to much time to execute query

Hello list,

This query is taking to much time (26 secs). What can be the problem ? Is the query not written properly ? All other queries involving v$sesstat amd v$statname do not take this much time.

--->

select sum(value)/1024||' KB' as Kilo,b.name from v$sesstat a,v$statname b where a.statistic# in (select b.statistic# from v$statname where b.name like '% uga %') group by b.name;

TIA Tc

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: 
  INET: brain_damage_at_eth.net

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
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).