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Upstream SSL IIS Performance

August 19, 2012 07:55PM
Greetings,

I have an nginx server deployed infront of a Internet Information Services 6.0 server. The issue I have is that when requesting content from the IIS server via HTTPS I am seeing an considerable increase in reponse time from the upstream server. For example requesting the following javascript file I am seeing the following log entires (Using a custom log format to catch upsteam response times)

GET /client/javascript/libraries/query-string/2.1.7/query-min.js HTTP/1.1" 200 upstream 0.040 request 0.046 [for reversproxy via 172.25.50.203:80]

GET /client/javascript/libraries/query-string/2.1.7/query-min.js HTTP/1.1" 200 upstream 0.234 request 0.243 [for reverseproxy via 172.25.50.203:443]

As you can see it's taking up to an additional 200+ ms to serve up the js file to nginx when talking to the upsteam server via HTTPS. I understand that there is an overhead with HTTPS but I wouldn't expect it to be this great.

I also understand it would be better to serve the static content directly from nginx but at the moment this isn't an option.

I am currently running version 1.3.1 of nginx with the following configure arguments

--with-http_ssl_module --add-module=/root/simpl-ngx_devel_kit-bc97eea --add-module=/root/agentzh-headers-more-nginx-module-3580526 --add-module=/root/yaoweibin-ngx_http_substitutions_filter_module-f4080ae

I'm assuming all nginx ssl directives are for communication between the client and nginx, Do I have any options for improving the https response performance with the upsteam IIS server? Apart from talking to it via HTTP?

Thanks In Advance

Dan
Subject Author Posted

Upstream SSL IIS Performance

d2radio August 19, 2012 07:55PM

Re: Upstream SSL IIS Performance

d2radio August 19, 2012 07:59PM

Re: Upstream SSL IIS Performance

Francis Daly August 19, 2012 09:14PM

Re: Upstream SSL IIS Performance

d2radio August 19, 2012 11:06PM

Re: Upstream SSL IIS Performance

Maxim Dounin August 20, 2012 07:44AM

Re: Upstream SSL IIS Performance

d2radio August 20, 2012 11:14PM



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