JSI Tip 0392 - Shared IIS registry entries.

Registry entries shared by:

MSFTPSVC	FTP Service
GOPHERSVC	Gopher service
W3SVC	WWW service

are located at:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\InetInfo\Parameters

Value	Default	D e s c r i p t i o n
AcceptExOutstanding	40	The minimum number of idle sockets maintained when using AcceptEx, an IIS optimizing feature that allows IIS to establish a new connection and read its initial data request in the same step. The range is 0-1000.
AcceptExTimeout	0x78 (120 seconds)	The length of time an AcceptEx socket waits for operation completion. Limiting the time improves overall performance and reduces memory usage.
BandwidthLevel	0xFFFFFFFF	Limiting bandwidth prevents IIS from using a disproportionate share of the network when it sends data. The default does not limit bandwidth. If the bandwidth approaches the limit you set, it is throttled back.
CacheSecurityDescriptor	0	0=IIS retrieves each object to check user rights. 1=IIS caches objects so they don't have to be re-retrieved.
DisableMemoryCache	0	0=IIS caches objects to improve performance. 1=IIS is slow.
ListenBackLog	15	If the server is rejecting requests when it is most active, increase this value. The max is 250.
LogFileBatchSize	0x40 (64KB)	Signals when to write a logfile record. Larger values improve performance at the expense of memory.
LogFileFlushInterval	0x12C (300 Seconds)	A value of 0xFFFFFFFF never forces the log. It waits for the batch size. Lower values are designed for less active servers.
MaxPoolThreads	0xA (10)	20 threads are maximum.
MemoryCacheSize	10% of memory	A value of 0 disables the cache (bad idea) while any other value in bytes is valid.
MinFileKbSec	1000	The greater of ConnectionTimeout or File size divided by this value, calibrated in seconds, is the maximum time that IIS will allow to send a file. The largest number you can use is 8192.
ObjectCacheTTL	0x1E 30 seconds	0=IIS does not cache. 0x1-0x7FFFFFFF is the maximum time an inactive object can remain in cache. 0xFFFFFFFF=An object remains in cache until it is overwritten.
PoolThreadLimit	MB of RAM*2	This value is optimal for most systems and changing it might impair performance.
ThreadTimeout	0x 15180 86,400 sec.	Inactive I/O threads that exceed this limit are stopped.
UseAcceptEx	1	0=AcceptEx is disabled.1=AcceptEx is enabled.
UserTokenTTL	0x384 900 seconds	0=security tokens are not cached. This value determines how long an unreferenced security token remains in the cache.

You must reboot the server for any changes to take effect.