So interestingly enough I was looking at my swap from this convo, and surprisingly noticed that I'd never added any swap to this system! I built the swap lvm slice, but never added it to the fstab, don't remember if on-purpose or not. This system has 128gb of ram, so not that I notice really, but might explain why I might see some weird lagging at times. I usually blame (crap) compositing... I suppose I've been using this pc for a couple years now without swap, so it *is* doable (with a lot of ram), but I think I might enable it and see if things are any better with than without swap. -mb On Mon, Sep 24, 2018 at 9:46 AM Stephen Partington wrote: > YEah, So I always consider installing at least a GB or two for swap and > setting swappiness to 0 for that. It also might explain why Mr Butash still > can see a difference in performance on what he does when swap is there or > not. > > On Mon, Sep 24, 2018 at 9:44 AM Carruth, Rusty > wrote: > >> Wow, that quote is very interesting. >> >> >> >> Thanks! >> >> >> >> (google found the reference for me. One of them (possibly the original >> reference others are using) is >> https://www.kernel.org/doc/gorman/html/understand/understand014.html ) >> >> >> >> I read it, and it appears that the reference is talking primarily about >> what the kernel does. I kept searching and couldn’t find any definitive >> statement that a PROGRAM could request this, however apparently some JVM >> somewhere can do something with memory that almost requires there be swap >> to keep the JVM from getting killed by the OOM monster… er, killer… er, >> task.. er, whatever. >> >> >> >> >> >> Rusty >> >> >> >> *From:* PLUG-discuss [mailto:plug-discuss-bounces@lists.phxlinux.org] *On >> Behalf Of *Stephen Partington >> *Sent:* Sunday, September 23, 2018 12:18 AM >> *To:* Main PLUG discussion list >> *Subject:* Re: To swap or not to swap ;-) (was RE: To lvm or not to lvm) >> >> >> >> I have found some applications use swap with direct calls. >> >> >> >> "A significant number of the pages referenced by a process early in its >> life may only be used for initialisation and then never used again. It is >> better to swap out those pages and create more disk buffers than leave them >> resident and unused." >> >> >> --------------------------------------------------- >> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org >> To subscribe, unsubscribe, or to change your mail settings: >> http://lists.phxlinux.org/mailman/listinfo/plug-discuss > > > > -- > A mouse trap, placed on top of your alarm clock, will prevent you from > rolling over and going back to sleep after you hit the snooze button. > > Stephen > > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org > To subscribe, unsubscribe, or to change your mail settings: > http://lists.phxlinux.org/mailman/listinfo/plug-discuss