Top SQL (Buffer Gets)

This script will list the top 5 SQL statements sorted by the most number of buffer gets or logical reads

set serverout on size 1000000

declare

top5 number;

text1 varchar2(4000);

x number;

len1 number;

Cursor c1 is

select buffer_gets,substr(sql_text,1,4000)

from v$sqlarea

order by buffer_gets desc;

begin

dbms_output.put_line('Reads'||'  '||'                          Text');

dbms_output.put_line ('-----'||'  '||'---------------------------------------------------');

dbms_output.put_line('      ');

open c1;

for i in 1 .. 5 loop

fetch c1 into top5, text1;

dbms_output.put_line(rpad(to_char(top5),9)|| ' '||substr(text1,1,66));

len1 :=length(text1);

x := 66;

while len1 > x-1 loop

dbms_output.put_line('"         '||substr(text1,x,64));

x := x+64;

end loop;

end loop;

end;

/