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HomeHomeOur CommunityOur CommunityGeneral Discuss...General Discuss...App Pool RecyclingApp Pool Recycling
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2/11/2008 10:05 AM
 
gproudley

Joined: 1/31/2008
Posts: 3

I was curious if there was a gneeric list of what causes app pool recycles?  I know if would be different from site to site based on how your particular site is set up.  However, there must be some causes that are common across the board.  Can somebody list a few for me?
 
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2/11/2008 11:19 AM
 
duchoangle

www.6h15.com
Joined: 6/22/2005
Posts: 457

There're various reasons for the app pool to recycle, depending on how your app pool in IIS is set.

By default, after 20 minutes of inactivity, the app pool comes to "sleep" and when you access the site again, it recycles. That's the most common reason. To overcome this, use a Keep Alive Service (look at host-tracker.com)

Other settings might include recycling the app pool at a particular time (daily) - on shared hosting they often set to recycle the pool at about 1 am, when the site is least accessed; when resource consumption reaches a point or recycling after a particular request count is reached. There may be other reasons but these are the only ones in top of my head.

If you have access to IIS, right click your app pool, choose "Property" and you'll get what I mean. If you don't, talk to your hosting provider about it.

Hope this helps,

Duc
 
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2/11/2008 10:14 PM
 
ROB AX

Joined: 9/3/2004
Posts: 2185

http://technet2.microsoft.com/windowsserver/en/library/caab86eb-8cd5-4b51-b8a2-679f1c1e7b321033.mspx?mfr=true

http://support.microsoft.com/kb/332088

You can configure various recycling triggers... exactly what you do depends on how the application is running. You can't really do anything to change them on a shared host ebcause the host already tweaks them to suit their needs in keeping all the sites going.

The events you see in your DNN log about shutting down and restarting are generally triggered by the 20 minute idle timeout or other configuration changes to the site, for example when you update a module.

Rob
 
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