Set this configuration variable to 1 to indicate that no processes accessing any Vision files in use by this process are using V_LOCK_METHOD=2. The default value is 0.

Using V_BUFFER_DATA=1 with V_LOCK_METHOD=2 may cause file corruption, and so this variable was introduced as a way to protect users from inadvertently turning on V_LOCK_METHOD=2 when they already have V_BUFFER_DATA turned on. In order to have Vision buffer data blocks, V_BUFFER_DATA and V_NO_ASYNC_CACHE_DATA must be set to 1 and you must not be using V_LOCK_METHOD=2 with any process accessing those files.