I/O Calibration -测试数据库性能

测试数据库系统性能步骤如下：

[email protected]:~> sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Tue May 8 08:22:51 2018

Copyright (c) 1982, 2009, Oracle.  All rights reserved.

Connected to an idle instance.

SQL>
SQL>
SQL> startup
ORACLE instance started.

Total System Global Area  784998400 bytes
Fixed Size                  2217464 bytes
Variable Size             499124744 bytes
Database Buffers          281018368 bytes
Redo Buffers                2637824 bytes
Database mounted.
Database opened.
SQL> select open_mode from v$database;

OPEN_MODE
--------------------
READ WRITE

SQL>
SQL>
SQL> SET SERVEROUTPUT ON
SQL> DECLARE
  2    lat  INTEGER;
  3    iops INTEGER;
  4    mbps INTEGER;
  5  BEGIN
  6  -- DBMS_RESOURCE_MANAGER.CALIBRATE_IO (<DISKS>, <MAX_LATENCY>, iops, mbps, lat);
  7     DBMS_RESOURCE_MANAGER.CALIBRATE_IO (2, 10, iops, mbps, lat);
  8
  9    DBMS_OUTPUT.PUT_LINE (‘max_iops = ‘ || iops);
 10    DBMS_OUTPUT.PUT_LINE (‘latency  = ‘ || lat);
 11    dbms_output.put_line(‘max_mbps = ‘ || mbps);
 12  end;
 13  /
DECLARE
*
ERROR at line 1:
ORA-56708: Could not find any datafiles with asynchronous i/o capability
ORA-06512: at "SYS.DBMS_RMIN", line 456
ORA-06512: at "SYS.DBMS_RESOURCE_MANAGER", line 1285
ORA-06512: at line 7

SQL> show parameter filesystem

NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
filesystemio_options                 string      none
SQL> alter system set filesystemio_options=setall scope=spfile;

System altered.

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.

Total System Global Area  784998400 bytes
Fixed Size                  2217464 bytes
Variable Size             499124744 bytes
Database Buffers          281018368 bytes
Redo Buffers                2637824 bytes
Database mounted.
Database opened.
SQL>
SQL>
SQL> COL NAME FORMAT A50
SQL> SELECT NAME,ASYNCH_IO FROM V$DATAFILE F,V$IOSTAT_FILE I
  2  WHERE  F.FILE#=I.FILE_NO
  3  AND    FILETYPE_NAME=‘Data File‘;

NAME                                               ASYNCH_IO
-------------------------------------------------- ---------
/fantlam/oracle/app/oracle/oradata/mmpt/system01.d ASYNC_ON
bf

/fantlam/oracle/app/oracle/oradata/mmpt/sysaux01.d ASYNC_ON
bf

/fantlam/oracle/app/oracle/oradata/mmpt/undotbs01. ASYNC_ON
dbf

/fantlam/oracle/app/oracle/oradata/mmpt/users01.db ASYNC_ON
f

NAME                                               ASYNCH_IO
-------------------------------------------------- ---------

SQL> col name for a60
SQL> SELECT NAME,ASYNCH_IO FROM V$DATAFILE F,V$IOSTAT_FILE I
  2  WHERE  F.FILE#=I.FILE_NO
  3  AND    FILETYPE_NAME=‘Data File‘;

NAME                                                         ASYNCH_IO
------------------------------------------------------------ ---------
/fantlam/oracle/app/oracle/oradata/mmpt/system01.dbf         ASYNC_ON
/fantlam/oracle/app/oracle/oradata/mmpt/sysaux01.dbf         ASYNC_ON
/fantlam/oracle/app/oracle/oradata/mmpt/undotbs01.dbf        ASYNC_ON
/fantlam/oracle/app/oracle/oradata/mmpt/users01.dbf          ASYNC_ON

SQL> SET SERVEROUTPUT ON
SQL> DECLARE
  2    lat  INTEGER;
  3    iops INTEGER;
  4    mbps INTEGER;
  5  BEGIN
  6  -- DBMS_RESOURCE_MANAGER.CALIBRATE_IO (<DISKS>, <MAX_LATENCY>, iops, mbps, lat);
  7     DBMS_RESOURCE_MANAGER.CALIBRATE_IO (2, 10, iops, mbps, lat);
  8
  9    DBMS_OUTPUT.PUT_LINE (‘max_iops = ‘ || iops);
 10    DBMS_OUTPUT.PUT_LINE (‘latency  = ‘ || lat);
 11    dbms_output.put_line(‘max_mbps = ‘ || mbps);
 12  end;
 13  /
 ##看结果
max_iops = 6861
latency  = 0
max_mbps = 502

PL/SQL procedure successfully completed.

SQL>

原文地址：http://blog.51cto.com/roidba/2113820