On a sunny day (Mon, 27 Jan 2020 20:01:23 +0000) it happened druck
 wrote in :

>On 27/01/2020 18:45, The Natural Philosopher wrote:
>> On 27/01/2020 16:13, druck wrote:
>>> On 26/01/2020 06:54, Jan Panteltje wrote:
>>>> If the swap file is full then what will happen?
>>>
>>> In practice the system will appear to hang for a while, possibly a
>>> long while, until applications which require more memory either exit
>>> cleanly or crash, freeing up some memory and/or swap.
>>>
>> Er no. calls to malloc() will fail and serious errors in applications
>> will happen.
>
>When calls to malloc fail, a well written application will handle the
>error and exit cleanly, a badly written one will ignore the failure and
>crash - as I just said.
>
>There is a third option, which is actually worse - the application
>handles the error and continues to run. This will cause the system to
>run at a glacial speed as it swaps in and out each application, hoping
>that one of them does eventually exit or crash - hence the appearing to
>hang bit above.
>
>---druck

OK, thnak you.
Better avoid it getting full!
Seems OK now:

Fri 24 Jan 2020 03:10:42 PM CET:
MiB Mem :   3906.0 total,   2891.6 free,    378.2 used,    636.2 buff/cache
MiB Swap:    100.0 total,     20.4 free,     79.6 used.   3378.8 avail Mem

Sat 25 Jan 2020 06:46:05 AM CET
MiB Mem :   3906.0 total,   2653.7 free,    372.0 used,    880.4 buff/cache
MiB Swap:    100.0 total,     24.7 free,     75.3 used.   3380.4 avail Mem

Sun 26 Jan 2020 07:32:08 AM CET
MiB Mem :   3906.0 total,   3265.9 free,    370.6 used,    269.5 buff/cache
MiB Swap:    100.0 total,     26.9 free,     73.1 used.   3383.9 avail Mem

Mon 27 Jan 2020 07:01:17 AM CET
MiB Mem :   3906.0 total,   3364.9 free,    372.7 used,    168.4 buff/cache
MiB Swap:    100.0 total,     28.7 free,     71.3 used.   3382.6 avail Mem

Tue 28 Jan 2020 04:40:45 AM CET
iB Mem :   3906.0 total,   2881.9 free,    374.7 used,    649.5 buff/cache
MiB Swap:    100.0 total,     29.5 free,     70.5 used.   3375.7 avail Mem

Getting better!

So I will leave it running this way,
Do not fix it if it works!

For the other poster, as the system is just writing video to disk
using a shorter cache (by writing it more often to harddisk) has no bad side
affects,
the stuff will have to be written to disk anyways.
In fact the writing periods will be more often and shorter,
but it is the same amount of data,
Writing to disk more often causes less long interrupts
and keeps more memory available.

In fact Linux caching results in a high video delay on some of my systems
(PCs)!
20 seconds for mcamip is normal!

Also it is a security risk, in case of a power failure you lose the last
(likely most important part where you see the bad guy cutting the cables) 20
seconds.

--- SoupGate-Win32 v1.05