On Saturday, July 4, 2020 11:27:47 PM MST Alexey Avramov wrote: > >Linux handles low memory situations just fine, but it's much better if you > > have an appropriately sized swap partition and let the kernel do its job > > No, by default Linux can hang at low memory condition. Huge swap space will > not help you if a leak occurs. With a large swap space, the hang can happen > later, but it can still happen. Another point is that the swap space is > slow. With fast leaks and slow swap space, freezing is possible throughout > the entire swap filling time. A typical problem: "once all the ram is used > up the whole system freezes as swap starts getting full, but really the > whole system is completely locked-up. I thought my swapfile was too small > so I made it match my ram (12 GB) but the system still gets frozen" [1]. Sure, swap is slower than RAM. That's fine. We don't need it to be as fast as RAM, that's not what it's for. It's for things that can be swapped out, because it's loaded into memory, but not actively used. RAM doesn't "fill" until long after unused things have been swapped out. > >If you didn't mean for the program to use as much memory as it tried to, > >the correct solution would be to use cgroups. > > > 1. This is not configured by default. > 2. This can be inconvenient even for advanced users. > 3. Quick leaks can happen unexpectedly. What software in the default image leads to low memory issues? Web browsers? If so, there's a simple solution to this. We can put a default cgroup on web browsers so they don't take over the OS. -- John M. Harris, Jr. _______________________________________________ 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
