REGEDIT4

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters]

"KeepAliveTime"=dword:000927c0
; 0000ea60 = 60сек =1мин
; 000927c0 = 600сек=10мин

"KeepAliveInterval"=dword:000003e8
; 000003e8 = 1сек

"TcpMaxDataRetransmissions"=dword:0000000a
; 0000000a = 10

;-- V.Shulzhenko DBA_Tools ----------------------------------------------------------------------------
;
; При обрыве клиента (завис комп, обрыв модемного соединения и пр.) сессии Informix, порожденные этим клиентом,
; остаются жить еще очень долго, не освобождая ресурсы. Дело в том, что Информикс держит сессию , потому что не знает,
; что клиент уже "умер", так как сетевое соединение на уровне ОС (TCP IP) продолжает жить.
; По умолчанию Windows только через 2 часа прибьет такое мертвое соединение и исходя из этого и Informix закроет сессию.
; Чтобы ускорить этот процесс нужно изменить выше приведенные ключи реестра (которые по умолчанию вообще отсутствуют
; в реестре и используются значения по умолчанию).
; При изменении предлагаемых значений внимательно прочитайте описание ключей из Resource Kit.
;-------------------------------------------------------------------------------------------------------
; KeepAliveTime
;Data type Range Default value
;REG_DWORD 0x1-0xFFFFFFFF (milliseconds) 0x6DDD00 (7,200,000 milliseconds = 2 hours)
;
;Determines how often TCP sends keep-alive transmissions. TCP sends keep-alive transmissions to verify that
;an idle connection is still active.
;This entry is used when the remote system is responding to TCP. Otherwise, the interval between transmissions
;is determined by the value of the KeepAliveInterval entry.
;By default, keep-alive transmissions are not sent. The TCP keep-alive feature must be enabled by a program,
;such as Telnet, or by an Internet browser, such as Internet Explorer.
; ========================
; Примечание V.Shulzhenko: Informix эту возможность использует, т.е. TCP keep-alive включена по умолчанию.
; ========================
; -- Xteq Systems X-Setup --
;This setting controls how often the server should check if an idle connection is still "alive" by sending
;a single TCP/IP packet to the client.
;If the client does not react on this keep alive packet, the keep alive connection is freed and thus freeing resources.
;The default value is 7200 seconds (two hours), a good value is 600 seconds(10 minutes).
;-------------------------------------------------------------------------------------------------------
;KeepAliveInterval
;
;Data type Range Default value
;REG_DWORD 0x1-0xFFFFFFFF (milliseconds) 0x3E8 (1,000 milliseconds = 1 second)
;
;Determines how often TCP repeats keep-alive transmissions when no response is received.
;TCP sends keep-alive transmissions to verify that idle connections are still active.
;This prevents TCP from inadvertently disconnecting active lines.
;-------------------------------------------------------------------------------------------------------
;TcpMaxDataRetransmissions
;
;Data type Range Default value
;REG_DWORD 0x0-0xFFFFFFFF (retransmission attempts) 0x5
;
;Determines how many times TCP retransmits an unacknowledged data segment on an existing connection.
;TCP retransmits data segments until they are acknowledged or until this value expires.
;TCP/IP adjusts the frequency of retransmissions over time. TCP establishes an initial retransmission
;interval by measuring the round trip time on the connection. The interval doubles with each successive
;retransmission on a connection, and it is reset to the initial value when responses resume.
;
;This entry determines how many times TCP retransmits data segments. The maximum number of retransmissions
;of requests for new connections is determined by the value of the TcpMaxConnectRetransmissions entry.
;-------------------------------------------------------------------------------------------------------
; Note
;Windows 2000 does not add this entrys to the registry. You can add it by editing the registry or by using
;a program that edits the registry.