runstats脚本目的：

对做同一件事的两个不同方法进行比较，得出孰优孰劣的结果。

实操中注意事项：

在创建runstats_pkg包时一直报权限不足，执行 grant create procedure to user ;   即可。

(自己的数据库，当然有dba用户了)

关于用户权限的几个命令：

grant create session to zs;

grant create session,create table to zs;

grant connect to zs;

grant connection,resource to zs;

grant select on zs.x to ls;

grant insert,update on zs.x to ls;

附 脚本代码：

set echo on

drop table run_stats;

create global temporary table run_stats

( runid varchar2(15),

name varchar2(80),

value int )

on commit preserve rows;

grant select any table to ops$tkyte;

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;

delete from run_stats;

commit;

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

as

g_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_cpu_time;

end;

procedure rs_middle

is

begin

g_run1 := (dbms_utility.get_cpu_time-g_start);

insert into run_stats

select 'after 1', stats.* from stats;

g_start := dbms_utility.get_cpu_time;

end;

procedure rs_stop(p_difference_threshold in number default 0)

is

begin

g_run2 := (dbms_utility.get_cpu_time-g_start);

dbms_output.put_line

( 'Run1 ran in ' || g_run1 || ' cpu hsecs' );

dbms_output.put_line

( 'Run2 ran in ' || g_run2 || ' cpu hsecs' );

if ( g_run2 <> 0 )

then

dbms_output.put_line

( 'run 1 ran in ' || round(g_run1/g_run2*100,2) ||

'% of the time' );

end if;

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/decode( run2, 0, to_number(0), 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;

end;

/

commit;

/*

exec runStats_pkg.rs_start;

exec runStats_pkg.rs_middle;

exec runStats_pkg.rs_stop;

*/

标签：dbms,stats,name,编程,999,value,Oracle,run,runstats

来源： https://blog.csdn.net/shafatutu/article/details/100746692