I/O Calibration -測試數據庫性能
阿新 • • 發佈:2018-05-08
I/O Calibration測試數據庫系統性能步驟如下:
oracle@mmpt-SRJ:~> 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 / ##看結果 max_iops = 6861 latency = 0 max_mbps = 502 PL/SQL procedure successfully completed. SQL>
I/O Calibration -測試數據庫性能