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Groups > linux.debian.user > #262035
| From | gene heskett <gheskett@shentel.net> |
|---|---|
| Newsgroups | linux.debian.user |
| Subject | Re: swap-fle on arm64, need to disable, how? |
| Date | 2023-10-01 10:40 +0200 |
| Message-ID | <Hk09z-cLph-3@gated-at.bofh.it> (permalink) |
| References | <HjrbP-cpWt-11@gated-at.bofh.it> <HjLWV-cCBi-1@gated-at.bofh.it> <HjQMV-cFvR-1@gated-at.bofh.it> <HjVjz-cIoi-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 9/30/23 23:22, hw wrote: > On Sat, 2023-09-30 at 18:29 -0400, gene heskett wrote: >> On 9/30/23 13:28, Matthias Böttcher wrote: >>> sudo dphys-swapfile swapoff >>> sudo systemctl stop dphys-swapfile.service >>> sudo systemctl disable dphys-swapfile.service >>> >>> . >> However that did give me a clue about getting rid of zram0, which has >> been done now, thank you. Now I hope to uncomment the SSD line in fstab. > > Well, zram is the way to go; why would you still use swap partitions > or swap files instead? Are you deliberately trying to wear out your > SSDs or to slow down your computer? > zram is probably the way to go for board with lots of dram. Something the pi's don't have. My only pi is an early rpi4b, Claims 2G, shows 1.8G. I tend to do big things with it. I was first on this ball of rock and water to make linuxcnc and that pi, run an 80 yo lathe I converted to cnc controls. Teaching that lathe tricks it could not do when it shipped out out Chicago circa 1946. To steal over a gig for zram style swap does not make any sense to me. There's compression and decompression involved too I'm told. By putting swap on a 10G partition on a 500meg a second SSD, brings big memory into the picture, allowing that little card to do big things without running out of memory. I've built its own realtime kernels on it is 23 minutes, linuxcnc with its docs including some translations ran it 200megs into that zram and took nearly 4 hours. With real swap back on buster, just under an hour. Just the English docs are now over 1000 pages of dead tree. What we really need are translators. Except for the de stuff, other languages are quite incomplete, but this old Iowa farm kid doesn't speak anything but English, and doesn't even touch type. I'm not a "working shop" other than my own product, just a retired bc engineer. I basically serve as the canary in the coal mine for linuxcnc, keeping that pi up to date with the git master & looking for showstoppers. This gets done several times a week, doing a decent job of keeping me out of the bars. > Fedora has it by default since a while, and at first I thought it's a > very stupid idea. In practise, I can't be bothered anymore to create > these annoying swap partitions. They're only a waste of disc space. > There haven't been any issues with it, and when the machine runs out > of memory, using swap partitions or swap files isn't going to fix > that. But with zram taking over half its memory, its into swap and slowing down quicker, and plumb out of memory for big jobs, when it could still be working fine with bigger, albeit probably slower than zram, swap. I've no clue how much the zram compression slows it in terms of thru put. I wiped out the git clone of linuxcnc by re-arranging that SSD yesterday, but I'll do another build later today and see how long it takes with real swap. Thank you. Take care & stay well. > > . Cheers, Gene Heskett. -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/>
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swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-09-29 21:20 +0200
Re: swap-fle on arm64, need to disable, how? Andy Smith <andy@strugglers.net> - 2023-09-29 21:30 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-09-29 22:40 +0200
Re: swap-fle on arm64, need to disable, how? Andy Smith <andy@strugglers.net> - 2023-09-29 23:40 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-09-30 09:30 +0200
Re: swap-fle on arm64, need to disable, how? Andy Smith <andy@strugglers.net> - 2023-09-30 13:50 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-09-30 17:20 +0200
Re: swap-fle on arm64, need to disable, how? Andy Smith <andy@strugglers.net> - 2023-09-30 22:20 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-10-01 02:30 +0200
Re: swap-fle on arm64, need to disable, how? Curt <curty@free.fr> - 2023-10-01 17:10 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-10-01 19:00 +0200
Re: swap-fle on arm64, need to disable, how? David Wright <deblis@lionunicorn.co.uk> - 2023-09-30 20:20 +0200
Re: swap-fle on arm64, need to disable, how? Max Nikulin <manikulin@gmail.com> - 2023-09-30 03:30 +0200
Re: swap-fle on arm64, need to disable, how? Matthias Böttcher <matthias.boettcher@gmail.com> - 2023-09-30 19:30 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-09-30 20:00 +0200
Re: swap-fle on arm64, need to disable, how? Greg Wooledge <greg@wooledge.org> - 2023-09-30 20:20 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-10-01 01:50 +0200
Re: swap-fle on arm64, need to disable, how? Max Nikulin <manikulin@gmail.com> - 2023-10-01 10:20 +0200
Re: swap-fle on arm64, need to disable, how? Matthias Böttcher <matthias.boettcher@gmail.com> - 2023-09-30 21:30 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-10-01 00:40 +0200
Re: swap-fle on arm64, need to disable, how? Stefan Monnier <monnier@iro.umontreal.ca> - 2023-10-01 04:30 +0200
Re: swap-fle on arm64, need to disable, how? hw <hw@adminart.net> - 2023-10-01 05:30 +0200
Re: swap-fle on arm64, need to disable, how? Max Nikulin <manikulin@gmail.com> - 2023-10-01 10:10 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-10-01 11:10 +0200
Re: swap-fle on arm64, need to disable, how? Greg Wooledge <greg@wooledge.org> - 2023-10-01 15:00 +0200
Re: swap-fle on arm64, need to disable, how? "Andrew M.A. Cater" <amacater@einval.com> - 2023-10-01 15:40 +0200
Re: swap-fle on arm64, need to disable, how? David Wright <deblis@lionunicorn.co.uk> - 2023-10-01 17:40 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-10-01 19:00 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-10-01 18:50 +0200
Re: swap-fle on arm64, need to disable, how? Stefan Monnier <monnier@iro.umontreal.ca> - 2023-10-01 20:10 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-10-01 21:20 +0200
Re: swap-fle on arm64, need to disable, how? Stefan Monnier <monnier@iro.umontreal.ca> - 2023-10-02 00:50 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-10-04 10:10 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-10-01 10:40 +0200
Re: swap-fle on arm64, need to disable, how? David Wright <deblis@lionunicorn.co.uk> - 2023-10-01 17:40 +0200
Re: swap-fle on arm64, need to disable, how? hw <hw@adminart.net> - 2023-10-01 22:10 +0200
Re: swap-fle on arm64, need to disable, how? gene heskett <gheskett@shentel.net> - 2023-10-02 02:00 +0200
Re: swap-fle on arm64, need to disable, how? Max Nikulin <manikulin@gmail.com> - 2023-10-03 04:40 +0200
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