Open cursors are database objects that represent a set of rows that have been retrieved from a database. They are used to hold the data in memory until it is needed by the application. If too many open cursors are left open, it can lead to performance problems. As a result, it is important to check open cursors regularly and close any that are no longer needed.
There are a few different ways to check open cursors in Oracle. One way is to use the V$OPEN_CURSOR view. This view contains information about all of the open cursors in the database.