Gene Heskett <gheskett@shentel.net> writes: > On Monday 17 September 2018 03:18:09 Philip Hands wrote: > >> Gene Heskett <gheskett@shentel.net> writes: >> > On Saturday 15 September 2018 16:16:24 Jeffrey Walton wrote: >> >> On Fri, Sep 14, 2018 at 8:16 PM, Alan Corey <alan01346@gmail.com> >> > >> > wrote: >> >> > My /etc/fstab just has >> >> > /var/swap2 none swap sw 0 0 >> >> > That's for a swap file which was made by dding 0s into it, then >> >> > running mkswap. >> >> > >> >> > You'd replace /var/swap2 with /dev/sda2 >> >> > >> >> > Sounds like you're just not loading it from your fstab. Should >> >> > load every boot. Nothing new or tricky there. >> >> >> >> In addition, it also helps to set swappiness to a low value, like 1 >> >> or 3, on modern kernels. That has the effect of telling the kernel >> >> to prefer to keep things in memory. >> >> >> >> With swapon and low swappiness I can actually run a C++ compiler >> >> with multiple jobs and without an OOM kill. >> >> >> >> Jeff >> > >> > And pray tell, where does one set that swappiness? >> > Sounds like something that could be handy. >> >> When wondering that sort of thing, I generally try this sort of >> command to find out: >> >> sudo find /sys /proc -name \*swappiness\* | less >> >> which in this case leads you quite quickly to /proc/sys/vm/swappiness >> >> which you can do things like: >> >> cat /proc/sys/vm/swappiness > currently 60 >> and >> >> echo 1 > /proc/sys/vm/swappiness >> >> with. Of course, that will only persist until the next reboot, so >> you'd then want to set things in /etc/sysctl.* to make things >> permanent. >> >> There are man pages for sysctl.d, sysctl.conf and sysctl, and also a >> README in /etc/sysctl.d/ >> >> Something like this (as root) would do the trick: >> >> echo vm.swappiness=1 > /etc/sysctl.d/local-swapiness.conf >> >> (that's all true on Debian -- no idea how much of that applies for >> *bian derivatives). >> > Like jessie for raspbian? Seems to be there, and that file/contents has > now been created. So we'll see if it helps. >> Cheers, Phil. > > Thank you very much, Phil. But this leads to two more questions, the > first being: > > Can something along this general line by used to make the kernel > recognize at boot time, the settings contained in the (XFCE) > menu>preferences>keyboard-and-mouse? I have a pi-3b running jessie that > has a 500 cps keyboard repeat UNTIL this preference adjuster is run, > then closed w/o changing anything. No idea I'm afraid -- I don't have any RaspberryPi stuff (as I don't appreciate the binary blobs) and this seems like it's probably rather specific to the equipment you are using. Cheers, Phil. -- |)| Philip Hands [+44 (0)20 8530 9560] HANDS.COM Ltd. |-| http://www.hands.com/ http://ftp.uk.debian.org/ |(| Hugo-Klemm-Strasse 34, 21075 Hamburg, GERMANY
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