HOW TO BUILD RUNSTATS ?
Requisites :
1. ability to user access V$STATNAME, V$MYSTAT, v$TIMER and V$LATCH.
2. grant privileges on user to V_$STATNAME, V_$MYSTAT, V_$TIMER, V_$LATCH that are all owned by SYS.
3. ability to create table, view and package .
Implementation:
1. grant privileges to user
SQL> conn sys/[pswd] as sysdba
Connected.
SQL> grant connect, resource to [user];
Grant succeeded.
SQL> grant create view to [user];
Grant succeeded.
SQL> grant select on v_$statname to [user];
Grant succeeded.
SQL> grant select on v_$mystat to [user];
Grant succeeded.
SQL> grant select on v_$latch to [user];
Grant succeeded.
SQL> grant select on v_$timer to [user];
Grant succeeded.
2. create temporary table ‘run_stats’ and view ’stats’
SQL> conn [user]/[pswd]
Connected.
create global temporary table run_stats
( runid varchar2 (15),
name varchar2 (80),
value int )
on commit preserve rows;create or replace view stats
as select ‘STAT…’ || a.name name, b.value
from v$statname a, v$mystat b
where a.statistic# = b.statistic#
union all
select ‘LATCH.’ || name, gets
from v$latch
union all
select ‘STAT…Elapsed Time’, hsecs from v$timer;
3. create package of runstats_pkg that includes three process to implement during test steps.
create or replace package runstats_pkg
as
procedure rs_start;
procedure rs_middle;
procedure rs_stop( p_difference_threshold in number default 0 );
end;
/create or replace package body runstats_pkg
asg_start number;
g_run1 number;
g_run2 number;procedure rs_start
is
begin
delete from run_stats;insert into run_stats
select ‘before’, stats.* from stats;g_start := dbms_utility.get_time;
end;procedure rs_middle
is
begin
g_run1 := (dbms_utility.get_time-g_start);insert into run_stats
select ‘after 1′, stats.* from stats;
g_start := dbms_utility.get_time;end;
procedure rs_stop(p_difference_threshold in number default 0)
is
begin
g_run2 := (dbms_utility.get_time-g_start);dbms_output.put_line
( ‘Run1 ran in ‘ || g_run1 || ‘ hsecs’ );
dbms_output.put_line
( ‘Run2 ran in ‘ || g_run2 || ‘ hsecs’ );
dbms_output.put_line
( ‘run 1 ran in ‘ || round(g_run1/g_run2*100,2) ||
‘% of the time’ );
dbms_output.put_line( chr(9) );insert into run_stats
select ‘after 2′, stats.* from stats;dbms_output.put_line
( rpad( ‘Name’, 30 ) || lpad( ‘Run1′, 12 ) ||
lpad( ‘Run2′, 12 ) || lpad( ‘Diff’, 12 ) );for x in
( select rpad( a.name, 30 ) ||
to_char( b.value-a.value, ‘999,999,999′ ) ||
to_char( c.value-b.value, ‘999,999,999′ ) ||
to_char( ( (c.value-b.value)-(b.value-a.value)), ‘999,999,999′ ) data
from run_stats a, run_stats b, run_stats c
where a.name = b.name
and b.name = c.name
and a.runid = ‘before’
and b.runid = ‘after 1′
and c.runid = ‘after 2′
– and (c.value-a.value) > 0
and abs( (c.value-b.value) – (b.value-a.value) )
> p_difference_threshold
order by abs( (c.value-b.value)-(b.value-a.value))
) loop
dbms_output.put_line( x.data );
end loop;dbms_output.put_line( chr(9) );
dbms_output.put_line
( ‘Run1 latches total versus runs — difference and pct’ );
dbms_output.put_line
( lpad( ‘Run1′, 12 ) || lpad( ‘Run2′, 12 ) ||
lpad( ‘Diff’, 12 ) || lpad( ‘Pct’, 10 ) );for x in
( select to_char( run1, ‘999,999,999′ ) ||
to_char( run2, ‘999,999,999′ ) ||
to_char( diff, ‘999,999,999′ ) ||
to_char( round( run1/run2*100,2 ), ‘99,999.99′ ) || ‘%’ data
from ( select sum(b.value-a.value) run1, sum(c.value-b.value) run2,
sum( (c.value-b.value)-(b.value-a.value)) diff
from run_stats a, run_stats b, run_stats c
where a.name = b.name
and b.name = c.name
and a.runid = ‘before’
and b.runid = ‘after 1′
and c.runid = ‘after 2′
and a.name like ‘LATCH%’
)
) loop
dbms_output.put_line( x.data );
end loop;
end;Example of runstats:
