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Questions tagged [iostat]

iostat displays the current CPU load average and disk I/O information.

iostat (input/output statistics) is a computer system monitor tool used to collect and show operating system storage input and output statistics.

The iostat command is used for monitoring system input/output device loading by observing the time the devices are active in relation to their average transfer rates. The iostat command generates reports that can be used to change system configuration to better balance the input/output load between physical disks.

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Sun Solaris 10/11: get disk i/o rates in machine readable way

I need to get the I/O rates of the disks/drives on Sun Solaris 10 and 11. There is the command-line tool "iostat" which returns exactly what I need. But this output is formatted and not in a clean machine readable way. Beside this, I don't want to…
Semonit
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Piping iostat -d 1 to python sys.stdin

I am trying to pipe the output of utilities like iostat, mongostat, etc with the command: $ iostat -d 1 | ./script.py in which I am using the code: for line in sys.stdin: print line I see that it hangs and does not print each line to the…
Bob R
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Get r/s w/s using iostat -x and Unix commands

I am working on a system monitoring project and am wondering how to get just the Device, r/s, and w/s columns returned when running iostat -x. Im sure Id have to use cut some how but my attempt at getting the 4th column (r/s) here: iostat -x | cut…
coloradocoder
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Nfs Hanged suddenly not able to restart service

Nfs Hanged suddenly ! Not able to even restart service : # /etc/init.d/nfs-kernel-server restart * Stopping NFS kernel daemon [ OK ] * Unexporting…
Ashish Karpe
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understanding iostat %utilization

Used below to test the limit of what throughtput the disk can achieve dd if=/dev/zero of=test bs=4k count=25000 conv=fdatasync with multiple runs it averaged out to about 130 MB/s now when running cassandra on these system i am monitoring the disk…
anishek
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Iostat list non-existing block device xvdap1

Iostat output on my system: avg-cpu: %user %nice %system %iowait %steal %idle 0.13 0.02 0.42 0.32 0.10 99.01 Device: tps kB_read/s kB_wrtn/s kB_read kB_wrtn xvdap1 1.29 32.67 …
user4737714
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ioStat and Awk Output and Format with Megabyte and end of each field

Would it be possible to add a "Mb" to the end of just MB_r/s and MB_wn/s. Awk is getting 3 fields and reporting them during the test line to line like below: example: Format output below: ^ ^ …
Queasy
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Using AWK how can I total lines that match?

I'm trying to total the value of lines matching nvme* hhd from iostat in megabytes then awking to get total from line x to line z, in my case 2 lines. iostat -m <-- in megabytes iostat -m | awk '{if($1 ~ /nvme*/ ) print $2, $3,…
Queasy
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how about %util of iostat work in ssd or RAID arrays?

http://sebastien.godard.pagesperso-orange.fr/man_iostat.html this is iostat manual page, we can learn about: %util Percentage of CPU time during which I/O requests were issued to the device (bandwidth utilization for the device). Device saturation…
lyush
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Maximum value of kernel statistics - python

Question: What is the maximum value of kernel statistic counters and how can I handle it in python code? Context: I calculate some statistics based on kernel statistics (e.g. /proc/partitions - it'll be customized python iostat version). But I have…
Jan Garaj
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what does the "nice priority" mean about iostat command's %nice

I googled the iostat command's man manual about the %nice. In the explanation of the value of %nice there is a phrase about nice priority. I can not understand the meaning about it, can someone explain it? The complete comment in the man page is as…
andy
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Redirecting iostat output to a file

Why the output of iostat is not redirected to the file in the following command: iostat -x 3 | awk '/sda/ { print $11, $12}' > /tmp/disk_utilization Is iostat behaving differently than any other command? Thx in advance
isaac.hazan
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Options for systat (iostat/sar) in cygwin?

Going through cygwin's search, I cannot find linux sysstat apps (e.g., iostat or sar). Searching the web, I found some old messages of people unsuccessfully trying to compile sysstat from source on cygwin. Has anyone succeeded in adding sysstat apps…
boardrider
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Parsing iostat output

the output of iostat is like that: Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util sda 0.00 2.40 0.01 3.92 0.16 25.28 12.95 0.05 12.81 6.58 2.58 sda1 …
amprantino
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iostat & steal time

I am trying to catch some data from iostat output: # iostat -m avg-cpu: %user %nice %system %iowait %steal %idle 9.92 0.00 14.17 0.01 0.00 75.90 Device: tps MB_read/s MB_wrtn/s MB_read …
amprantino
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