二.11gR2使用asmcmd工具下的iostat命令。
1.ASMCMD工具iostat命令。
ASMCMD [+] > help iostat
iostat
Displays I/O statistics for Oracle ASM disks in mounted disk groups.
iostat [-et][--io] [--suppressheader] [--region] [-G diskgroup] [interval]
iostat lists disk group statistics using the V$ASM_DISK_IOSTAT view.
The options for the iostat command are described below.
-e - Displays error statistics (Read_Err, Write_Err).
-G diskgroup - Displays statistics for the disk group name.
--suppressheader - Suppresses column headings.
--io - Displays information in number of I/Os, instead
of bytes.
-t - Displays time statistics (Read_Time, Write_Time).
--region - Displays information for cold and hot disk regions
(Cold_Reads, Cold_Writes, Hot_Reads, Hot_Writes).
interval - Refreshes the statistics display based on the
interval value (seconds).
The attribute descriptions for iostat command output are described
below. To view the complete set of statistics for a disk group,
use the V$ASM_DISK_IOSTAT view.
Group_Name Name of the disk group.
Dsk_Name Name of the disk.
Reads Total number of bytes read from the disk.
If the --io option is entered, then the value
is displayed as number of I/Os.
Writes Total number of bytes written from the disk.
If the --io option is entered, then the value
is displayed as number of I/Os.
Cold_Reads Total number of bytes read from the cold disk
region. If the --io option is entered, then
the value is displayed as number of I/Os.
Cold_Writes Total number of bytes written from the cold
disk region. If the --io option is entered,
then the value is displayed as number of I/Os.
Hot_Reads Total number of bytes read from the hot
disk region. If the --io option is entered,
then the value is displayed as number of I/Os.
Hot_Writes Total number of bytes written from the hot disk
region. If the --io option is entered, then the
value is displayed as number of I/Os.
Read_Err Total number of failed I/O read requests for
the disk.
Write_Err Total number of failed I/O write requests for
the disk.
Read_Time Total I/O time (in hundredths of a second) for
read requests for the disk if the
TIMED_STATISTICS initialization parameter is
set to TRUE (0 if set to FALSE).
Write_Time Total I/O time (in hundredths of a second) for
write requests for the disk if the
TIMED_STATISTICS initialization parameter is
set to TRUE (0 if set to FALSE).
The following are examples of the iostat command. The first example
displays disk I/O statistics for the data disk group in total number
of bytes. The second example displays disk I/O statistics for the data
disk group in total number of I/O operations.
2.执行下面的命令，5秒钟显示一次data磁盘组的IO吞吐量，Reads，Writes单位是bytes。
ASMCMD [+] > iostat -G data 5
Group_Name Dsk_Name Reads Writes
DATA DISK1 233472 6602752
DATA DISK2 32768 8192
Group_Name Dsk_Name Reads Writes
DATA DISK1 0.00 1638.40
DATA DISK2 0.00 0.00
Group_Name Dsk_Name Reads Writes
DATA DISK1 0.00 819.20
DATA DISK2 0.00 0.00
Group_Name Dsk_Name Reads Writes
DATA DISK1 0.00 1638.40
DATA DISK2 0.00 0.00
Group_Name Dsk_Name Reads Writes
DATA DISK1 0.00 1638.40
DATA DISK2 0.00 0.00
Group_Name Dsk_Name Reads Writes
DATA DISK1 0.00 819.20
DATA DISK2 0.00 0.00
--end--
Oracle 10g 手工创建ASM数据库