[Freedombox-discuss] Occasional freezes

[permondes - sagen]

I have now zram-tools installed and running. Contrarily to the
documentation, a 256 MB memory (using 137 MB of real RAM) is set up. I
checked the bash script, it's the defaul if the config file is not
changed.SWAP is now used to 25 %; my impression is the device is
running quicker now, even though I have Coquelicot re-enabled and also
other apps I have been using. I will report if I run in issues in the
future.
So my recommendation as a quick solution is to enable zram by default,
maybe reducing the size a bit. Still, a 2nd swap with lower priority
should be added on the SD-card if RAM is not sufficient, in my opinion.	
	Dietmar
Am Donnerstag, den 31.01.2019, 10:19 +0100 schrieb permondes - sagen:
> Thanks, I will disable Coquelicot for the moment.
> 
> I am currently reading through zram and zswap, both sound promising
> even though I do not fully understand them.
> zram seems to create a space in RAM for a compressed swap, so more
> user data can be stored in RAM,
> whereas zswap works same as zram as long as possible and when more
> memory is required, it switches to file Swap.
> Maybe these are alternatives to traditional swap?
> 
> zram is in debian testing, zswap I found in wikipedia.
> 
> I will think about whether to use a USB ext4 device as swap or try
> zram.
> 
> By the way (but I think these are not related to my issues), 
> a) even though I disabled Tor, there is a process still running.
> b) default-mysql-server upgrade is held back in apt
> 
> 	Dietmar
> 
> Am Donnerstag, den 31.01.2019, 14:39 +0530 schrieb Joseph
> Nuthalapati:
> > We have recently made a switch from apache mod-php to the php-fpm
> > module. php-fpm runs a daemon in the background which can take up
> > some RAM.
> > 
> > Maybe, you can also keep Coquelicot disabled for a while and see
> > the
> > results.
> > 
> > We have a feature request to add a swap space by default to
> > FreedomBox
> > images. Swap not working on btrfs filesystems is a bit
> > disappointing.
> > 
> > This might be a bad idea, but you can probably use an attached USB
> > disk
> > as the swap partition.
> > 
> > 
> > On 31/01/19 2:23 pm, permondes - sagen wrote:
> > > Oh Sh....
> > > Swap files are not allowed on btrfs
> > > 
> > > manpages say:
> > > > *swapon* may not work correctly when using a swap file with
> > > > some
> > > > versions  of *btrfs*. This is due to btrfs being a copy-on-
> > > > write
> > > > filesystem: the  file location may not be static and corruption
> > > > can
> > > > result. Btrfs actively  disallows the use of swap files on its
> > > > filesystems by refusing to map the  file.
> > > 
> > > So I have to generate a swap partition on a micro-SD card. I
> > > think to
> > > have read this was discouraged because wear leveling was then
> > > inefficient.
> > > 
> > > I would put a remark in our hardware section to avoid devices
> > > with <1 GB
> > > RAM.
> > > I will do this after I am sure my issues come from running out of
> > > RAM.
> > > 
> > > Dietmar
> > > 
> > > Am Donnerstag, den 31.01.2019, 09:32 +0100 schrieb permondes -
> > > sagen:
> > > > Thanks for the hint, but it runs into bug #913481.
> > > > I will do it according to the debian wiki > swap
> > > > 
> > > > Nevertheless, it would be better to find the cause of the
> > > > freezes by
> > > > investigating some log files.
> > > > Currently I just see the authentication errors in coqueliqot
> > > > and
> > > > actually also in mediawiki - but both work.
> > > > 
> > > > Dietmar
> > > > 
> > > > Am Mittwoch, den 30.01.2019, 23:15 +0100 schrieb Petter
> > > > Reinholdtsen:
> > > > > [Permondes - Sagen]
> > > > > > I am considering to set up a SWAP-file on FBx in order to
> > > > > > avoid the
> > > > > > risk of running out of RAM. Will this interfere with the
> > > > > > FBx ecosystem? 
> > > > > 
> > > > > 
> > > > > I doubt it, but can not say for sure.  Are you aware of the
> > > > > dphys-swapfile package?  I suspect just installing it might
> > > > > do what you
> > > > > want.
> > > > > 
> > > > > --
> > > > > Happy hacking
> > > > > Petter Reinholdtsen
> > > > > 
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