CPU being used on the LIVE database server

Hi,
I'm seeing a lot of CPU being used on the LIVE database server, primarily by sessions running the following SQL :- As this is for audit log and a developer wrote it how can i optimize it or advise me pls
select * from ( select this_.ID as ID22_0_, this_.EVENT_TIME as EVENT2_22_0_, this_.AUDIT_LOG_EVENT_ID as AUDIT3_22_0_, this_.USER_ID as USER4_22_0_, this_.PUBLIC_OBJECT_ID as PUBLIC5_22_0_, this_.DESCRIPTION as DESCRIPT6_22_0_ from AUDIT_LOG this_ where this_.PUBLIC_OBJECT_ID=:1 order by this_.ID desc ) where rownum <= :2
thanks

It's a Top-N query and can be better written this way:
select this_.ID as ID22_0_, this_.EVENT_TIME as EVENT2_22_0_,
       this_.AUDIT_LOG_EVENT_ID as AUDIT3_22_0_,
       this_.USER_ID as USER4_22_0_, this_.PUBLIC_OBJECT_ID as PUBLIC5_22_0_,
       this_.DESCRIPTION as DESCRIPT6_22_0_
from (select AUDIT_LOG.*, row_number() over (Order by ID desc) rn
          from AUDIT_LOG
     where PUBLIC_OBJECT_ID=:1 ) this_
where rn <= :2I don't know if it will solve your issue...there are so many other variables...
Max
http://oracleitalia.wordpress.com

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Message was edited by:
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Recovery Manager: Release 11.2.0.1.0 - Production on Wed Jun 5 13:00:15 2013
Copyright (c) 1982, 2009, Oracle and/or its affiliates. All rights reserved.
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bold Index GLPCA~1. bold
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