Here is the example on Oracle XE;

SELECT pname, pval1 FROM sys.aux_stats$ WHERE sname = ‘SYSSTATS_MAIN’;

PNAME PVAL1
—————————— ———-
CPUSPEED 515
CPUSPEEDNW 506,097
IOSEEKTIM 12,242
IOTFRSPEED 21258,578
MAXTHR 6489088
MBRC 78
MREADTIM 34,979
SLAVETHR
SREADTIM 7,798

9 rows selected.

execute dbms_random.seed(0)
drop table t1 purge;
create table t1 as select
rownum id,
trunc(dbms_random.value(1,50)) n1,
rpad(‘x’,100) padding
from all_objects where rownum user,
tabname =>’T1′,
cascade => true,
estimate_percent => null,
granularity => ‘default’,
method_opt => ‘for all columns size 1′ );
end;
/
variable m_n1 number
execute :m_n1 := 10;
explain plan set statement_id ‘xyz’ for
select n1, padding from t1 where id = :m_n1;
select * from table(dbms_xplan.display(‘plan_table’,'xyz’));
..
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
..
| 0 | SELECT STATEMENT | | 1 | 107 | 2 (0)| 00:00:01 |
..
HR on 12/12/2006 at XE > select round(2 * 7.798 / 1000, 3) time from dual ;

TIME
———-
,016

Kind regards,
Tonguç