Will swap useage auto cleanup?

[Justin Sherrill]

I had the same symptoms with a runaway openjdk7 program, where
killing/restarting the program on a regular basis would keep it from
happening...  but I never caught a high usage on swap.



On Wed, Feb 26, 2014 at 12:29 AM, lhmwzy <lhmwzy at gmail.com> wrote:

> It has serveral times run into no responese problem.
> the console messages are:
> cache_lock blocked on 0xffffffe085065430 80000001 "blocklist.RSA-2048"
> swap_pager: indefinite wait buffer: offset: 416837632,size:4096
> swap_pager: indefinite wait buffer: offset: 416837632,size:4096
> swap_pager: indefinite wait buffer: offset: 416837632,size:4096
> swap_pager: indefinite wait buffer: offset: 416837632,size:4096
> swap_pager: indefinite wait buffer: offset: 416837632,size:4096
> swap_pager: indefinite wait buffer: offset: 416837632,size:4096
> swap_pager: indefinite wait buffer: offset: 416837632,size:4096
> swap_pager: indefinite wait buffer: offset: 416837632,size:4096
> swap_pager: indefinite wait buffer: offset: 416837632,size:4096
> .....
>
> nodump and can't login in through ssh or console.
>
> So is this issue  related to swap useage?
>
>
> 2014-02-26 10:53 GMT+08:00 Justin Sherrill <justin at shiningsilence.com>:
>
>> Wait, that 42M used is after some time?  That's <1% - normal.  I assume
>> it's being indexed there.  I've never had exactly 0% swap usage, and that
>> low indicator isn't a sign of anything to worry about.
>>
>>
>> On Tue, Feb 25, 2014 at 9:29 PM, lhmwzy <lhmwzy at gmail.com> wrote:
>>
>>> The only program I run is buildworld and buildkerenl,nothing else.
>>> When  buildworld and buildkerenl finished,the swap won't be released
>>> even several days have passed.
>>>
>>>
>>> 2014-02-26 10:21 GMT+08:00 Justin Sherrill <justin at shiningsilence.com>:
>>>
>>>> If swap usage is growing, some program is running that is eating up
>>>> more memory than you have physically available.  It won't be reclaimed by
>>>> the operating system unless the program using that memory releases it.  The
>>>> question is, what program are you running that is so memory-hungry?
>>>>
>>>>
>>>> On Tue, Feb 25, 2014 at 7:58 PM, lhmwzy <lhmwzy at gmail.com> wrote:
>>>>
>>>>> I just have a question
>>>>> When swap space is used more and more, will the system automatically
>>>>> free up the used the swap space as time go on?
>>>>> If yes,when and how.
>>>>>
>>>>>  top show as fllowing:
>>>>>
>>>>> Memory: 645M Active, 768M Inact, 378M Wired, 13M Cache, 211M Buf, 153M
>>>>> Free
>>>>> Swap: 4096M Total, 42M Used, 4054M Free, 1% Inuse
>>>>>
>>>>> the swap used space is growing larger and larger.
>>>>> Server days go on and could not be freed up.
>>>>>
>>>>> sorry for my pool english,I hope you can understand what I have said.
>>>>>
>>>>
>>>>
>>>
>>
>
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