JSI Tip 9318. Is there a delay after an Opportunistic Locking unlock request?

I discussed Opportunistic Locking in the following tips:

3108 How do I configure Opportunistic Locking on Windows NT and Windows 2000?

9317 Tuning Opportunistic Locking.

0130 Is there a delay when saving documents to a Server Share?

1447 How do I run old MS-DOS database application on my network?

9316 How do prevent Windows clients from requesting an opportunistic locks on a remote file?

When the redirector unlocks data in response to an unlock request, the action should be immediate, by default.

If you experience a delay, insure that the UseUnlockBehind Value Name, a REG_DWORD data type, at HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesLanmanWorkstationParameters is set to 1.

If UseUnlockBehind is set to 0, the unlock-behind optimization feature is disabled.