监控ASM磁盘组IO吞吐量

In this Document

APPLIES TO:

Oracle Database - Enterprise Edition - Version 10.1.0.3 to 11.1.0.7 [Release 10.1 to 11.1]
Information in this document applies to any platform.
***Checked for relevance on 27-Feb-2011***

PURPOSE

The OS command iostat is normally used to monitoring system input/output device load. This script will provide similar information like iostat but specific for the ASM disks.
For details about iostat (ie cumulative or not, and so on) please refer to the man of iostat.

REQUIREMENTS

We use v$asm_disk_stat instead of v$asm_disk because the information is exactly the same.
The only difference is v$asm_disk_stat is the information available in memory while v$asm_disk access the disks to re-collect some information. Since the information required doesn't require to "re-collect" it from the disks, v$asm_disk_stat is more appropriate here.

On Solaris, please use :
- the /usr/wpg4/bin/grep utility instead of /usr/bin/grep to avoid the following error:
"grep: illegal option -- q"

- the /usr/wpg4/bin/awk utility instead of /usr/bin/awk to avoid the following error:
"awk: syntax error near line 48"

On other platforms, it could sometime fail due to Shell compatibility issues.

In such case, retry using another Shell (ie: Bash instead of Ksh)

We do not guarantee that it will work for you, so be sure to test it in your environment before relying on it. This script is provided as an example. If it doesn't work, you must adapt it by yourself for your platform

In 10.1 asmcmd utility is not included:
asmcmd can be used against ASM versions 10gR1 (10.1.0.n) and 10gR2 (10.2.0.n). In ASM version 10.2 asmcmd is provided by default ASM installation.
To use asmcmd in ASM version 10.1 environment we can just copy relevant files from 10.2 installation into the 10.1

CONFIGURING

Not required.

INSTRUCTIONS

Not required

CAUTION

This sample code is provided for educational purposes only and not supported by Oracle Support Services. It has been tested internally, however, and works as documented. We do not guarantee that it will work for you, so be sure to test it in your environment before relying on it.

Proofread this sample code before using it! Due to the differences in the way text editors, e-mail packages and operating systems handle text formatting (spaces, tabs and carriage returns), this sample code may not be in an executable state when you first receive it. Check over the sample code to ensure that errors of this type are corrected.

SAMPLE OUTPUT

For every ASM disk, this is the output provided:

  DiskPath    - Path to ASM disk  
 
DiskName    - ASM disk name  
 
Gr          - ASM disk group number  
 
Dsk        - ASM disk number  
 
Reads      - Reads  
 
Writes      - Writes  
 
AvRdTm      - Average read time (in msec)  
 
AvWrTm      - Average write time (in msec)  
 
KBRd        - Kilobytes read  
 
KBWr        - Kilobytes written  
 
AvRdSz      - Average read size (in bytes)  
 
AvWrSz      - Average write size (in bytes)  
 
RdEr        - Read errors  
 
WrEr        - Write errors

Script Output

DiskPath - DiskName Gr Dsk Reads Writes AvRdTm AvWrTm KBRd KBWr AvRdSz AvWrSz RdEr WrEr
/dev/asmdisk14 - DATA_0000 2 0 0 4 0.0 5.0 0 16 0 4096 0 0
/dev/asmdisk4 - DATA_0001 2 1 10 0 17.0 0.0 0 0 0 0 0 0
/dev/asmdisk17 - DATA_0002 2 2 0 1 0.0 0.0 0 0 0 512 0 0
/dev/asmdisk5 - DATA_0003 2 3 0 0 0.0 0.0 0 0 0 0 0 0
/dev/asmdisk16 - DATA_0004 2 4 3 3 6.7 3.3 0 0 0 0 0 0
/dev/asmdisk23 - DATA_0005 2 5 0 0 0.0 0.0 0 0 0 0 0 0

The asmiostat.txt output file can be used for .csv and graphical representation by using Doc 1373682.1

到Linux公社资源站下载asmiostat.zip工具。：

------------------------------------------分割线------------------------------------------

具体下载目录在 /2016年资料/4月/10日/监控ASM磁盘组IO吞吐量/

------------------------------------------分割线------------------------------------------

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--