oracle内置IO测试包

在Oracle 11g中dbms_resource_manager PL/SQL包提供了calibrate_io过程可以用来对Oracle数据库的IO子系统进行IO能力测试,

 

在使用前,先要满足以下条件:

The user must be granted the SYSDBA privilege

timed_statistics must be set to TRUE
Asynchronous I/O must be enabled   When using file systems, asynchronous I/O can be enabled by setting the FILESYSTEMIO_OPTIONS initialization parameter to SETALL. Ensure that asynchronous I/O is enabled for data files by running the following query:   COL NAME FORMAT A50   SELECT NAME,ASYNCH_IO FROM V$DATAFILE F,V$IOSTAT_FILE I WHERE F.FILE#=I.FILE_NO AND FILETYPE_NAME='Data File';

  

其使用方法如下:

SQL> SET SERVEROUTPUT ON
SQL> DECLARE
   lat INTEGER;
   iops INTEGER;
   mbps INTEGER;
   BEGIN
   -- DBMS_RESOURCE_MANAGER.CALIBRATE_IO (, , iops, mbps, lat);
   DBMS_RESOURCE_MANAGER.CALIBRATE_IO (2, 10, iops, mbps, lat);
   DBMS_OUTPUT.PUT_LINE ('max_iops = ' || iops);
   DBMS_OUTPUT.PUT_LINE ('latency = ' || lat);
   dbms_output.put_line('max_mbps = ' || mbps);
   end;
   /

max_iops = 135540
max_mbps = 2593
latency  = 0

PL/SQL procedure successfully completed.

  


上面的输出信息中的max_iops,说明IO子系统的每秒IO请求次数,latency,说明IO子系统的延迟是 ms。max_mbps,说明每少的最大处理能力是 MB。

在dbms_resource_manager.calibrate_io执行时可以查看其状态

SQL> select * from V$IO_CALIBRATION_STATUS;

STATUS        CALIBRATION_TIME
------------- -----------------------------
IN PROGRESS

 

在dbms_resource_manager.calibrate_io执行完后可以查看其结果

SQL> select * from DBA_RSRC_IO_CALIBRATE;

START_TIME                         END_TIME                           MAX_IOPS   MAX_MBPS  MAX_PMBPS    LATENCY NUM_PHYSICAL_DISKS
---------------------------------- -------------------------------- ---------- ---------- ---------- ---------- ------------------
11-OCT-16 04.53.17.202399 PM       11-OCT-16 05.02.21.056682 PM           2643        388         39          8                  2

 

这个功能相对于Oracle提供的Orion工具来说使用更简单,但它必须创建数据库并且在11g及以后版本才能使用。

 

参考文档:

http://docs.oracle.com/cd/E18283_01/server.112/e16638/iodesign.htm#insertedID3

 

 
 

 

posted @ 2020-08-05 15:36  喝水鱼  阅读(411)  评论(0编辑  收藏  举报