Questions tagged [iotop]
11 questions
16
votes
2 answers
Error with command iotop on CentOS
When using sudo iotop (latest version 0.6-2.el7) in a terminal in my newly installed CentOS 7.5, I get the following error message:
Traceback (most recent call last):
File "/sbin/iotop", line 17, in
main()
File…
F. Privé
- 263
- 2
- 7
6
votes
3 answers
Why does a gunzip to dd pipeline slow down at the end?
my command:
gunzip -c serial2udp.image.gz |
sudo dd of=/dev/mmcblk0 conv=fsync,notrunc status=progress bs=4M
my output:
15930949632 bytes (16 GB, 15 GiB) copied, 1049 s, 15.2 MB/s
0+331128 records in
0+331128 records out
15931539456 bytes (16…
cts
- 81
- 1
- 5
5
votes
3 answers
Why are processes blocked by I/O in case of heavy system load?
I have a workstation(2x Intel Xeon family CPUs and 128GiB of RAM) running several virtual machines and while the combined CPU usage is <30%, then the load average is between 20 and 25. For example, if I execute a tar -xzvf vm_data.tgz --directory…
Martin
- 7,284
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2
votes
0 answers
Process shows as 100% I/O bound while producing minimal disk activity, disk util is at 100%
We are having quite strange problem. There is a program (cryptocurrency node to be precise) which has local database of all the transactions ever made. Database is huge - around 15 TB. The problem is that the program won't synchronize with the…
DimaA6_ABC
- 121
- 2
2
votes
1 answer
How to see an average of I/O of disk with iotop command?
With iotop -o command I can see the write and read speed of the disk per second. But it varies a lot, from 0 to high values. I'd like to see an average of it per minute or per 10 seconds.
How can I do it?
Henrique Barcelos
- 121
- 2
1
vote
1 answer
jbd2/sda2-8 utilizing disk I/O and Xorg.0.log log
I noticed that jbd2/sda2-8 is always using disk and iotop showing IO% between 1%-5%.
I checked the logs and noticed Xorg.0.log quite large. I see there are frequent connection and disconnection. Is there a way to reduce this.
[root@vmcloudm51…
supmethods
- 481
- 6
- 12
1
vote
2 answers
IOTOP complains: CONFIG_TASK_DELAY_ACCT not enabled in kernel
Looking about, I see that the standard fix is to add this to the kernel boot parameters.
Using systemd-boot, my arch.conf looks like this :
title Arch Linux
linux /vmlinuz-linux
initrd /intel-ucode.img
initrd /initramfs-linux.img
options…
Stephen Boston
- 1,928
- 3
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- 50
1
vote
1 answer
why is iotop showing "?err"
when I run iotop, the second column "PRIO" shows ?err everywhere.
What does this mean? I did not find any mention of err in the manual page.
I am using custom compiled kernel. Could it be some option is missing in my kernel? How do I find which…
400 the Cat
- 819
- 4
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- 85
0
votes
0 answers
Shared server resources limits per users
We have an on-prem Xeon server running Ubuntu LTS that is shared across few developers.
Each developer logs in with his on user and run various workloads on it.
The problem we experience is when sometime runs a CPU or storage extensive workload, the…
Mellowcandle
- 155
- 1
- 1
- 8
0
votes
1 answer
iotop fields on missing SWAPIN and IO columns on AlmaLinux 8
I am using iotop to monitor disk activity and on AlmaLinux 8 systems, iotop does not have all fields.
Here are the columns on AlmaLinux 8
PID PRIO USER DISK READ DISK WRITE> COMMAND
Here are the columns on CentOS 6/7
PID PRIO USER …
supmethods
- 481
- 6
- 12
-1
votes
1 answer
RAM bandwidth activity
I compile sources in /tmp mounted into RAM.
I'd like to know fast it is! That's show/monitor I/O activity (MB/s) for this device.
If I want to monitor HD bandwidth I would have used tools like iotop but for RAM it doesn't work!
Long story short:…
mattia.b89
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