Re: [PHP4BETA] Failure under load on NT Server

The ISAPI PHP extension is *NOT* in production quality yet.  Consider it 
beta, and know that it contains bugs.  If you have 25 simultaneous 
connections - you shouldn't be using the ISAPI extension.  To be perfectly 
honest, it's quite a miracle you didn't notice instability in lower loads 
than that :)

Anyway, we are working on stabilizing the ISAPI module, but due to the 
relatively 'hostile' multithreaded environment, it'll probably take 
time.  A big step towards achieving this stability is the Virtual Directory 
system that Andi implemented, which will most probably be introduced (at 
least optionally) in PHP 4.0.1.  But then too, don't expect the ISAPI 
extension to be rock-solid quite yet.

To be on the safe side, you'd have to use the CGI binary (php.exe), which 
would be considerably slower.

Zeev

At 17:15 14/06/2000, matthew wrote:
>Hi,
>
>I am running PHP 4 (release) on an NT Server sp6 with IIS and SQL Server 7.0.
>
>I am using ODBC in order to connect to SQL Server.
>
>The system works well under light load, however under heavier loads (25 
>simultaneous connections) I get an error in the browser ('PHP has 
>experienced an access violation 87xxxx').
>
>I am running PHP as an ISAPI extension.
>
>Can anyone help as this is running on a live server and we are expecting a 
>heavy load shortly??
>
>PHP is running on the SQL Server machine along with IIS - do you think 
>that it would help to move the webserver and PHP to another machine?
>
>Thanks in anticipation - I have been lurking on the list for a while and I 
>know if anyone can help it is you guys.
>
>Cheers,
>
>Matt
>
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Zeev Suraski   <[email protected]>  http://www.zend.com/