Resourcetimeout Option

The  MSHTTP option specifies the time, in seconds, after which   flushes cached session data from memory. Lower values will use less memory and higher values incur less overhead from resynchronizing from the session database. For correct session expiration this timeout is never higher than half the session timeout  (and   enforces this). The default is min (,  /2), thus normally  , (corresponding to 15 minutes), unless   has been set to an unusually low value.

The default value is: 900

See also:
 * sessiontimeout Option
 * MSHTTP options