This value determines the size of the hash table holding the state of TCP connections. The default value is 128 multiplied by the square of the number of processors in the system. When a large concurrent connection load is expected on the system, set the following registry entry to a high value to improve the performance of the hash table:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip
\Parameters\MaxHashTableSize (REG_DWORD)
The maximum value is 0x10000 (65,536). It is recommended that you consider using the maximum value for large servers which you expect to carry high connection load. Keep in mind that the table uses nonpaged pool, so do not set too high a value for the parameter if the server does not have much available nonpaged pool or if you do not anticipate a high-connection load.
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