SOLVED: Simple swap question

[FreeBSD]

Jerry McAllister a écrit :
> On Thu, Dec 18, 2008 at 12:02:06PM -0500, FreeBSD wrote:
>
>   
>> Daniel Bye a écrit :
>>     
>>> On Thu, Dec 18, 2008 at 10:28:18AM -0600, Kirk Strauser wrote:
>>>       
>>>> On Thursday 18 December 2008 09:16:10 FreeBSD wrote:
>>>>         
>>>>> Hi everyone,
>>>>>
>>>>> I have a FreeBSD 7.0-Release server that started to swap after an error
>>>>> in a shell script (process spawning competition ;-) ). I killed the
>>>>> shell and the RAM is now OK. The problem is that the swap is still used.
>>>>> How can I "reset" the swap?
>>>>>           
>>>> You don't.  The system will handle it for you, I promise.  :-)
>>>>         
>>> And very well, too.
>>>
>>> You can prompt it to move pages back into RAM if you start using a swapped-
>>> out process again - say, for example, a quiescent word processor had been
>>> swapped out, you could get it back by raising it and starting to type.
>>>
>>> But as Kirk said, there really is no need. It's one of the kernel's many
>>> jobs, and I'm inclined to leave it get on with it!
>>>
>>> Dan
>>>
>>>       
>> Thanks for your answer. I'm asking here because it's been several days 
>> and there is still used swap for data that should never be used anymore. 
>> If the kernel wants to keep it, why not move it to RAM now that there is 
>> some free?
>>     
>
> Why bother if it isn't being currently used?
>
> ////jerry
>
>   
Because this server is monitored by Nagios and it emails me every hour a 
warning because the swap is not 100% free (I know it's pretty extreme, 
but I want to know if the system is swapping).

I just tried

swapoff -a ; swapon -a

and it worked great.

Thanks everyone for your answer.

Martin