Related to: FC4 Sluggishness on a 466 MHz Celeron

Mike McCarty mike.mccarty at sbcglobal.net
Wed Jul 13 06:47:49 UTC 2005


Paul Howarth wrote:

>On Tue, 2005-07-12 at 22:05 -0500, Mike McCarty wrote:
>  
>
>>Tony Nelson wrote:
>>
>>    
>>
>>>At 2:08 PM -0500 7/12/05, Mike McCarty wrote:
>>> 
>>>
>>>      
>>>
>>[with regards to /proc/sys/vm/swappiness]
>>
>>    
>>
>>>>>     
>>>>>
>>>>>          
>>>>>
>>>>So is mine, and attempts to edit that file fail.
>>>>   
>>>>
>>>>        
>>>>
>>>Works here.  Were you root?  Do you really mean "edit" or did you:
>>>
>>>   # cat 59 >/proc/sys/vm/swappiness
>>>
>>>I get permission denied as a normal user, while the value sticks if I'm
>>>root.  The sign that the patch is in the kernel is that changes don't
>>>stick.  So I suppose it never made it in.
>>> 
>>>
>>>      
>>>
>>I was logged in as myself, with su. I used an editor which read it fine.
>>Attempts to save the edit failed with access denied. I did not try a cat.
>>    
>>
>
>/proc files aren't regular files and editing them with a regular editor
>may not work.
>
>Neither would the "cat" command above, unless there was a file called
>"59" in the current directory.
>
>What was probably meant was:
># echo 59 /proc/sys/vm/swappiness
>
>Paul.
>  
>
Are there any places which suggest how one can find a reasonable
value for the contents of swappiness? Other than a binary search
starting with 1 and 50 as the initial values, I mean.

Mike

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