RE: Index Usage Monitoring

From: Trassens, Christian <CTrassens_at_uni2.es>
Date: Tue, 06 Feb 2001 02:24:36 -0800
Message-ID: <F001.002ABAF4.20010206004205@fatcity.com>

Or set a cron to check periodically the sql area. With something like this:

set serverout on
set termout off
spool $SPOOLNAME
declare
-- exclude statements with v$sqlarea.parsing_schema_id = 0 (SYS)

cursor c1 is select     address, sql_text, DISK_READS, EXECUTIONS, 
        PARSE_CALLS 
        from v$sqlarea where    command_type in (2,3,6,7) 
                                and parsing_schema_id != 0; 
cursor c2 is select addr, sql_text from sqltemp; 
        addr2 varchar(16); 

sqltext v$sqlarea.sql_text%type;
dreads v$sqlarea.disk_reads%type;
execs v$sqlarea.executions%type;
pcalls v$sqlarea.parse_calls%type;
begin

        open c1; 
        fetch c1 into addr2,sqltext,dreads,execs,pcalls; 
        while (c1%found) loop 
                insert into sqltemp
values(addr2,sqltext,dreads,execs,pcalls); 
                commit; 
                fetch c1 into addr2,sqltext,dreads,execs,pcalls; 
        end loop; 
        close c1; 
        open c2; 
        fetch c2 into addr2, sqltext; 
        while (c2%found) loop 
                do_explain(addr2,sqltext); 
                fetch c2 into addr2, sqltext; 
        end loop; 
        close c2; 
        dbms_output.put_line('Ejecutado sin inconvenientes');
exception when others then
                dbms_output.put_line('ERROR: '||sqlerrm(sqlcode));

end;
/
spool off

> -----Mensaje original-----
> De: Vadim Gorbounov [SMTP:vgorbounov_at_simplyengineering.com]
> Enviado el: lunes 5 de febrero de 2001 16:31
> Para: Multiple recipients of list ORACLE-L
> Asunto: RE: Index Usage Monitoring
>
> Hi,
> Why not to use otrace? Of cource, you may need some space to save
> trace results, but you'll definitely get complete statistics.
>
> Vadim Gorbounov
> Oracle DBA
>
> -----Original Message-----
> Sent: Tuesday, January 30, 2001 3:57 PM
> To: Multiple recipients of list ORACLE-L
>
>
> We have a purchased application with over 1,300 indexes.
>
> Can someone suggest a method to monitor the system to
> determine which indexes are actively being used over time? I'm assuming
> that some are old/not necessary and would like to save the overhead
> of maintaining them.
>
> Oracle 8.0.6
>
>
> Patrick Prince email: pprince_at_oppd.com
> Omaha Public Power District voice: (402) 636-3762
> 444 S 16th St. Mall, Omaha, NE 68102 fax: (402) 636-3931
>
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: PRINCE, PATRICK W.
> INET: pprince_at_oppd.com
>
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> INET: vgorbounov_at_simplyengineering.com
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Trassens, Christian
  INET: CTrassens_at_uni2.es

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
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Received on Tue Feb 06 2001 - 04:24:36 CST