[This is preliminary documentation and subject to change]

### HcIoBufferSize

This metabase property specifies the size of the buffer, in bytes, that IIS will use to read uncompressed files. A larger buffer will yield slightly faster compression performance, but at the cost of additional memory usage.

HcIoBufferSize is used by IIS only if HcDoOnDemandCompression is set to TRUE. The maximum allowable value is 1,048,576 bytes (1 MB).

The Web service must be restarted before any changes to this property take effect.

Attribute Name | Attribute Value
Data Type | DWORD
Attributes | NO_ATTRIBUTES
Default Value | 8192
MetaFlagsEx | CACHE_PROPERTY_MODIFIED
User Type | IIS_MD_UT_SERVER
StartingNumber |
EndingNumber | 0
ID | 2222

### Access Locations

This property is accessible at the following locations:

Metabase Path | IIS Admin Object Type

### IIS Admin Base Object Information

The following table lists additional information required only for code that uses the IIS Admin Base Object.

Metabase identifier | MD_HC_IO_BUFFER_SIZE
Data type | DWORD
User type | IIS_MD_UT_SERVER

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