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| The Following User Says Thank You to shadowjk For This Useful Post: | ||
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2010-09-09
, 19:56
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Posts: 909 |
Thanked: 216 times |
Joined on Nov 2009
@ Bremen, Germany
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#42
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i created a file named swapmop in etc/event.d/
content:
then i rebooted.
when doing cat /proc/sys/vm/swappiness, it still sais "100"
what am i doing wrong? :O
content:
# swappiness auf 30
start on started rcS-late
script
echo 30 > /proc/sys/vm/swappiness
end script
when doing cat /proc/sys/vm/swappiness, it still sais "100"
what am i doing wrong? :O
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2010-09-09
, 20:12
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Posts: 2,829 |
Thanked: 1,459 times |
Joined on Dec 2009
@ Finland
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#43
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Originally Posted by shadowjk
Would it be possible to share that script with us?
...and I now have a script that checks iostat for amount of writes and does swapoff/swapon/swapoff via a temporary swapfile when writes exceed swap size..
| The Following User Says Thank You to slender For This Useful Post: | ||
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2010-09-09
, 20:41
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Posts: 42 |
Thanked: 13 times |
Joined on Jun 2010
@ Netherlands
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#44
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Originally Posted by msa
try to add:
i created a file named swapmop in etc/event.d/
content:
then i rebooted.
when doing cat /proc/sys/vm/swappiness, it still sais "100"
what am i doing wrong? :O
Code:
#!/bin/sh
also try
Code:
chmod a+x /etc/event.d/swapmop
| The Following User Says Thank You to sake For This Useful Post: | ||
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2010-09-09
, 21:09
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Posts: 909 |
Thanked: 216 times |
Joined on Nov 2009
@ Bremen, Germany
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#45
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Originally Posted by sake
the #!/bin/sh helped! thanks!
try to add:
at the very beginning of your script.Code:#!/bin/sh
also try
as rootCode:chmod a+x /etc/event.d/swapmop
though right now i'm not seeing any differences at all...
/edit:
ha, there is a difference: my RAM-usage is constantly at around 180 mb. not sure if thats good...?!
Last edited by msa; 2010-09-09 at 21:32.
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2010-09-10
, 20:49
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Posts: 992 |
Thanked: 995 times |
Joined on Dec 2009
@ California
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#46
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#!/bin/sh should not have difference. But don't forget a space between 30 and >
Actually, it is better to use this script in /etc/event.d/myscript
Sorry for possible misguide...
Actually, it is better to use this script in /etc/event.d/myscript
Code:
description "tuning system"
author My Name
console output
start on started rcS-late
script
echo "30" > /proc/sys/vm/swappiness
end script
Sorry for possible misguide...
| The Following User Says Thank You to egoshin For This Useful Post: | ||
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2010-09-10
, 21:01
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Posts: 515 |
Thanked: 266 times |
Joined on Nov 2009
@ Oelsted, Denmark
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#47
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Originally Posted by msa
Using the memory available isn't a BAD thing...
ha, there is a difference: my RAM-usage is constantly at around 180 mb. not sure if thats good...?!
Running out of memory is though... That's where swap is useful.High swappiness makes the system swap out (RAM->SWAP) aggressively (idle processes memory blocks are moved to disk).
Low swappiness swaps out when memory is running full instead.
http://kerneltrap.org/node/3000
Experiment with it and find out what setting fits Your usage pattern...
I wouldn't recommend setting the value too low (30 seems fine here so far).
Last edited by DrWilken; 2010-09-10 at 21:05.
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2010-09-10
, 22:13
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Posts: 909 |
Thanked: 216 times |
Joined on Nov 2009
@ Bremen, Germany
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#48
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Originally Posted by egoshin
thanks!
#!/bin/sh should not have difference. But don't forget a space between 30 and >
Actually, it is better to use this script in /etc/event.d/myscript
Sorry for possible misguide...
i tried to use your script, but it did not work. i ended up modifying it until i had the first script i used to make it work.
i had to remove the following part:
Code:
description "tuning system" author My Name console output
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2010-09-10
, 22:24
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Posts: 515 |
Thanked: 266 times |
Joined on Nov 2009
@ Oelsted, Denmark
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#49
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This worked for me (/etc/event.d/tuning):
No chmod'ing or anything else needed (look at all the other files in /etc/event.d)...
Last edited by DrWilken; 2010-09-22 at 09:54.
Code:
description "System Tuning"
author "Christian Wilken"
console output
start on started rcS-late
script
echo "30" > /proc/sys/vm/swappiness
echo "1" > /proc/sys/vm/oom_kill_allocating_task
end script
Last edited by DrWilken; 2010-09-22 at 09:54.
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2010-09-10
, 22:55
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Posts: 166 |
Thanked: 30 times |
Joined on Apr 2010
@ Halifax, UK
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#50
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its easier to use vi editor for this, run
sudo gainroot
vi /etc/init.d/rcS
scroll down to 263/281
press the letter i - don't press enter after
it looks like this
echo 100 > /proc/sys/vm/swappiness
use the arrows to move the cursor and change the value to 30 or whatever you want - keep it above 30 tho
then press the onscreen 'esc' button
then type this
:wq
then hit enter
sudo gainroot
vi /etc/init.d/rcS
scroll down to 263/281
press the letter i - don't press enter after
it looks like this
echo 100 > /proc/sys/vm/swappiness
use the arrows to move the cursor and change the value to 30 or whatever you want - keep it above 30 tho
then press the onscreen 'esc' button
then type this
:wq
then hit enter
At one point I plotted all writes done by kswapd, and found that it's indeed mostly sequential until it reaches the end of the swap area, after which it becomes increasingly random.. swapoff/swapon fixes that, and I now have a script that checks iostat for amount of writes and does swapoff/swapon/swapoff via a temporary swapfile when writes exceed swap size..