When cursor_sharing is set to FORCE, it will force cursors that are the same except for literals to use the same cursor.
Setting cursor_sharing = similar will allow to Oracle optimizer to consider issues such as data distribution when deciding to reuse a cursor.
You also can implement cursor sharing on a session-by-session basis as well. This change will only be effective for that session. This change is made using the alter session command as seen in this example:
ALTER SESSION SET cursor_sharing=SHARED;