** Tags added: cscc
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Title:
kswapd0 100% cpu usage
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Ubuntu is customizable from the moment you install it. The latest
version uses the GNOME desktop environment which allows you to
personalize virtually every single element of your UI/UX, from your
notification sounds, popup style, fonts, system animations, and
workspaces.
** This bug is no longer a duplicate of bug 1518457
kswapd0 100% CPU usage
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kswapd0 100% cpu usage
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*** This bug is a duplicate of bug 1518457 ***
https://bugs.launchpad.net/bugs/1518457
** This bug has been marked a duplicate of bug 1518457
kswapd0 100% CPU usage
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This version is now outdated and no more supported
** Changed in: linux (Ubuntu)
Status: Incomplete => Invalid
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Title:
kswapd0 100% cpu
Solution checked in Ubuntu 14.04.1
Use vm.swappiness vm.vfs_cache_pressure to the minimum possible
Run the below command in Terminal
sudo gedit /etc/sysctl.conf
Add the below line at the end of the file. Select File Save. Select File
Quit. Restart computer
vm.swappiness=1
Saravanan S PAJANCOA, thank you for your comment. So your problem and hardware
may be tracked, could you please file a new report with Ubuntu by executing the
following in a terminal while booted into the default Ubuntu kernel (not a
mainline one) via:
ubuntu-bug linux
For more on this, please
I see this on Ubuntu 14.04, kernel 3.14.1-031401-generic #201404141220 ...
kswapd0 decides to eat 100% CPU for up to 20 min at a time, for no reason that
I can see
Why is this bug Low importance? It's important to me that my CPU isn't
unavailable due to a bug!
Hardware: ASUS CHROMEBOX-M004U
Tim Carr, thank you for your comment. Unfortunately, this bug report is not
scoped to you, or your problem. So your hardware and problem may be tracked,
could you please file a new report with Ubuntu by executing the following in a
terminal while booted into the default Ubuntu kernel (not a
% grep /proc/[0-9]*/comm
% cat $(dirname $(grep kswapd /proc/[0-9]*/comm))/wchan; echo
Do this when irrational CPU usage occurs. Show wchan. If
contention_wait, there's a fix. Anyway wchan is helpful.
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Hi there, I have the same problem (as described above) on Ubuntu 14.04
LTS running on Rackspace cloud servers.
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Title:
kswapd0 100% cpu usage
Matthew Marinovich, thank you for your comment. So your hardware and problem
may be tracked, could you please file a new report with Ubuntu by executing the
following in a terminal while booted into the default Ubuntu kernel (not a
mainline one) via:
ubuntu-bug linux
For more on this, please
Same here.
Ubuntu 14.04, kernel 3.13.0-24-generic , HP ProLiant MicroServer , AMD
Athlon(tm) II Neo N36L processor, 8G RAM
I use it as a media server, so it handle large (1+ G) files. kswapd0 uses 100%
CPU after 5-6 days.
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János Milus, thank you for your comment. So your hardware and problem may be
tracked, could you please file a new report with Ubuntu by executing the
following in a terminal while booted into a Ubuntu repository kernel (not a
mainline one) via:
ubuntu-bug linux
For more on this, please read
same here running under hyper-v
my situation is as described above multiple times.
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Title:
kswapd0 100% cpu usage
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syadnom, thank you for your comment. So your hardware and problem may be
tracked, could you please file a new report with Ubuntu by executing the
following in a terminal while booted into a Ubuntu repository kernel (not a
mainline one) via:
ubuntu-bug linux
For more on this, please read the
I've been seeing this issue for almost a year now on an Asus Ultrabook
(Core i5, 4GB RAM, SSD). I installed and ran 13.04 until two weeks ago,
when I in-place upgraded to 13.10 (not a re-install). I've been seeing
kswapd go crazy anywhere between weekly and daily, inevitably forcing a
reboot
Michael-tutty, thank you for your comment. So your hardware and problem may be
tracked, could you please file a new report with Ubuntu by executing the
following in a terminal while booted into a Ubuntu repository kernel (not a
mainline one) via:
ubuntu-bug linux
For more on this, please read
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux (Ubuntu)
Status: New = Confirmed
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Title:
** Project changed: linux = linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: New = Incomplete
** Changed in: linux (Ubuntu)
Importance: Undecided = Low
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Since Ubuntu 13.10 update, I have high cpu loads which eventually (after
5-10sec) lead to a blocked system.
