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  • When my system starts using swap space, I've already given up all hopes of a decently running system, so IMHO this particular "bug" doesn't matter much.

    I'm being downvoted, but honestly, is anyone always testing their software while swap is active?

    by amelius
  • A GC latency SLO should include operating-system memory pressure. Otherwise, a page-fault problem will look like a collector problem and lead to the wrong fix.
    by soltanov
  • I started wondering if there could be swap-aware GC, like first make the required page swapped in (not that there's any obvious API for that...) and only then pause the world?
    by Gabrys1
  • Choosing a language that forgives bad memory management practices and promotes sloppy programming practices is your decision. Don't be surprised that it has to do its job. You could have chosen modern C++ or Rust and use RAII and proper automatic deallocation.
    by HackerThemAll
  • I use Go where i'd use Node, Ruby or Python.

    I use Rust where i need low latency.

    by faangguyindia
  • "It hurts when I do this"

    "Stop doing that"

    If you care about latency, disable swap. System wide or for the specific the cgroup.

    by jacobgold
  • Discord learned this back in 2020 and published a great blog post on it: https://discord.com/blog/why-discord-is-switching-from-go-to...
    by xavdid
  • Unfortunately that's somewhat expected - regardless of implementation, the sole fact that the GC needs to somehow walk the entire tree to trace still referenced sections makes swap highly impractical -- even if you had not had 40ms stop-the-world pauses the LRU cache used by swap would get thrown away at every GC.

    I believe that's actually the same reason why Apple stopped using GC in their frameworks in favour of automatic reference counting.

    by nasretdinov

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