Re: Memory upgrade

On 10/15/24 15:09, Claudio Jeker wrote:
> On Tue, Oct 15, 2024 at 02:35:03PM +0200, Christian Schulte wrote:
>> On 10/15/24 12:45, Claudio Jeker wrote:
>>> On Tue, Oct 15, 2024 at 12:28:20PM +0200, Christian Schulte wrote:
>>>> On 10/15/24 12:09, Stuart Henderson wrote:
>>>>> On 2024-10-15, Zé Loff <zeloff@zeloff.org> wrote:
>>>>>> On Tue, Oct 15, 2024 at 10:14:42AM +0200, Christian Schulte wrote:
>>>>>>> ulimit -d `ulimit -aH | grep data | awk '{print $2}'`
>>>>>>> ulimit -n `ulimit -aH | grep nofiles | awk '{print $2}'`
>>>>>
>>>>> ulimit -d `ulimit -dH` etc... but then there's no point setting a
>>>>> separate hard limit in login.conf.
>>>>
>>>> Of course. I am the only user on that system and the only limits I want
>>>> "my" xsession to be in effect on that system are the hard limits setup
>>>> by the kernel. Those make the system swap for no apparent reasons. So.
>>>> Why is this thing swapping?
>>>
>>> Because you are out of memory (most probably the usual amd64 problem of
>>> running out of dma reachable memory and the pagedaemon going berserk about
>>> that). You have plenty of ram just in the wrong spot.
>>>
>>
>> According to the readings of top(1) or vmstat(8) I am not hitting any
>> physical RAM limits. Still. The system starts swapping and I am yet to
>> find out why it does. Maybe it just cannot fulfill requests for larger
>> chunks of memory but does not "tell" an application about it and just
>> commits itself to swapping? Makes no sense to me reading output of
>> top(1) or vmstat(8) displaying that the system has swapped out more than
>> half a GB to disk when nearly half of the RAM available to the system
>> (8GB) is not even wired up. The system reports nearly 4GB of physical
>> RAM available for allocation together with more than half of a GB
>> swapped out to disk. Makes no sense.
>>
>
> Please read again. You are out of memory below 4GB (dma reachable physical
> memory). The pagedaemon does a very poor job in that case and this is what
> you see. It is a known issue and a fix will eventually emerge.
>
> If the problem was trivial it would have been fixed already.

I am not around here for working on things a chimpanzee could be trained
to do.

--
Christian