This is a fact stated by Francois that confirms the need for our proposal of 
making ICS one-handle-per-thread.

Best Regards,

SubZero

----- Original Message ----- 
From: "Francois PIETTE" <[EMAIL PROTECTED]>
To: "ICS support mailing" <twsocket@elists.org>
Sent: Monday, December 26, 2005 1:21 PM
Subject: Re: [twsocket] About Windows TCP tuning for hudge ICS projects


> There is also another issue related to the number of window handles. By
> default W2K and up limit the number of window handle to 10000. As TWSocket
> use a hidden window per socket, if you don't change that limit, you will 
> not
> have more than 10000 simultaneous sockets (and even less since the process
> will use window handles for many other things). I haven't the MSDN 
> reference
> at hand, you should find it more or less easily. There is a registry key 
> to
> change to allow more than 10000 handles.
>
> --
> [EMAIL PROTECTED]
> http://www.overbyte.be
>
>
> ----- Original Message ----- 
> From: "Dod" <[EMAIL PROTECTED]>
> To: "ICS support mailing" <twsocket@elists.org>
> Sent: Monday, December 26, 2005 11:16 AM
> Subject: [twsocket] About Windows TCP tuning for hudge ICS projects
>
>
>> Hello,
>>
>> I  have to tune my ICS based server to handle 16.000 TCP permanent cnx
>> (but  very  low  transfert  rate with less than 4KB blocks of datas to
>> transfert to each client).
>>
>> After   taking   attention   to   all  guys  here  talking  about  TCP
>> optimization,  I have made a small resume of all what I grabbed around
>> please  correct  me if I am wrong or add any information that could be
>> usefull  for anybody asking for such information time to time, but may
>> be this kind of FAQ already exists ?
>>
>> ******************
>> ICS informations
>> ******************
>>
>> - Actually each socket uses one handle.
>>
>> -  Multithreading  to  handle the sockets themselves is not necessary,
>> but could be to start some database query.
>>
>> -  If  you  use  forms in your application, take care that if you have
>> hudge  activity  your  GUI interface may be slow or none responsive at
>> all.  It  could  be better to manage ICS in a new thread that will not
>> slow down your GUI.
>>
>> -  If you want to refresh GUI according to socket activity, do it thru
>> a  simple  timer  every second for example -> your socket thread could
>> store informations in some TList that your timed procedure will access
>> using thread-safe syntax and then display in your Form(s).
>>
>> ****************************************************************
>> Advices about server with high cnx/dcnx rate with few datas to
>> transfert each cnx
>> ****************************************************************
>>
>> --- please add your comments.
>>
>> ************************************************************************
>> Adives for servers with low cnx/dcnx rate but large datas to transfert
>> (or low speed bandwidth that will make server permanently send data)
>> ************************************************************************
>>
>> --- please add your comments.
>>
>> **************************
>> Windows TCP informations
>> **************************
>>
>> - Sockets cannot be allocated in swapped memory.
>> - By default, non paged memory is 1/4 of physical memory with a max of
>>  256MB on Win2K and 128MB on NT4.
>> - Could the 1/4 max value be increased thru some registry key ???
>> - Each socket uses approx 10KB of non paged physical memory.
>>
>> **********************
>> Some registry tuning
>> **********************
>>
>> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
>>
>> TcpTimedWaitDelay = 30 (make TIME_WAIT sockets alive for 30 seconds only)
>> MaxUserPort = 65534
>> MaxHashTableSize = 65536 default 512
>> MaxFreeTwTcbs = 2000
>> MaxFreeTcbs = 16000 default 1000
>> MaxUserPort = 65534
>> TcpWindowSize = 65535 default 8192
>> MaxHashTableSize = 512
>> TcpNumConnections = 1000
>> NumTcbTablePartitions = 32 default 4
>>
>> All keys explained at but you could add you own comments :
>>
>> http://www.microsoft.com/resources/documentation/Windows/2000/server/reskit/en-us/regentry/33563.asp
>>
>> *************************
>> End of Information Note
>> *************************
>>
>> -- 
>> To unsubscribe or change your settings for TWSocket mailing list
>> please goto http://www.elists.org/mailman/listinfo/twsocket
>> Visit our website at http://www.overbyte.be
>
> -- 
> To unsubscribe or change your settings for TWSocket mailing list
> please goto http://www.elists.org/mailman/listinfo/twsocket
> Visit our website at http://www.overbyte.be 

-- 
To unsubscribe or change your settings for TWSocket mailing list
please goto http://www.elists.org/mailman/listinfo/twsocket
Visit our website at http://www.overbyte.be

Reply via email to