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• 10-14-2007, 5:27 PM

  CFGuru Joined on 10-14-2007, 9:23 PM Posts 1	FastCGI vs ISAPI IIS6? Reply Contact  I'm running an  Invision Power Board forum under PHP 5.4.2 in ISAPI mode on an W23K server.  I am having no problems whatsoever with ISAPI.  However, one can always use better performance.  My question is, will FastCGI improve performance at all in my configuration or would it actually make performance worse?   I do have eaccelerator installed.

• 10-15-2007, 2:23 AM

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  Red Fox UK Joined on 06-28-2005, 7:19 PM Posts 22	Re: FastCGI vs ISAPI IIS6? Reply Contact It wouldn't make performance worse, but would bring PHP stability to the table.

• 10-16-2007, 1:01 AM

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  ndamico Joined on 10-16-2007, 4:53 AM Posts 3	Re: FastCGI vs ISAPI IIS6? Reply Contact what do you mean by "php reliability"?  php has been very good for us.  is fastcgi faster?

• 10-16-2007, 11:50 AM

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  rickjames Joined on 10-31-2006, 2:43 PM Posts 193

  Re: FastCGI vs ISAPI IIS6? Reply Contact Hi ndamico, ISAPI is faster than FastCGI. FastCGI is faster than CGI (20x for /helloworld.php on Windows). CGI and FastCGI have the same reliability when running PHP. For many sites, running PHP as an ISAPI is unreliable (e.g. some extensions aren't thread safe). If you are experiencing excellent reliability with ISAPI then stick with it. (try "logparser "SELECT sc-status,COUNT(*) FROM u_ex071010.log GROUP BY sc-status" to get an idea of your current reliability, 500=bad, 200=good) Cheerz, Rick.

• 10-16-2007, 2:01 PM

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  ndamico Joined on 10-16-2007, 4:53 AM Posts 3

  Re: FastCGI vs ISAPI IIS6? Reply Contact Thank you Rick for the answer. that's what i've been trying to find. i've never had a problem with isapi, however i had read a thread on vbulletin.com talking about how fast fastcgi was which lead me to believe it would surpass isapi.  that's the answer i've been looking for. are you reasonably confident in that answer?  i'm only asking because i have zero experience with fastcgi.   thanks again   nick

• 10-16-2007, 2:05 PM

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  rickjames Joined on 10-31-2006, 2:43 PM Posts 193	Re: FastCGI vs ISAPI IIS6? Reply Contact Hi nick, I'm confident in the performance statements. You can verify them for yourself easily: 1) create /helloworld.php 2) aim wcat at it for 30 seconds 3) record request/sec repeat steps 2 and 3 for cgi, fastcgi and isapi Cheerz, Rick.

• 10-25-2007, 9:30 AM

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  brashquido Joined on 05-21-2006, 8:31 PM Australia Posts 338

  Re: FastCGI vs ISAPI IIS6? Reply Contact Hi Nick, You might be interested in an article I've just written on my site called performance tuning PHP 5.2 on IIS. As I've just posted in another thread on this forum, another consideration when performance tuning your site is your database server.   ---------------- Dominic Ryan Microsoft IIS MVP www.iis-aid.com My IIS articles My PHP articles My How-to guides

• 10-25-2007, 12:25 PM

  In reply to

  rickjames Joined on 10-31-2006, 2:43 PM Posts 193

  Re: FastCGI vs ISAPI IIS6? Reply Contact Life is full of surprises. I'm always claiming ISAPI > FastCGI > CGI. Which is true for helloworld.php and I'm guessing most pages that exceed 100 requests/sec. Someone showed me that their database-driven php application ran way faster as a FastCGI than an ISAPI. I've got no idea why this is. Which just goes to show: performance test your application if you're serious about performance, cause sometimes mysterious factors can change things a lot. (the other thing I learnt about db php app perf is: if you're not using persistent database connections, you can run out of ephemerel ports quickly, leading to database connections errors, leading to http 500s..)