测试oracle数据库的io

SQL> set serveroutput on
SQL> declare
lat integer;
iops integer;
mbps integer;
begin
–dbms_resource_manager.calibrate_io(<num_disks>,<max_latency>,iops,mbps,lat);
dbms_resource_manager.calibrate_io(68,10,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=18882 持续中每秒请求最大i/o的数量
latency=10 平均延迟
max_mbps=3160 持续中最大的吞吐量M为单位

max_iops=134
latency=29
max_mbps=534

PL/SQL procedure successfully completed.

SQL> select * from dba_rsrc_io_calibrate;

START_TIME

END_TIME

MAX_IOPS MAX_MBPS MAX_PMBPS LATENCY NUM_PHYSICAL_DISKS

---

17-DEC-18 03.39.03.566802 PM
17-DEC-18 03.45.41.369984 PM
18882 3160 172 10 68
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

SQL参数说明

Parameter Description
num_physical_disks
Approximate number of physical disks in the database storage（物理磁盘个数 input）

max_latency
Maximum tolerable latency in milliseconds for database-block-sized IO requests（最大可用容忍延迟的毫秒数 input）

max_iops
Maximum number of I/O requests per second that can be sustained. The I/O requests are randomly-distributed, database-block-sized reads.（持续中每秒请求最大i/o的数量 output）

max_mbps
Maximum throughput of I/O that can be sustained, expressed in megabytes per second. The I/O requests are randomly-distributed, 1 megabyte reads.（持续中最大的吞吐量M为单位）

actual_latency
Average latency of database-block-sized I/O requests at max_iops rate, expressed in milliseconds（平均延迟）