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I got an error/busy loading site during high traffics in SharePoint IIS server. I tried restart the site, application pool,IIS, even sometime whole server restart.
But after restart SarePoint IIS hold the pending requests in worker processes which makes CPU/Memory maximum utilization and got an error/busy loading.
Why is this happening? Why is SharePoint IIS is not flushing the pending requests after restart.
Please help.
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Hi @Alice01 ,
Application pool will start a process named w3wp.exe when receive requests to the application. So restart application pool means stop and start WAS and W3SVC services. Then these services create processes. After these, CPU also need to assign resource to run sites. High CPU usage is a behavior when restart these. If you have too many sites and app pool, it may retrun error or busy loading. Please don't restart all app pools at same time. You can restart them by order.
Thank you for response. In my case there is only 1 web application and 1 pool. Why SharePoint IIS is not flushing the pending requests after restart. Need to down an hours, then it works. I just want to flush the pending request after restart.
Hi @Alice01 ,
I'm not sure what's the difference between share Point IIS and Server and IIS in Windows. You can try IIS in server or windows to see if there will be this problem. Maybe some configuration of share Point affected the restart.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(211.20000000000002, 61%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBS%3C/text%3E%3C/svg%3E)
IIS tries to be graceful on a restart. It creates a new app domain, and sends new requests to the new domain, and allow the old domain to process the pending requests before shutting it down.
if you want to kill the pending requests, stop the app pool, then restart.
Hello Bruce,
Thanks for response but it doesn't work in SharePoint IIS. I don't know why. All the pending request shows after restart ( site restart, pool restart , IIS restart).