物化视图性能测试

SQL> set timing on
SQL> select count(1) from ta_textparameter;
  COUNT(1)
----------
  21810871
Executed in 1.477 seconds

SQL> alter table t_ta_textparameter add primary key (L_ROWID);
Table altered
Executed in 68.341 seconds

SQL> create materialized view log on t_ta_textparameter;
Materialized view log created
Executed in 0.227 seconds

create public database link src_14_dblink
connect to hs_tabase identified by "hs_tabase"
using 
'(DESCRIPTION =(ADDRESS = (PROTOCOL = TCP)(HOST = 10.20.30.14)(PORT = 1521))
(CONNECT_DATA =(SERVER = DEDICATED)(SERVICE_NAME = ora11g))
 )';

SQL> set timing on
SQL> 
SQL> create materialized view mv_t_textparamter_nopara
  2  refresh on demand fast
  3  as
  4  select * from t_ta_textparameter@src_14_dblink;
Materialized view created
Executed in 190.153 seconds

SQL> alter session enable parallel dml;
Session altered
Executed in 0.01 seconds

SQL> 
SQL> create materialized view mv_t_textparamter_para
  2  refresh on demand fast
  3  as
  4  select /*+ parallel(a 4) */ * from t_ta_textparameter@src_14_dblink a;
Materialized view created
Executed in 164.659 seconds

SQL> begin
  2   dbms_mview.refresh(list => 'mv_t_textparamter_nopara');
  3  end;
  4  /
PL/SQL procedure successfully completed
Executed in 19.481 seconds

SQL> begin
  2   dbms_mview.refresh(list => 'mv_t_textparamter_para');
  3  end;
  4  /
PL/SQL procedure successfully completed
Executed in 18.481 seconds

 select * from v$pq_sesstat;

select * from v$px_process;

select * from v$active_session_history;

https://www.cnblogs.com/linjiqin/archive/2012/05/23/2514795.html

http://blog.itpub.net/26390465/viewspace-1795418/