min_sessions and max_sessions determine the minimum and maximum number of user connections allowed for the Full-Text Search engine. Each user connection requires about 5MB of memory. Do not set max_sessions to an amount that exceeds your available memory. Also, because the memory for min_sessions is allocated at start-up, if you set the number for min_sessions extremely high (to allow for a large number of user connections), a large percentage of your memory will be dedicated to user connections for the Full-Text Search engine.
You may improve the performance of the Full-Text Search engine by setting min_sessions equal to the average number of user sessions that will be used. Doing so prevents the Full-Text Search engine from having to allocate memory at the start of the user session.
