This variable causes the system's buffers to be flushed on the first WRITE, REWRITE, or DELETE that occurs after an indexed file is opened for I/O. The purpose of this is to update the user count field in the file's header to keep it accurate. When this configuration variable is set to 1 (on, true, yes), this feature is turned on; when set to 0 (off, false, no), it's turned off. The default setting is "0".