Same reason: kswapd0 uses lots of CPU. Also seems mostly in conjunction with
Chrome when having many open tabs. Freeing memory by closing Chrome (or
another heavy app) in time before the
Bachi, thank you for your comment. So your hardware and problem may be tracked,
could you please file a new report with Ubuntu by executing the following in a
terminal while booted into a Ubuntu repository kernel (not a mainline one) via:
ubuntu-bug linux
For more on this, please read the
Running fresh Ubuntu 13.10 on a new Macbook Air, I'm facing this
problem.
My user home is encrypted, maybe it is related?! When I open too many
sites with Firefox, kswapd0 goes crazy, with Google Chrome, it does
not happen that much.
BTW, this problem persist since middle of 2011 ???
Should I
Thiago Martins, if you have a bug in Ubuntu, the Ubuntu Kernel team, Ubuntu Bug
Control team, and Ubuntu Bug Squad would like you to please file a new report
by executing the following in a terminal while booted into a Ubuntu repository
kernel (not a mainline one) via:
ubuntu-bug linux
For
The problem is still affecting me. I have no swap partition but at some
times computer starts lagging and disk start working as hell. top
command tells me chromium and kswapd usage is very high.
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marco, if you have a bug in Ubuntu, the Ubuntu Kernel team, Ubuntu Bug Control
team, and Ubuntu Bug Squad would like you to please file a new report by
executing the following in a terminal while booted into a Ubuntu repository
kernel (not a mainline one) via:
ubuntu-bug linux
For more on
I submitted a new report here
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1185172 also i
subscribed you penalvch .
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Title:
kswapd0 100%
I forgot that my swap is disabled now, but this was happening with the
swap on too, let me know if you need this checked...
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Title:
kswapd0 100%
This happens pretty often on my system too (4Gb ram dual core, SSD)
especially when running some java application together with thunderbird.
(Anyway thunderbird slowness is another story..) but for example now i
have the android emulator and android studio and as soon as I run
thunderbird - the
correction: enabling swap seems to fix this issue.
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kswapd0 100% cpu usage
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dimovnike, have you tried maxing out the swap usage then? For me, the
problem occurs again if swap is also full.
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Title:
kswapd0 100% cpu usage
dimovnike / Ahmad Syukri Abdollah, if you have a bug in Ubuntu, the Ubuntu
Kernel team, Ubuntu Bug Control team, and Ubuntu Bug Squad would like you to
please file a new report by executing the following in a terminal:
ubuntu-bug linux
For more on this, please see the Ubuntu Kernel team
I think is on pack zramswap
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Title:
kswapd0 100% cpu usage
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josimar Amilcar, jafa, if you have a bug in Ubuntu, could you please file a new
report by executing the following in a terminal:
ubuntu-bug linux
For more on this, please see the Ubuntu Kernel team article:
https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies#Filing_Kernel_Bug_reports
the
Arkadiy Kulev, thank you for taking the time to report this bug and helping to
make Ubuntu better. Please execute the following command, as it will
automatically gather debugging information, in a terminal:
apport-collect 721896
When reporting bugs in the future please use apport by using
I'm sorry Christopher, I downgraded to Debian Stable on my production
servers and not experiencing any more problems.
2012/10/17 Christopher M. Penalver christopher.penal...@gmx.com
Arkadiy Kulev, thank you for taking the time to report this bug and
helping to make Ubuntu better. Please
A comment on the fedora bug
(https://bugzilla.redhat.com/show_bug.cgi?id=712019) mentions that this
occurs when a large file (2G) is in cache. I just started experiencing
this bug while working with large files, so this may be something to
look into.
