swapiness
Brian Cluff
brian at snaptek.com
Tue Mar 1 08:45:30 MST 2016
Check out Hans' "Anatomy of the command line" talk that he gave at
SCaLE. It will show you in detail why that didn't work.... you'll learn
a lot. It's at: https://www.youtube.com/watch?v=Yx_dCte3dEE
As for setting the swappiness permanently create and edit
/etc/sysctl.d/10-swappiness.conf, it probably won't exist by default.
Then put a single like it that is:
vm.swappiness=10
If you want your swappiness set to 0, just change the 10 to 0
Brian Cluff
On 03/01/2016 06:26 AM, Michael wrote:
> I understand. The computer would not allow me to use sudo with redirection .
>
> On Tue, Mar 1, 2016 at 1:09 AM, Michael <bmike1 at gmail.com
> <mailto:bmike1 at gmail.com>> wrote:
>
> fyi: when I attempted to save it in gedit it gave me the permission
> denied error.
>
> On Tue, Mar 1, 2016 at 1:08 AM, Michael <bmike1 at gmail.com
> <mailto:bmike1 at gmail.com>> wrote:
>
> What am i doing incorrectly?
>
> $ sudo cat /proc/sys/vm/swappiness
> 60
> bmike1 at MikesBeast ~ $ sudo cat 30>> /proc/sys/vm/swappiness
> bash: /proc/sys/vm/swappiness: Permission denied
> bmike1 at MikesBeast ~ $ sudo gedit
> bmike1 at MikesBeast ~ $ sudo gedit /proc/sys/vm/swappiness
>
> ** (gedit:10639): WARNING **: Hit unhandled case 13 (Error
> writing to file: Invalid argument) in parse_error.
>
> ** (gedit:10639): WARNING **: Hit unhandled case 13 (Error
> writing to file: Invalid argument) in parse_error.
> bmike1 at MikesBeast ~ $ sudo cat >> /proc/sys/vm/swappiness<<eof
> > 1
> > eof
> bash: /proc/sys/vm/swappiness: Permission denied
> bmike1 at MikesBeast ~ $ sudo cat >> /proc/sys/vm/swappiness<<eof
> 1
> eof
> ^C
> bmike1 at MikesBeast ~ $ sudo cat /proc/sys/vm/swappiness
> 1
>
> WHATEVER! lol
>
> On Tue, Mar 1, 2016 at 12:43 AM, Michael <bmike1 at gmail.com
> <mailto:bmike1 at gmail.com>> wrote:
>
> have a desktop. in any case I searched google this swapiness
> question and here is what it says:
>
> "
> After rebooting the swappiness is set to 10. This can be
> checked by
> running the following command in a terminal: sudo cat
> /proc/sys/vm/swappiness.
> The swap tendency can have a value of 0 (fully off) to 100
> (swap is constantly used).
> A workable and practical rule for changing the swappiness
> can be:
> 1 GB or more RAM: 10
> Less than 1 GB of RAM: 1
> _*Tip:*_
> Your computer has less than 512 MB of RAM? Try to change
> the swap tendency to 0 (zero). With lower amount of memory
> installed, this might even give a better result then
> changing the swap tendency to 1.
> "
>
> Why is 0 better than 1?
>
> On Tue, Mar 1, 2016 at 12:38 AM, Kevin Fries
> <kevin at fries-biro.com <mailto:kevin at fries-biro.com>> wrote:
>
> Linux is not Windows. Linux can, and will run without
> using swap if it can. Linux will remain RAM resident
> unless it has to. So, what they are telling you is
> this... If you don't need swap, don't define it.
>
> There is one exception to this rule, since you are using
> a laptop. There are two instant on technologies, sleep
> and hibernate. One of the will stash the state to RAM,
> the other to swap. I forget which is which. But if it
> needs to go to swap, you will need a swap file equal to
> RAM if you use that feature.
>
> Kevin
>
> On Feb 29, 2016 10:32 PM, "Michael" <bmike1 at gmail.com
> <mailto:bmike1 at gmail.com>> wrote:
>
> swapiness=..... 0? Remember; I am computer-illiterate!
>
> On Mon, Feb 29, 2016 at 11:47 PM, Todd Millecam
> <tyggna at gmail.com <mailto:tyggna at gmail.com>> wrote:
>
> Disable swap. Never activate it on boot. If
> you start reaching oom conditions, turn it back on.
>
> On Mon, Feb 29, 2016 at 9:38 PM, Michael
> <bmike1 at gmail.com <mailto:bmike1 at gmail.com>> wrote:
>
> What do you recommend you reduce swapiness
> to for machines that have plenty of memory
> that will probably never be filled?
>
> --
> :-)~MIKE~(-:
>
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