~> oerr ora 0023
00023, 00000, "session references process private memory; cannot detach session"
/ *Cause: An attempt was made to detach the current session when it contains
/ references to process private memory.
/ *Action: A session may contain references to process memory (PGA) if it has
/ an open network connection, a very large context area, or operating
/ system privileges. To allow the detach, it may be necessary to
/ close the session's database links and/or cursors. Detaching a
/ session with operating system privileges is always disallowed.