Oracle on NT - Slow performance

We are having problems with slow response time on Oracle 8.1.6 on an NT server. The slow response time occurs even where are no users on the server. Sometime the logon takes 30 seconds. I noticed the following sql is being executed by the system quite a few times and does a lot of buffer gets. Does anyone have any idea what could be slowing down the server and why the sql is being executed?

SELECT SYNNAM
, DBMS_JAVA.LONGNAME(SYNNAM)
, DBMS_JAVA.LONGNAME(SYNTAB)
, TABOWN
, TABNODE
, PUBLIC$
, SYNOWN
, SYNOWNID

FROM SYS.EXU8SYN
WHERE SYNOWNID != 0
ORDER BY SYNOWNID
, SYNTIME

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Smith, Ron L.
  INET: rlsmith_at_kmg.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).