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Old 09-04-2010, 05:21 PM
Nick Fenger
 
Default Swap filling up, apps crashing

Hello,
I'm having an issue where swap fills to 100% (0Kb free) after running�applications�such as openoffice and chrome/firefox but does not decrease substantially when the applications are closed. Ultimately when swap reaches 100%, browser plugins start crashing (java, flash).�


The configuration is a mostly out-of-the-box fat-clients (32Bit 3.2Ghz 512MB intel video systems) with a Ubuntu 10.04 Lucid image I built with the --fat-client option of ltsp-build-client on a 64Bit Server. I've made no customizations is Lts.conf.

Thank you for your support,
dmesg of a firefox crash:
[ �791.900521] 67650 total pagecache pages[ �791.900523] 3714 pages in swap cache[ �791.900526] Swap cache stats: add 45890, delete 42176, find 2827/4388

[ �791.900529] Free swap �= 20kB[ �791.900531] Total swap = 124688kB[ �791.902305] 128768 pages RAM[ �791.902308] 0 pages HighMem[ �791.902310] 4080 pages reserved

[ �791.902313] 98904 pages shared[ �791.902315] 86898 pages non-shared[ �791.902319] Out of memory: kill process 2105 (run-mozilla.sh) score 95346 or a child[ �791.902325] Killed process 2122 (firefox-bin)

[ �791.912197] firefox-bin invoked oom-killer: gfp_mask=0x200da, order=0, oom_adj=0[ �791.912203] firefox-bin cpuset=/ mems_allowed=0[ �791.912208] Pid: 2133, comm: firefox-bin Not tainted 2.6.32-24-generic #42-Ubuntu


dmesg of Java crash (in chrome)
[ 4227.264993] Swap cache stats: add 87890, delete 87714, find 9497/15136

[ 4227.264996] Free swap �= 0kB[ 4227.264999] Total swap = 124632kB[ 4227.267225] 128768 pages RAM

[ 4227.267230] 0 pages HighMem[ 4227.267232] 4131 pages reserved[ 4227.267235] 100756 pages shared

[ 4227.267238] 94391 pages non-shared[ 4227.267244] Out of memory: kill process 2609 (chromium-browse) score 987621376 or a child

[ 4227.267250] Killed process 2619 (java)[ 4333.230684] chromium-browse invoked oom-killer: gfp_mask=0x280da, order=0, oom_adj=10

[ 4333.230692] chromium-browse cpuset=/ mems_allowed=0[ 4333.230698] Pid: 2705, comm: chromium-browse Not tainted 2.6.32-24-generic #42-Ubuntu

--�Nick Fenger
-Information Technology

Trillium Charter School
5420 N. Interstate Ave
Portland, OR 97217


(503) 285-3833
http://www.trilliumcharterschool.org
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Old 09-04-2010, 05:34 PM
"Jonathan Carter (highvoltage)"
 
Default Swap filling up, apps crashing

Hi Nick

On 04/09/2010 13:21, Nick Fenger wrote:
> I'm having an issue where swap fills to 100% (0Kb free) after
> running applications such as openoffice and chrome/firefox but does not
> decrease substantially when the applications are closed. Ultimately when
> swap reaches 100%, browser plugins start crashing (java, flash).
>
> The configuration is a mostly out-of-the-box fat-clients (32Bit 3.2Ghz
> 512MB intel video systems) with a Ubuntu 10.04 Lucid image I built with
> the --fat-client option of ltsp-build-client on a 64Bit Server. I've
> made no customizations is Lts.conf.
> Thank you for your support,

In my initial tests with diskless fat clients, I also ran into some
memory problems on a 512MB machine. Disabling certain things that run on
startup (most notable jockey-gtk and italc) reduced the memory usage
quite a bit and made it possible to log in and use the machine much better.

It doesn't quite sound like you have the same issue that I had, but
perhaps even removing some of these session startup programs might fix
yours as well.

-Jonathan

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Old 09-04-2010, 05:47 PM
Nick Fenger
 
Default Swap filling up, apps crashing

Jonathan,


I also ran into some*memory problems on a 512MB machine. Disabling certain things that run on*startup (most notable jockey-gtk and italc) reduced the memory usage
I am impressed that these machines run very well for 10-20 minutes, I can browse the web and run flash and java sites & openoffice*simultaneously, however,*swap inches up and things start crashing. A reboot is the only way to clear the swap back to 0.


I do expect that with only 512MB of ram I will need remove anything extra - thanks for the suggestions. This appears to be more like a memory leak, however, I'm wondering if it's related to the lucid x memory leaks found during beta testing. I can't seem to find what's hogging the swap memory?


