iostat disk utilization

Cat 192.168.101.* | grep Load | awk ' {sum+=$4} END {print ' average= ', sum/nr} 'Cat 192.168.101.* | grep Memory | awk ' {sum+=$3} END {print ' average= ', sum/nr} 'Cat 192.168.101.* | grep Os-root | awk ' {sum+=$5} END {print ' average= ', sum/nr} 'Cat 192.168.101.* | grep Load | awk ' BEGIN {max = 0} {if ($4>max) max=$4 fi} END {print "max=", Max} 'Cat 192.168.101.* |grep Memory | awk ' BEGIN {max = 0} {if ($3>max) max=$3 fi} END {print "max=", Max} 'Cat 192.168.101.* |grep Os-root | awk ' BE

IOSTAT (view disk I/O) is used to monitor the I/O load of system devices. iostat displays statistics from the start of the system when it is running for the first time, after running iostat, the statistics after the command was last run are displayed. You can specify the number and time of statistics to obtain the requ

is 551.49. The volume is still relatively large. The-x parameter is used below for more statistical information The code is as follows: root@10.1.1.200:~# iostat-d-x-m 1 5 Linux 2.6.18-6-amd64 (192.168.2.31) 02/16/2016 _x86_64_ RRQM/S: How many of this device-related read requests per second are being merge. WRQM/S: How many write requests per second related to this device are being merge. RMB/S: Number of sectors read per second.

To view or monitor disk read and write performance in Linux, you can use the Iostat command, which is described in this section for its specific use. 1. HDD Read/write performance #查看TPS和吞吐量信息iostat-D-K 1 Device: TPs kb_read/s kb_wrtn/s kb_read kb_wrtnsda 14.54 417.21 368.06 15719357562 13867444535dm-0

There is a performance problem with the Linux system. In general, we can check the initial location problem by Top.iostat,vmstat and other commands. Among them, Iostat can provide us with rich IO status data.$ iostat-x-1AVG-CPU:%user%nice%system%iowait%steal%idle10.43 0.00 1.51 1.51 0.00 86.56device:rrqm/s wrqm/s r/s w/s rkb/s wkb/s avgrq-sz avgqu-sz await r_await w_await SVCTM%utilSDA 4477.00 9.00 951.00 1

Iostat is used to check the I/O performance of linux hard disks. recently, the company has installed several DELLPE2650 and 2850 Servers. the RHLE5.132-bit system is installed in a unified manner, while the SCSI hard disks of the servers are all RAID 1. The boss of the company asked for a unified detection report on hard disk I/O. he found many tools in Linux and found that

) usage status, by default, monitors all the hard disk devices, you can specify a device, such as-D SDA. ；-K Some columns using block are forced to use kilobytes units, the default unit block-M some columns that use block units Force MB, the default unit block[[emailprotected]app]#iostat-d-k13 #没1秒一次 Refresh 3 disk usage status linux3.10.0-514.el7.x86_64 (localh

Recently, the company has installed several DELLPE2650 and 2850 Servers. the RHLE5.132 system is installed in a unified manner, while the server's SCSI hard disks are all RAID 1. The boss of the company asked for a unified detection report on hard disk I/O. many tools were found in Linux, and iostat was the most practical tool. this... Recently, the company has installed several DELL PE2650 and 2850 Servers

Recently, the company has installed several DELL PE2650 and 2850 servers. The RHLE5.132 system is installed in a unified manner, while the server's SCSI hard disks are all RAID 1. The boss of the company asked for a unified detection report on hard disk I/O. He found many tools in Linux and found that iostat is the most practical. He needs to install sysstat first, that is, yum-y install sysstat; setting up

################ Operation################ Iostat-x 1 10Linux 2.6.18-92. el5xen 02/03/2009AVG-CPU: % USER % nice % System % iowait % steal % idle1.10 0.00 4.82 39.54 0.07 54.46Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-SZ avgqu-SZ await svctm % utilSDA 0.00 3.50 0.40 2.50 5.60 48.00 18.48 0.00 0.97 0.97 0.28SDB 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00SDC 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00SDD 0.00 0.00 0.00 0.00

Install iostat on centos # Yum install sysstat This parameter has never been used before. Now I have carefully studied iostat, because there is a high pressure on an important server, so let's take a look at it. below is the server with too much Io pressure. $iostat -x 1Linux 2.6.33-fukai (fukai-laptop) _i686_ (2 CPU)avg-cpu: %user %nice %system %

The Iostat in a Linux system is an abbreviation for I/O statistics (input/output statistics), and the Iostat tool willMonitor the disk operation activity. It is characterized by the reporting of disk activity statistics, as well as the reporting of CPU usage. WithVmstat, Iostat