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I'm seeing this on Precise with a computer that has weeks of uptime
between reboots. 50% wa in top (one of two cores), 100% kswapd0 in iotop
(no read of write throughput reported). This keeps happening with some
200-300 of MB free memory as reported by free -m (but significant swap
use, so total
** Changed in: linux (Ubuntu)
Importance: Undecided = Medium
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Set package to linux due to similarity with bug #484045 and red hat bug:
https://bugzilla.redhat.com/show_bug.cgi?id=712019
Not marking as duplicate due to kernel bugs policy
** Bug watch added: Red Hat Bugzilla #712019
https://bugzilla.redhat.com/show_bug.cgi?id=712019
** Package changed:
Although this bug is reported on LTS 10.04, I've to report that the bug
still exists in kernel 3.1 (I'm on Debian though)! Even with swap turned
off, the system still hangs as soon as there is insufficient memory.
Stranger thing is, in iotop, it lists kswapd0 as having the most I/O%
(i.e. highest
Reply #21 (https://bugs.launchpad.net/ubuntu/+bug/721896/comments/21)
[quote]
I just thought I would shed some light on this issue. kswapd0 has nothing to do
with swap space or memory. kwapd0 is the kernel process which swaps tasks. A
task is any thing that has a PID (which includes threads).
I don't know what's causing the issue but you're chasing a ghost if
you're trying to tune your swap/memory environment.
I don't think so - as I can see, when this happens to me, kernel copies
(whats interesting it realy copies, not moving ) content of ram to swap
( without any reason, even when
I can confirm. This also affects Ubuntu Linux 10.04.3 kernel: 2.6.32-34-server
#77-Ubuntu SMP. The symptoms are the same.
When applications are using only swap the disk start working like crazy. Also
everything that works on the machine slows down thereby. Even simple tasks like
ls take 20
Thanks @Follow-Me and @Anthony, the hint with the kernel update really
seems to work. :-) I didn't know this was even possible in such an easy
manner with an active 10.04 installation.
Inspired by Anthony's descriptions, I found out yesterday that even the
Lucid-Updates repository[1] features
** Changed in: ubuntu
Status: New = Confirmed
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On a 10.04 LTS machine running 2.6.32-32-generic SMP, 32 bit. I have a
80 gig intel SSD as the system drive and a 1 terabyte samsung as storage
drive. It runs Windows XP VirtualBox instance all the time off the SSD.
It runs ZoneMinder for 4 cameras and writes to the 1 terabyte drive. So
it's
Yes, I also noticed that running a virtual machine in VirtualBox is
almost guaranteed to start this issue immediately – apart from the
sporadic occurrences when having the system with Firefox and Thunderbird
run for several days and doing hibernate/resume over night.
Anthony, is this the PPA you
I used the command sudo add-apt-repository ppa:kernel-ppa/ppa to
access the kernel packages. I believe this places the line deb
http://ppa.launchpad.net/kernel-ppa/ppa/ubuntu lucid main in a sources
list file, and adds the key. After running sudo apt-get update I could
install the 2.6.38-10
I'm not sure I have the same issue as it occur only after resume.
I got a totally insane load average but no CPU load at all. One ore 2
minutes after resume my system become non responsible. I see the HD led
continuously on but I don't know why.
Sometime, after 10mn the disk activity go down
This issue is appear to be gone in 2.6.39.2
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I just thought I would shed some light on this issue. kswapd0 has
nothing to do with swap space or memory. kwapd0 is the kernel process
which swaps tasks. A task is any thing that has a PID (which includes
threads). When kswapd0 is high, it means the kernel is spending more
time context
** Tags added: lucid
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User Unknown, thanks for clarifying (in post #18). I have the same
issue as you and have also been wondering exactly what 100% CPU usage
means. My case is just like yours - kswapd will take over and swap like
mad even when physical memory is only half full. (swappiness setting
doesn't seem to
As for me swap is on, a lot of free memory (~30-40% of 4G ) - but
kswapd0 swapping like insane - swapped space = users RAM size
spapping policy - /proc/sys/vm/swappiness = 7
Why it does that?
