On Wed, Mar 16, 2022 at 11:26 AM Ivan Babrou <ivan@xxxxxxxxxxxxxx> wrote: > I'm making an internal build and will push it to some location to see > how it behaves, but it might take a few days to get any sort of > confidence in the results (unless it breaks immediately). > > I've also pushed my patch that disables SWP_SYNCHRONOUS_IO to a few > locations yesterday to see how it fares. I have some updates before the weekend. There are two experimental groups: * My patch that removes the SWP_SYNCHRONOUS_IO flag. There are 704 machines in this group across 5 datacenters with cumulative uptime of 916 days. * Minchan's patch to remove swap_slot_free_notify. There are 376 machines in this group across 3 datacenters with cumulative uptime of 240 days. Our machines take a couple of hours to start swapping anything after boot, and I discounted these two hours from the cumulative uptime. Neither of these two groups experienced unexpected coredumps or rocksdb corruptions. I think at this point it's reasonable to proceed with Minchan's patch (including a backport).
