IE reducing number of windows processes when tab closed

In IE version 8/9 (possibly 7 also) when you create a new tab a new Windows process is created.

When you close the tab the process remains. I'm assuming that IE is reserving the memory as it will be able to use it again next time I open a tab.

I need to find a way to close this process when a tab is closed.

I have an application which uses too muc开发者_如何学运维h memory per tab. It's fine until users have opened and closed many tabs. IE is pretty much sat hogging 300-500Mb of memory with only a couple of tabs open.

This is phase 1 of solving the issue, I'm also going to dig in and reduce the amount of memory the application uses but does anyone know if there is a low level config change which will stop IE from reserving memory? Possibly a reg edit?

Thanks, Mike

Those processes live for a preset number of seconds before going away, in case you happen to open a new tab right after closing the old one (a common user scenario). That way IE avoids paying the process-startup tax.

However, you can control the amount of time it waits to shutdown processes using this registry key:

[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]
"TabShutdownDelay"=dword:00000000

For more info, see this.