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    <p>My experience has been that the session is a good means of managing state when you use it appropriately. However, often times it's misused, causing the "never ever use the session" sentiment shared by many developers. </p> <p>I and many other developers have ran into major performance issues when we mistakenly used the session to store large amounts of data from a database, so as to "save a trip." This is bad. Storing 2000 user records per session will bring the web server to its knees when more than a couple of users use the application. Session should not be used as a database cache.</p> <p>Storing an integer, however, per session is perfectly acceptable. Small amounts of data representing how the current user is using your application (think shopping cart) is a good use of session state.</p> <p>To me, it's really all about managing state. If done correctly, then session can be one of many good ways to manage state. It should be decided <em>in the beginning</em> on how to manage state though. Most often times, we've run into trouble when someone decides to just "throw something in the session".</p> <p>I found <a href="http://msdn.microsoft.com/en-us/magazine/cc163730.aspx" rel="noreferrer">this</a> article to be really helpful when using out-of-process modes, and it contains some tips that I would have never thought of on my own. For example, rather than marking a class as serializable, storing its primitive datatype members in separate session variables, and then recreating the object can improve performance.</p>
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    1. POASP.NET Masters: What are the advantages / disadvantages of using Session variables?
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    1. USAaron Daniels
    1. USAaron Daniels
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    1. COi completely agree with you, session is definitely not meant to act as a large data persistence medium but to be used for small chunks of data.
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      1. USVikram
    2. COThat link you provided really helped--thanks!
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      1. USMicah
    3. COThe "state" of the session should represent all open windows a user may have, not just one. I think this should be a point to hit.
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      1. USJoe Phillips
 

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