huang[MSFT]" <yhhuang@online.microsoft.com> wrote in message
news:QtNsZaG9DHA.2100@cpmsftngxa07.phx.gbl...
> Hello Karahan,
>
> Thanks for posting in the group.
>
> I agree with Alvin that Session_End event is supported only in InProc
mode.
>
> Here is a quick summary of the major things you need to know about picking
> asp.net session state mode:
>
> Storage location
> ----------------
> InProc - session kept as live objects in web server (aspnet_wp.exe)
>
> StateServer - session serialized and stored in memory in a separate
process
> (aspnet_state.exe). State Server can run on another machine
>
> SQLServer - session serialized and stored in SQL server
>
> Performance
> ------------
> InProc - Fastest, but the more session data, the more memory is consumed
on
> the web server, and that can affect performance.
>
> StateServer - When storing data of basic types (e.g. string, integer,
etc),
> in one test environment it's 15% slower than InProc. However, the cost of
> serialization/deserialization can affect performance if you're storing
lots
> of objects. Have to do performance testing for your own scenario.
>
> SQLServer - When storing data of basic types (e.g. string, integer, etc),
> in one test environment it's 25% slower than InProc. Same warning about
> serialization as in StateServer.
>
>
> Robustness
> -----------
> InProc - Session state will be lost if the worker process (aspnet_wp.exe)
> recycles, or if the appdomain restarts. It's because session state is
> stored in the memory space of an appdomain. Read doc on when such events
> will happen.
>
> StateServer - Solve the session state loss problem in InProc mode. Allows
> a webfarm to store session on a central server. Single point of failure
at
> the State Server.
>
> SQLServer - Similar to StateServer. Moreover, session state data can
> survive a SQL server restart after you've followed instructions in KB
> 311029.
>
> Caveats
> --------
> InProc - It won't work in web garden mode, because in that mode multiple
> aspnet_wp.exe will be running on the same machine. Switch to StateServer
> or SQLServer when using web garden. Also Session_End event is supported
> only in InProc mode.
>
> StateServer - In a web farm, make sure you have the same <machineKey> in
> all your web servers. See KB 313091 on how to do it. Also, make sure
your
> objects are serializable. See KB 312112 for details.
>
> SQLServer - If you specify integrated security in the connection string
> (e.g. "trusted_connection=true", or "integrated security=sspi"), it won't
> work if you also turn on impersonation in asp.net. Unfortunately, this
bug
> isn't reported in KB yet. (There is a QFE fix for it.) Also, make sure
> your objects are serializable. See KB 312112 for details.
>
> Does that answer your question?
>
> Best regards,
> Yanhong Huang
> Microsoft Community Support
>
> Get Secure! ¨C www.microsoft.com/security
> This posting is provided "AS IS" with no warranties, and confers no
rights.
>

Relevant Pages

  • RE: Session_End and SqlServer Session Mode
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