
	To operate ROB needs to hold some session data. Every time a page is requested 
	 by the Browser from the ROB cartridge in the WebServer, a new session context is
	 created by the ROB database application. This new session context is derived from
	 the session that did the page request superseded by any new context settings passed
	 along in the page request. To properly support the Back operation in the Web Browser,
	 as well as return to URLs visited in earlier sessions, the Session information is
	 recorded by ROB in a table called ODWA_SESSIONS. The number of rows in this table
	 increases with the number of page requests done from the ROB application. <BR>This
	 does not only mean that database space is held, it also results in slight but eventually
	 noticeable performance degradation for new page requests, since every time the originating
	 session record is looked up in this table.<BR>It is recommended to periodically
	 purge this old session data through this screen. 
	