On Tue 05-06-18 13:03:29, Andrew Morton wrote: [...] > > As for why we would do something silly as dropping the caches every hour (in a > > cronjob), we started doing this recently because after kernel 4.4, we got > > frequent OOM kills despite having gigabytes of available memory (e.g. 12GB in > > use, 20GB page cache and 16GB empty swap and bang, mysql gets killed). We found > > that that the debian 4.9 kernel is unusable, and 4.14 works, *iff* we use the > > above as an hourly cron job, so we did that, and afterwards run into > > rtorrent/journald corruption issues. Without the echo in place, mysql usually > > gets oom-killed after a few days of uptime. Do you have any oom reports to share? -- Michal Hocko SUSE Labs