Tested (affected) kernels: 2.6.35 , 2.6.36, 2.6.37 ,2.6.37-zen , 2.6.38,
2.6.38-zen
** Tags added:
I've facing this issue on a regular basis - 2-3 times a week for a last
year. This bug was in 10.04, now it is in 10.10 . I've tried tried to
update kernel, build my own from vanila source, build form zen sources -
every time the same result. As for me, this issue usualy happens after
** Also affects: centos
Importance: Undecided
Status: New
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Nobody cares about this issue, a lot of duplicationg and tickets for
other distribudion.
https://bugs.launchpad.net/ubuntu/+bug/484045 (same issue, Unassigned, Expired)
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/689262 (looks like the
same issue, Unassigned)
I think what we really need to clarify is what we all mean by
kswapd0 using/causing 100% CPU. Reading through some of the posts here I
get the feeling that some of us (even me) might not really be talking about
the same thing as some of the others, and therefore might indeed have a
similar but
I get this bug too on my HP Pavilion DV6 laptop. For me it only ever
happens after a suspend to ram, and the symptoms are the same. My
physical ram is 50% full, but the swap space just fills up and churns
the hard disc forever. The system becomes barely usable (mouse pointer
even sticks for long
Hmm, just a thought, but what processes if any get triggered after a
suspend-to-ram is restored? I just noticed that after running sudo
swapoff -a, I now have dpkg running in a background process. Could it
actually be a bug in dpkg, meaning that some people always see it after
a suspend to ram but
Hmm, is it when automatic security updates are pushed out. It may be a
coincidence. Can anyone else confirm if they see this pattern?
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Graham, after testing this by leaving my machine running for several
days, I could confirm that it seems not to be directly related to
suspend-to-ram. However, I got the feeling that after suspend-to-ram it
seems more likely to occur sooner. As an example: with my machine
running continuously for
Oh, I will, of course, have an eye on dpkg and related processes once
this happens again. So far, it has not happened for 3 or 4 days on my
machine (knock on wood), but I also rebooted twice recently, due to the
kernel updates.
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** Package changed: ubuntu = swapd (Ubuntu)
** Package changed: swapd (Ubuntu) = ubuntu
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Hello Arkadiy,
have you posted this issue somewhere else and gotten a response there?
For the last two days, this kswapd0 related I/O Wait bussiness has
really been constantly p***ing me off, even though no swap space was
even mounted. And in this bug report it seems like two people don't make
No, this is the only place, and basically it's the only one it should be.
The fast solution for now is just reboot the server every week or so.
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I can now confirm that the issue seems unrelated to suspending/resuming.
After a continuous uptime of more than 90 hours, my machine just ran
into this issue again -- not for the first time within these 90 hours,
but for the first time with all previous symptoms and without getting
back to normal
Dammit! And here is the attached log I announced...
** Attachment added: Output of 'top -i' in an interval of about 11 seconds,
showing kswapd0 idle process and high I/O Wait
https://bugs.launchpad.net/ubuntu/+bug/721896/+attachment/1872267/+files/top-monitor.txt
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Oh dear... please ignore previous attachment. (Mods, please delete if
possible!)
Here is the correct file. Good night!
** Attachment added: [Log] Output of 'top -i' in an interval of about 11
seconds, showing kswapd0 idle process and high I/O Wait
Oh, thank Dog, I'm not the only one with this issue.
I had explained that issue at length in the Ubuntu forums, but never got
any reply: http://ubuntuforums.org/showthread.php?t=1681368
I, too, noticed this behavior ever since mid-January, I think. for the
first weeks, whenever this issue
Please click this bug affects me on top of the report, so the support
could see this faster.
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Yeah, just did that. Sorry, hadn't seen that function before.
Arkadiy, do you suspend-to-RAM your server, as well? For me, this issue
never happened before the first suspend/resume after a full reboot.
Might be a coincidence, though, as I barely ever reboot my machine, but
suspend it to RAM
We might have different issues here, I am not getting into swap (my swap is
constant at 62 megabytes use).
It's the kswapd0 that is eating up 100% cpu on one of my cores (I have 4, so
it's not a big deal for me).
I don't suspend the server, it's up 24/7. It's just that after some time
running,
When kswapd0 starts going berserk on my machine, my swap is usually not
or barely in use (0 or a few kiB of the 3GB). However, once kswapd0 is
given some time to be wicked, it will fill up the swap considerately to
a point (normally not full but a little over half full, I think; last
night it was
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