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IIS Configuration Optimization

Note:

When moving from Zend Core to Zend Server on IIS Microsoft's FastCGI is used instead of the Zend's FastCGI therfore the settings and configurations are in a different location. For more information per IIS version see below.

Tuning FastCGI Configuration for IIS6

Notes:

These default settings are defined when you install Zend Server.
- Before editing default values, backup the specified file for easy revert in case PHP functionality fails.
- Edit the specified configuration file using a simple text editor. Rich editors may break the formatting and render a non-operational server.

By default, Zend Server runs with a maximum of ten concurrent PHP instances. For high load Web servers, it is recommended to increase this value, based on your performance requirements and other hardware/software limitations (such as memory, CPU, etc.).

Instructions on how to complete a procedure

To control the maximum amount of concurrent PHP instances:

Go to C:\WINDOWS\system32\inetsrv\fcgiext.ini.
Locate the entry for "php" under Types.
Locate the section corresponding to this entry (usually under "[PHP]").
Append the following line at the end of this section:
MaxInstances=10

This will enable Zend Server to run ten PHP instances, for high loads. If you have lots of memory and high loads, increase this value.

Instructions on how to complete a procedure

To control the amount of requests handled by a single PHP instance before recycling:

Go to C:\WINDOWS\system32\inetsrv\fcgiext.ini.
Locate the entry for "php" under Types.
Locate the section corresponding to this entry (usually under "[PHP]").
Append the following line at the end of this section:
InstanceMaxRequests=10000

This will allow a single PHP instance to handle 10,000 requests, instead of the default 1,000.

If you set this number higher, make sure you increase the value of PHP_FCGI_MAX_REQUESTS located in the same file accordingly.

Tuning FastCGI Configuration for IIS7

Note:

These performance enhancements are defined by default when installing Zend Server .
- Before editing default values, backup the specified file for easy revert in case PHP functionality fails.
- Edit the specified configuration file using a simple text editor. Rich editors may break the formatting and render a non-operational server.

Requirements: IIS7 Resource Kit -

(x86) http://www.iis.net/downloads/default.aspx?tabid=34&i=1682&g=6

(x64) http://www.iis.net/downloads/default.aspx?tabid=34&i=1683&g=6

Once installed, you can administer your FastCGi settings from the Internet Information Services (IIS) Manager.

From here, you can configure your MaxInstances and InstanceMaxRequests.

Instructions on how to complete a procedure

To tune FastCGi configuration for IIS7:

Go to Start | All Programs | Administrative Tools | Internet Information Services 7 - Application Server Manager.
Select the server to manage from the left tree.
Click and select <install_dir>\bin\php-cgi.exe.
In the Actions section (on the right), click "Add Application..."
The Add FastCGI Application dialog opens:

Add FastCGI Application Dialog .

Tweak the variables as necessary.
The recommended Zend default is MaxInstances=10 and InstanceMaxRequests=10000.

Depending on which settings you change, the Web server's memory and CPU consumption are adjusted.