Higher CPU when using isapi rewrite

ISAPI_Rewrite is Apache mod_rewrite compatible URL rewriter for Microsoft IIS
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Joined: 08 Mar 2017, 18:43

Higher CPU when using isapi rewrite

08 Mar 2017, 18:46

We noticed a significant increase in CPU usage the on our webservers around the time of the switch over to the new site. The servers were running around 7% CPU and have increased to 22-23%. Initially we thought it was a code issue, but after some digging and testing that we conducted on Wednesday, we determined the issue to be a problem with Helicon's ISAPI filter.

The reason we upgraded to the full version was to use a feature that would allow us to have per site configuration files rather than one large config file for all sites hosted on the machine. It seems that the use of the per config site files is what is increasing the CPU usage.

Can Helicon help to find a solution to the problem? If you need the configuration files, I have these on my webservers:
e:\deployedapps\media-web-horoscopo\currentprod\SiteSP\root\.htaccess
e:\deployedapps\media-web-astrologydotcom\currentprod\.htaccess
e:\deployedapps\media-web-horoscopedotcom\currentprod\.htaccess
c:\Program Files\Helicon\ISAPI_Rewrite3\httpd.conf

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Joined: 17 May 2017, 03:34

Re: Higher CPU when using isapi rewrite

17 May 2017, 04:10

Thanks a lot for sharing those configuration files with us.
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Joined: 10 Jul 2017, 07:41

Re: Higher CPU when using isapi rewrite

10 Jul 2017, 08:07

Actually, I don't know quality analog to CPU. I think that you'd better contact assignment masters and they'll give you professional help.

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Joined: 18 Aug 2017, 08:00

Re: Higher CPU when using isapi rewrite

18 Aug 2017, 08:04

The servers were running around 7% CPU and have increased to 22-23%. Initially we thought it was a code issue, but after some digging and testing that we conducted on Wednesday, stats help uk we determined the issue to be a problem with Helicon's ISAPI filter

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