CacheISAPI Metabase Property

Applies To: Windows Server 2003, Windows Server 2003 with SP1

The CacheISAPI property indicates whether ISAPI extensions are cached in memory after first use. If the value of this property is set to true, ISAPI extensions, once loaded, remain in the cache until the server is stopped. If the value is set to false, extensions are unloaded from memory after the ISAPI extension is no longer in use.

ISAPI extensions are cached or not cached based on the value of this property at the time they were loaded into memory for use. Thus, if this property is changed after an extension has been loaded and cached, the change will have no effect on that extension until the Web server is restarted.

Important

There are severe performance implications to setting the value of this property to false. Also, some extensions cannot work properly when this property is set to false.

Attribute Name	Attribute Value
XML Data Type	Boolean
WMI Data Type	Boolean
ADSI Data Type	Boolean
ABO Data Type	Boolean
ABO Metabase Identifier	MD_CACHE_EXTENSIONS
Attributes	INHERIT
Default Value	true
MetaFlagsEx	CACHE_PROPERTY_MODIFIED
User Type	IIS_MD_UT_FILE
ID	6034

Configurable Locations

You can configure this property at the following locations in the IIS metabase.

Metabase Path	IIS Admin Object Type
/LM/W3SVC/n/ROOT /LM/W3SVC/n/ROOT/virtual_directory_name	IIsWebVirtualDir
/LM/W3SVC/n	IIsWebServer
/LM/W3SVC	IIsWebService
/LM/W3SVC/n/ROOT/physical_directory_name /LM/W3SVC/n/virtual_directory_name/physical_directory_name	IIsWebDirectory

Code Example

For general code examples, see Code Examples to Configure Metabase Properties.