On Tue, Jan 12, 2021 at 6:21 AM Richard Shaw <hobbes1...@gmail.com> wrote: > > On Mon, Jan 11, 2021 at 11:49 PM Chris Murphy <li...@colorremedies.com> wrote: >> >> On Mon, Jan 11, 2021 at 12:57 PM Richard Shaw <hobbes1...@gmail.com> wrote: >> >> > I'm playing around with cryptocurrency and the current one downloads the >> > whole blockchain and it's at 65GB and growing. I think the growing part is >> > the problem. That and it's being stored on /home which is a spinning disk >> > not an SSD like the system disk. >> > >> > I'm seeing a lot of IO wait in glances and the system is sluggish even >> > though CPU and memory usage is relatively low. >> >> It'd be useful to know if this is some kind of database, if it's one >> big file or many, if it's doing insertions (typical with database) or >> append. It might just be busy and will settle itself out once it's >> done downloading. And even maybe know what the program is. And I can >> ask folks on #btrfs. > > > I would think a blockchain is roughly equivalent to a database but I have no > idea if the blocks were downloaded in order (appended) or randomly > (inserted). The single file (data.mdb) ended up being 96GB in total. It seems > to have settled down as I expected but it took about 2 days to download so it > was a bit frustrating using my computer at that time. Anything that tried to > access /home (my spinning btrfs drive) would basically stall including > youtube videos that ran out of cache, browser tabs, etc.
Sounds like that's MariaDB, mysql. Can you post cat /proc/mounts for this file system? > > The program/cryptocurrency is Monero and was downloaded via Flatpack (I > think, could be an Appimage). There are two things to try if anyone wants to reproduce. Change scheduler from bfq to mq-deadline. Swap out the containing directory for a subvolume. Of course, don't do both at the same time. A/B testing ext4 vs Btrfs is also useful. I'll put it on my todo, but it might be a little while before I get to it. -- Chris Murphy _______________________________________________ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org 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@lists.fedoraproject.org
