Hi
As my previous thread (as referred in below link) in this subject was closed and the issue is still existing, I am staring a new one.
https://forums.iis.net/t/1233522.aspx?Multiple+CGI+FastCGI+instances
So far we made our site to run with PHP 5.3 and so no issues. As we got alert from our hosting support that we are running a old PHP version, we changed again to PHP 5.6. So the same issue started again
As Jean Sun suggested, kindly suggest a value to set the Max Instances,
Thanks