Thanks,
-Nick

On Sat, Sep 4, 2010 at 10:34 AM, Jonathan Carter (highvoltage) <jonathan@ubuntu.com> wrote:


Hi Nick



On 04/09/2010 13:21, Nick Fenger wrote:

> I'm having an issue where swap fills to 100% (0Kb free) after

> running applications such as openoffice and chrome/firefox but does not

> decrease substantially when the applications are closed. Ultimately when

> swap reaches 100%, browser plugins start crashing (java, flash).

>

> The configuration is a mostly out-of-the-box fat-clients (32Bit 3.2Ghz

> 512MB intel video systems) with a Ubuntu 10.04 Lucid image I built with

> the --fat-client option of ltsp-build-client on a 64Bit Server. I've

> made no customizations is Lts.conf.

> Thank you for your support,



In my initial tests with diskless fat clients, I also ran into some

memory problems on a 512MB machine. Disabling certain things that run on

startup (most notable jockey-gtk and italc) reduced the memory usage

quite a bit and made it possible to log in and use the machine much better.



It doesn't quite sound like you have the same issue that I had, but

perhaps even removing some of these session startup programs might fix

yours as well.



-Jonathan



--
Nick Fenger
-Information Technology
-6th Grade Outdoor School
-Trillium Board Member - Communication Committee

Trillium Charter School
5420 N. Interstate Ave


Portland, OR 97217
(503) 285-3833
http://www.trilliumcharterschool.org

"If there is no struggle, there is no progress. Those who profess to favor freedom, and yet depreciate agitation, are men who want crops without plowing up the ground. They want rain without thunder and lightning. They want the ocean without the awful roar of its many waters. This struggle may be a moral one; or it may be a physical one; or it may be both moral and physical; but it must be a struggle."*


—*Frederick Douglass




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Old 09-06-2010, 08:43 PM
Nick Fenger
 
Default Swap filling up, apps crashing

here's an update on my memory issues:
I switched to a thin client with local apps setup. Now 512M is plenty of memory for chrome as a local app if everything else runs from the ltsp server. I was using fat clients because of network slowness. Looks like fixing flow control is going to help my network actually use the gigabit port in the server. �https://help.ubuntu.com/community/UbuntuLTSP/FlowControl


On Sat, Sep 4, 2010 at 10:47 AM, Nick Fenger <nick@trilliumcharterschool.org> wrote:


Jonathan,



I also ran into some�memory problems on a 512MB machine. Disabling certain things that run on�startup (most notable jockey-gtk and italc) reduced the memory usage
I am impressed that these machines run very well for 10-20 minutes, I can browse the web and run flash and java sites & openoffice�simultaneously, however,�swap inches up and things start crashing. A reboot is the only way to clear the swap back to 0.



I do expect that with only 512MB of ram I will need remove anything extra - thanks for the suggestions. This appears to be more like a memory leak, however, I'm wondering if it's related to the lucid x memory leaks found during beta testing. I can't seem to find what's hogging the swap memory?



Thanks,
-Nick

On Sat, Sep 4, 2010 at 10:34 AM, Jonathan Carter (highvoltage) <jonathan@ubuntu.com> wrote:



Hi Nick



On 04/09/2010 13:21, Nick Fenger wrote:

> I'm having an issue where swap fills to 100% (0Kb free) after

> running applications such as openoffice and chrome/firefox but does not

> decrease substantially when the applications are closed. Ultimately when

> swap reaches 100%, browser plugins start crashing (java, flash).

>

> The configuration is a mostly out-of-the-box fat-clients (32Bit 3.2Ghz

> 512MB intel video systems) with a Ubuntu 10.04 Lucid image I built with

> the --fat-client option of ltsp-build-client on a 64Bit Server. I've

> made no customizations is Lts.conf.

> Thank you for your support,



In my initial tests with diskless fat clients, I also ran into some

memory problems on a 512MB machine. Disabling certain things that run on

startup (most notable jockey-gtk and italc) reduced the memory usage

quite a bit and made it possible to log in and use the machine much better.



It doesn't quite sound like you have the same issue that I had, but

perhaps even removing some of these session startup programs might fix

yours as well.



-Jonathan



--
Nick Fenger
-Information Technology
-6th Grade Outdoor School
-Trillium Board Member - Communication Committee



Trillium Charter School
5420 N. Interstate Ave

Portland, OR 97217
(503) 285-3833
http://www.trilliumcharterschool.org

"If there is no struggle, there is no progress. Those who profess to favor freedom, and yet depreciate agitation, are men who want crops without plowing up the ground. They want rain without thunder and lightning. They want the ocean without the awful roar of its many waters. This struggle may be a moral one; or it may be a physical one; or it may be both moral and physical; but it must be a struggle."�



��Frederick Douglass







--
Nick Fenger
-Information Technology

Trillium Charter School
5420 N. Interstate Ave
Portland, OR 97217
(503) 285-3833
http://www.trilliumcharterschool.org







--
edubuntu-users mailing list
edubuntu-users@lists.ubuntu.com
Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/edubuntu-users
 

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