Oracle IO鎬ц兘娴嬭瘯

Posted 2020-12-15

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Oracle IO鎬ц兘娴嬭瘯

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SELECT d.name,
       i.asynch_io
FROM   v$datafile d,
       v$iostat_file i
WHERE  d.file# = i.file_no
AND    i.filetype_name  = 鈥?/span>Data File鈥?/span>;

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ALTER SYSTEM SET filesystemio_options=setall SCOPE=SPFILE;
SHUTDOWN IMMEDIATE;
STARTUP锛?/span>

娴嬭瘯鑴氭湰

SET SERVEROUTPUT ON
DECLARE
  l_latency    PLS_INTEGER;
  l_iops    PLS_INTEGER;
  l_mbps    PLS_INTEGER;
BEGIN
        DBMS_RESOURCE_MANAGER.calibrate_io (num_physical_disks => 1,
            max_latency            => 20,
            max_iops            => l_iops,
            max_mbps            => l_mbps,
            actual_latency        => l_latency);
   DBMS_OUTPUT.put_line(鈥?/span>Max IOPS = 鈥?/span> || l_iops);
   DBMS_OUTPUT.put_line(鈥?/span>Max MBPS = 鈥?/span> || l_mbps);
   DBMS_OUTPUT.put_line(鈥?/span>Latency  = 鈥?/span> || l_latency);
 END;
/

缁撴灉杈撳嚭鏍蜂緥

SYS@test1> SET SERVEROUTPUT ON
SYS@test1> DECLARE
  2    l_latency        PLS_INTEGER;
  3    l_iops   PLS_INTEGER;
  4    l_mbps   PLS_INTEGER;
  5  BEGIN
  6             DBMS_RESOURCE_MANAGER.calibrate_io (num_physical_disks => 1,
  7                     max_latency                     => 20,
  8                     max_iops                        => l_iops,
  9                     max_mbps                        => l_mbps,
 10                     actual_latency          => l_latency);
 11     DBMS_OUTPUT.put_line(鈥?/span>Max IOPS = 鈥?/span> || l_iops);
 12     DBMS_OUTPUT.put_line(鈥?/span>Max MBPS = 鈥?/span> || l_mbps);
 13     DBMS_OUTPUT.put_line(鈥?/span>Latency  = 鈥?/span> || l_latency);
 14   END;
 15  /
Max IOPS = 161
Max MBPS = 8
Latency  = 24

PL/SQL procedure successfully completed.

SYS@test1> /
Max IOPS = 107
Max MBPS = 8
Latency  = 18

PL/SQL procedure successfully completed.


SYS@test1> /
Max IOPS = 152
Max MBPS = 8
Latency  = 25

PL/SQL procedure successfully completed.

缁熻娴嬭瘯缁撴灉

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鎸囨爣	single-DB			RAC-DB1			RAC-DB2
鏈€澶OPS	518	445	469	161	107	152	13290	12587	12937	12811
鏈€澶у悶鍚愰噺	92	96	92	8	8	8	106	108	107	107
骞冲潎寤惰繜	5	6	5	24	18	25	18	18	19	20