On Fri, 2022-09-02 at 22:43 +0200, Fabio Valentini wrote: > On Thu, Sep 1, 2022 at 8:02 PM Demi Marie Obenour <demiobenour@xxxxxxxxx> wrote: > > > > On 9/1/22 13:47, Jaroslav Mracek wrote: > > > With loading or not loading file list it is not so easy or in general - performance optimization is allways a trade one resource for another one or for some features. DNF5 will provide a setting to not load file list, as well to not create disk cache, or not using zchunk (already implemented in DNF). How it can help? It allows to trade download for disk space and CPU, or RAM for HDD, or RAM, HDD, CPU for features. And each user prefers or requires different different things. > > > > > > Without file lists there will be not available some functionality: > > > 1 dnf install/repoquery/whatprovides <file outside of /etc and /usr/(s)bin> => will not work > > > 2. resolve transaction can fail - keep in mind that people are not only using packages from Fedora distribution. > > > > From my perspective, the main problem here is that DNF (possibly via > > libsolv) loads all metadata into memory, instead of only the parts > > it actually needs. This should not be necessary, and I consider it > > a significant limitation of DNF. > > I wonder, would it be better for memory-constrained systems to memmap > (and possibly uncompress on disk before doing that, if necessary) > repository data instead of loading it into memory directly? Or is the > limitation not the size of the repository data itself, but the > in-memory data structures that are generated *from* it? Before this goes too far into the weeds, please remember DNF is already being revised to do this a lot better. The numbers about that are in the original bug report. Whenever DNF 5 lands in Fedora, the problem should get a lot smaller. -- Adam Williamson Fedora QA IRC: adamw | Twitter: adamw_ha https://www.happyassassin.net _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-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/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
