» Increase network performance.
If you increase the number of buffers that the redirector reservers for network
performance, it may increase your network throughput. Each extra execution
thread that you configure will take 1k of additional nonpaged pool memory, but
only if your applications actually use them. To configure additional buffers
and threads, edit:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanWorkstation\Parameters
Modify or Add Value of type REG_DWORD for:
MaxCmds The range is 0 - 255 and the default is 15
MaxThreads Set it to the same value as MaxCmds
You may also want to increase the value of MaxCollectionCount. This REG_DWORD
is the buffer for character-mode named pipes writes. The default is 16 and the
range is 0 - 65535.
http://www.jsiinc.com/rh0125.htm
» Speed up file system activity.
If you have some extra RAM and an active file system, you can speed up
file system activity by increasing the IoPageLockLimit from the default
512K bytes to 4096K bytes or more. Edit:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Memory
Management
IoPageLockLimit type REG_DWORD Default: 512K
This entry is the maximum number of bytes that can be locked for I/O
operations. When the value is 0, the system defaults to 512K. The
largest value is based on the amount of memory in your system. I would
limit this entry to:
RAM (MB) IoPageLockLimit
Decimal
32 4096
64 8192
128 16384
256+ 65536
Before making changes, get a baseline by using performance monitor for
a representative period of time. Make your changes in small increments
and measure performance after each change.
http://www.jsiinc.com/rh0155.htm
» Performance tweaks for Windows NT 4.0.
It is possible that your Windows NT HAL (Hardware Abstraction Layer)
does not recognize the amount of L2 cache (Secondary RAM Cache) that
you have installed. To force Windows NT to recognize it, edit:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Session Manager\Memory
Management
The value name SecondLevelDataCache is a type REG_DWORD. A data value
of 0 is the default which sets the L2 cache to 256K. If you have a
different amount installed, set the value in decimal.
Example: If you have 512K cache, set the entry to 512 in decimal
(Hexadecimal 200).
If you have lots on memory, set DisablePagingExecutive, a type
REG_DWORD, to 1. This will allow drivers and the kernel code to
be kept in memory. The default is 0 which pages drivers and kernel
code when needed.
http://www.jsiinc.com/rh0301.htm
» Reduce network delay.
When TCP/IP network activity is light, delays may be encountered
with the default request buffer size (4356 decimal).
The range of this parameter is 512 - 65536 bytes. Testing has
shown that, in most standard Ethernet environments, 14596 (decimal)
is a better choice, if the memory is available. Edit:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\LanmanServer\Parameters
and Add Value name SizReqBuf as a type REG_DWORD.
Restart the computer.
http://www.jsiinc.com/rh0405.htm
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