On 2 November 2016 at 21:47, Seth Arnold <[email protected]> wrote: > On Wed, Nov 02, 2016 at 06:26:07PM +0000, Dimitri John Ledkov wrote: >> = Questions = >> >> Is it sensible to change the semantics of the % specification in >> partman-auto? >> Or should e.g. a brand new factor be introduced? >> Is the introduction of pre-seedable swaplimit sensible? >> Is 2GB a good generic upper swaplimit? >> Is hardcoded 2 * 2.5% of disk space a sensible dynamic limit, or >> should that be preseedable as well? > > This proposal feels a little complicated to me. We discussed swap at the > Athens sprint and I wrote down what I remembered from the discussion: > > https://bugs.launchpad.net/ubuntu/+source/debian-installer/+bug/1566129/comments/3 > > In short: > - Use swap files > - Perhaps in a directory, so someone can just dd a new file alongside > existing ones for additional swap space if locally required > - One gigabyte is very useful and not too painful > > Obviously cloud guests with e.g. 10 gig roots can probably not afford > an entire gigabyte for swap, so scaling down in this case may still > be useful.
However, there are filesystems that cannot support swapfiles. For example btrfs. As far as I understand, swap performance is better on swap formatted lvm volume, than a swapfile on a filesystem on an lvm volume. 1GB swapfile is indeed expensive on a 10GB rootfs, hence I am hoping to have a smaller swapfile on really small rootfs. E.g. 1GB swapfile, but no more than 5% of disk space is simple enough. no? Are you saying that 2GB is too big, and just do 1GB everywhere will do, and offer a preseed key to set the size if one wants to change it? (Or disable out right) -- Regards, Dimitri. -- ubuntu-devel mailing list [email protected] Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel
