Date: Wed, 24 Feb 2021 13:38:17 +0100 From: Thierry Thomas <thierry@freebsd.org> To: freebsd-hackers@freebsd.org Subject: Re: The out-of-swap killer makes poor choices Message-ID: <YDZIuXCgcpbvm57d@graf.pompo.net> In-Reply-To: <1984125.0OzZcVfBr4@ravel> References: <CAOtMX2jYmrK7ftx62_NEfNCWS7O=giHKL1p9kXCqq1t5E1arxA@mail.gmail.com> <CAOtMX2i3Njo=KBP=99_G0%2BKuSa00CVgNvacmzhTaoZUYEhwPPA@mail.gmail.com> <YDYyQ1V/hEAGV%2ByJ@kib.kiev.ua> <1984125.0OzZcVfBr4@ravel>
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[-- Attachment #1 --] Le mer. 24 févr. 21 à 13:02:14 +0100, Olivier Certner <olivier.freebsd@free.fr> écrivait : > Hi, Hello, > 2 to 3 years ago, I stumbled against production problems on servers doing > heavy computations. Only a few processes (2 generally) were doing them, and > most of the time consumed less than 1/4 of the available RAM (2 GiB). Apart > from that, no other process was allocating any significant amount of memory. > Only some base default daemons (syslogd, cron) and sshd were running. > Occasionally, very big jobs would come, and one or more of these processes > would start eating up all available memory, until FreeBSD decided that it was > time to take action. For such cases, another solution exists on Linux to dynamically enlarge the swap partition (something like dphys-swapfile or SwapSpace - see <https://github.com/Tookmund/Swapspace>; ), but I do not know if such a tool exists on FreeBSD? -- Th. Thomas. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iQJ8BAEBCgBmBQJgNki5XxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRFNTM2QkU4NTM4NTM5OUQwMEI2RkFBNzZG MUM1MTZCM0M4MzU5NzUzAAoJEPHFFrPINZdTs7MP/1iAVsZAtvst8Y+1x8XqYYbD FwAbLh6xIvkRZYOfmnSARDR4/2ZN+F7ixoX30CnjtNSxaw/z1199HRlNpFlhDQDi Fc1PZyF55Z3NmHPelhlNuUPRlIcGHxP0V4bu1/RLgqX7EkdUjGbPJnTPeH7Ws2jG VAGdMBuaaL8ZehZlyTp5J7mGShWJQV3kH/7KvnNL4UZKSNUtpXe9sbeSwF78xu/r twvgRKk//7731ZMi4jwaWqHgAneCoXA4d9DHLFMnwAC4Og9r+KCHlTuE0DpE9zCB EHcXShTdcl+h3I7aALI2D4m3Xkd+t8q7nnNaCKPlE+KeFTOhstB31u+aWdDd1UBn /XioAYx4prGMxoZTuFPlYhxPUO9r6n/AUhMgLouNlq3uS9krncz5E6w3aeuLvEG4 4ipYkGlu60iRKrX9x8ZMltBVEZ6sO74AdT2Tr5v/Y88TBhiWicymSlBvSDKBeQnb DkuQSBInb6SOYkooIQbQfxyjopQQ37UvWg/UqM/FXwJgl/UtlbKzVaaDZWfIPfZB QAJqKkcMKW02PCXauFgrcszrfkiGKARoB6SkCZjJW38ldCUTO9LbZOEPekRedAi8 r6tacc+66BodRcpwQPDNSNu48ZGfomEbeOyaD5CJeb2uzUOLapAXhTLLrhL9ymhe H6jqFUWx2jt4qulg+Ezd =3+8/ -----END PGP SIGNATURE-----
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