HcCompressionBufferSize

The HcCompressionBufferSize property specifies the size of the compression buffer (in bytes) that IIS uses for receiving compressed data. This buffer is used for on-demand compression of static content, as well as dynamic content compression. A larger buffer yields slightly faster compression performance, but at the cost of using additional memory.

The size limit specified by HcCompressionBufferSize is used by IIS, only if either HcDoOnDemandCompression or HcDoDynamicCompression are set to true. The maximum allowable size of the compression buffer is 1,048,576 bytes (1 MB).

The World Wide Web Publishing Service (WWW service) must be restarted before changes to this property take effect.

Schema Attributes

Attribute Name	Value
ADSI/WMI Data Type	DWORD
ABO Data Type	DWORD_METADATA
Schema Default	8192
Internal Default	8192
Upper Bound	0
Lower Bound	Not specified
Internal ID	2223
Friendly ID	MD_HC_COMPRESSION_BUFFER_SIZE
Property Attributes	NO_ATTRIBUTES
User Type	IIS_MD_UT_SERVER

Configurable Locations

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

Metabase Path	IIS Admin Object Type
/LM/W3SVC/Filters/Compression/Parameters	IIsCompressionSchemes

Flags

There are no flags for this property.

Requirements

Client: Requires Windows XP Professional, Windows 2000 Professional, or Windows NT Workstation 4.0.

Server: Requires Windows Server 2003, Windows 2000 Server, or Windows NT Server 4.0.

Product: IIS

See Also