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