On Mon, Oct 8, 2018 at 2:39 PM Robert Moskowitz <rgm@xxxxxxxxxxxxxxx> wrote: > > > > On 10/6/18 7:36 AM, Peter Robinson wrote: > > On Fri, Oct 5, 2018 at 10:20 PM Robert Moskowitz <rgm@xxxxxxxxxxxxxxx> wrote: > >> > >> > >> On 10/5/18 2:54 PM, Peter Robinson wrote: > >> > >>>> One difference I note is F28 has a swap partition, F29 does not. Now > >>>> during the initial stuff, no swap was used. Now I see 29KB of swap used > >>>> with 86KB memory free. > >>> So we use zram for swap in F-29, it preserves the mSD card due to > >>> wear, and is much faster, this isn't the problem. Basically up to a > >>> max of 50% of the RAM will be allocated to swap using lz4 compression > >>> and we generally see a 4-5 times compression ratio. > >> How can I 'see' my swap partition? Free shows a 487304B swap with none > >> used. Yet. > >> > >> Nothing in fstab. Guess I better read up on zram. > > It's created as part of the zram-swap service. The swapon (no options) > > will show swap details, the zramctl cmd (no options) will show you > > size, utiliation, compression ratios etc. > > > > > > OK. I took a look at the output of these commands and how zram is > running as a service. > > Pretty neat, overall. > > Though I saw where that system start date may play a longterm problem: > > cat /etc/zram.conf > # The factor is the percentage of total system RAM to allocate to the > ZRAM block device(s). > FACTOR=2 > > # cat /etc/systemd/system/swap.target.wants/zram-swap.service > [Unit] > Description=Enable compressed swap in memory using zram > DefaultDependencies=no > Before=swap.target > > [Service] > Type=oneshot > RemainAfterExit=yes > TimeoutStartSec=30sec > ExecStart=/usr/sbin/zramstart > ExecStop=/usr/sbin/zramstop > > [Install] > WantedBy=swap.target > > # systemctl -l --no-pager status zram-swap > \u25cf zram-swap.service - Enable compressed swap in memory using zram > Loaded: loaded (/usr/lib/systemd/system/zram-swap.service; enabled; > vendor preset: disabled) > Active: active (exited) since Fri 2018-06-22 11:12:12 EDT; 3 months > 16 days ago > Process: 437 ExecStart=/usr/sbin/zramstart (code=exited, > status=0/SUCCESS) > Main PID: 437 (code=exited, status=0/SUCCESS) > > Jun 22 11:12:12 localhost zramstart[437]: Setting up swapspace version > 1, size = 475.9 MiB (498999296 bytes) > Jun 22 11:12:12 localhost zramstart[437]: no label, > UUID=ba3bf62f-7bb0-4295-ad8c-2d26b000c3f8 > Jun 22 11:12:12 localhost zramstart[437]: Activated ZRAM swap device of > 499 MB > Jun 22 11:12:12 localhost systemd[1]: Started Enable compressed swap in > memory using zram. > > Active for 3 months and 16 days? Hardly. :) > > Perhaps for F30, you can grab the timestamp of the Chrony drift file for > the startup rather than whereever you get this Jun 22 date? It's probably the date the image was created. Patches are welcome! _______________________________________________ arm mailing list -- arm@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to arm-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/arm@xxxxxxxxxxxxxxxxxxxxxxx
