MaxUnackedPacket
Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2
HKLM\SOFTWARE\Microsoft\MSMQ\Parameters
| Data type | Range | Default value |
|---|---|---|
REG_DWORD |
0x0–0xFFFFFFFFMessages |
0x40 (64 Messages) |
Description
Specifies the maximum size of the message queue to each network session. The value of this entry limits the number and size of messages that can be stored between internal acknowledgments from the receiving server. If the queue fills before an acknowledgment is received, additional messages are discarded.
If the queue is too small, messages might be lost. But because messages in the queue are released again when a session fails, a large queue can flood the system with duplicate messages.
This entry does not exist in the registry by default. You can add it by using the registry editor Regedit.exe.