On Tue Feb28'23 03:23:37PM, Richard Shaw wrote: > From: Richard Shaw <hobbes1069@xxxxxxxxx> > Date: Tue, 28 Feb 2023 15:23:37 -0600 > To: Community support for Fedora users <users@xxxxxxxxxxxxxxxxxxxxxxx> > Reply-To: Community support for Fedora users <users@xxxxxxxxxxxxxxxxxxxxxxx> > Subject: Re: recommended partition for swap with 0.5 TB memory > > On Tue, Feb 28, 2023 at 2:48 PM Ranjan Maitra <mlmaitra@xxxxxxx> wrote: > > > On Tue Feb28'23 01:56:08PM, Richard Shaw wrote: > > > From: Richard Shaw <hobbes1069@xxxxxxxxx> > > > Date: Tue, 28 Feb 2023 13:56:08 -0600 > > > To: Community support for Fedora users <users@xxxxxxxxxxxxxxxxxxxxxxx> > > > Reply-To: Community support for Fedora users < > > users@xxxxxxxxxxxxxxxxxxxxxxx> > > > Subject: Re: recommended partition for swap with 0.5 TB memory > > > > > > On Tue, Feb 28, 2023 at 1:43 PM Ranjan Maitra <mlmaitra@xxxxxxx> wrote: > > > > > > > Hi, > > > > > > > > I am trying to install Fedora on to a new machine that has 0.5 TB RAM. > > > > Hard drives are 256 GB for / and friends, and 2 TB for /home > > partition. In > > > > the past, it used to be suggested that swap be twice that of RAM: this > > > > later changed to the same amount, and now it is very unclear (to me) > > > > because I have not tracked the latest recommendations. Anyway, what > > would > > > > you suggest? The machine is a Dell Precision 7920 with 28 cores/56 > > threads. > > > > > > > > > > By 0.5TB you mean 512GB of ram? Assuming you're installing Fedora 36 or > > 37, > > > I would just leave the defaults alone, which utilizes swap on zram. So > > > basically it won't use any swap unless needed. You can adjust the amount > > of > > > memory allowed to be used for swap. > > > > > > > I decided to let the automatic installer pick up the partition. It > > correctly sets aside 4 TiB (sorry, it was 4TiB, not 2TiB as mentioned > > earlier) for /home, and then 1 GiB for /boot, 600 MiB for /boot/efi, 70 GiB > > for / and leaves aside the rest (as free space). I can adjust the 70 GiB, > > but do I need to keep aside space for the zram? I am unsure about what to > > do with so much free space? > > > > With zram you set a maximum amount of memory which can be used as swap (I > think the default is 50% but it may have a maximum set). How it works is > that it compresses the memory, generally giving around 2X compression. The > CPU cost to compress/decompress is much faster than swapping to disk, > perhaps not as much with modern NVMe drives, but it does help relieve > memory pressure without causing unnecessary writes to your expensive SSDs > :) > Thanks! So, at this point, I will simply increase / to cover around 250 GiB: my plan is to simply copy the first drive to the second for backups. Btw, my sysadmin tells me that he bought 3 4 TiB drives and put it on the card. But during installation, I see only one 4 TiB drive. Is this possible? (These HDDs/SSDs are not RAIDed.) > I was hoping to find something more Fedora centric, but here's the upstream > documentation: > https://github.com/systemd/zram-generator/blob/main/man/zram-generator.conf.md Thanks for this! Best wishes, Ranjan _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
