20. Writing 4GL Statements : Multiple Session Connections : Multiple Sessions and the DBMS
 
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Multiple Sessions and the DBMS
The DBMS treats each session in a multiple-session application as an individual application. When you are creating multiple-session applications, keep the following points in mind:
Be sure that the server parameter connect_limit is large enough to accommodate the number of sessions required by the application. For details, see the System Administrator Guide.
In a multiple-session application, the application can encounter deadlock against itself. For example, one session can attempt to update a table that was locked by another session.
An application can also lock itself out in an undetectable manner. For example, if a table is updated in a transaction in one session and then selected from in another transaction in a second session, the second session waits indefinitely.