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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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gfortran open error messages

I seem to remember the open in gfortran has the possibility to return the result of iostat as a string, but I have forgotten the option name to return the string. Does anybody remember the parameter to use?
Zeus
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How to check disk read or write utilization

I want to know disk read / write utilization especially, only read or write utilization or write utilization I tried using iostat but it shows entire utilization, How to check only disk read or only write utilization (The progress is consist of…
Jong Hyeok Park
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IOSTAT report doesn't match with DD benchmark

I am running a DD benchmark but the obtained results are not matching with the IOSTAT values. This is the DD sample: $ sudo dd bs=4096 count=690 if=/dev/zero of=/mnt/tmp/test oflag=dsync 690+0 records in 690+0 records out 2826240 bytes (2,8 MB)…
Gustavo Portela
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HP UX iostat on File System

I have a server running HP UX 11 OS and i'm trying to have I/O statistics for File System (not disk). Fo example , I have 50 disk attached to the server when I type iostat (here under output of iostat for 3 disks) : disk9 508 31.4 1.0 disk10…
ced
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grep -v and -B|-A|-C not working together

I need to scan the output of iostat -En on a Solaris machine such that when a disk with errors is found, two lines about that disk are sent to the final output. This works fine so far using iostat -En | grep 'Errors: [1-9]' -A 1 but when I try to…
jamesbtate
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filter output of vmstat and iostat

I am gathering statistics data using iostat and vmstat and am running each one for 10 seconds regularly. However, I don't want to print out the whole output. For iostat I want to only show the number of reads and writes and display them as a column.…
paul
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Get current disk load

Since I can't use watch on iostat -dx 1 to get the current disk load, I'd like to know if there is an alternative way to do this, e.g., doing calculations with the values contained in /proc/diskstats and/or some other files.
Jay
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Where do these disk reads come from?

I've written an application that heartbeats using single-block writes to disk using O_WRONLY|O_SYNC|O_DIRECT. Is there something I need to do to disable the buffer cache for this device? During testing there are no readers. I can simulate it as…
Chip Christian
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IS_IOSTAT_END error in Mac OSX (Fortran)

I am writing a code in Fortran to read a list of properties from a file, and am using the IOSTAT function to skip invalid data. The relevant section of code is as follows: do j=1,1000 read(22,*,IOSTAT=ios) step,T,K,U,Tot,P If(IS_IOSTAT_END(ios))…
user3528956
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How do I get the output of iostat as a graph in Solaris 9

Is there a built-in/custom script available?
Vish
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/proc/diskstat numbers don't sum up correctly

I'm writing a routine to report metrics using /proc/diskstat, which reports data for disk activity. The numbers are NOT adding up. Example: [esm@graphdb301p:lib]$ cat /proc/diskstats 1 0 ram0 0 0 0 0 0 0 0 0 0 0 0 ... 1 15 ram15 0 0 0 0…
Kevin J. Rice
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System Wide I/O Statistics

In earlier versions of "vmstat", the device minor version was used to determine whether it was a partition or a disk (0 => disk and >0 => partition)). Am I not correct? Then, from kernel version 2.6.x some metrics were measured only at the…
themoondothshine
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Machine data not displaying output every 15 Seconds

The following script is meant to output "vmstat" for example every 15 seconds, but for some reason it only does this if there's activity or when I kill the script, in other cases it just sits there. #!/bin/bash #!/bin/sh ps -ef | grep -v grep |…
I AM L
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Where's solaris 11 's pkg install package downloaded path?

I use pkg install gcc-3 in solaris 11 to install gcc 3. Where did pkg store the downloaded package install files / gcc-3.pkg file? I tried /etc/pkg/, only get some useless mako file there. I can see the pkg thread downloading the file, is there any…
pinkdawn
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iostat vs /proc/diskstats

I want to monitor the io performance of a linux system, particularly the read performance. The iostat command gives await and svctim for both reads and writes combined which is not suitable for me. The file /proc/diskstats gives in column 1 the # of…
user1393650
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