Date: Thu, 27 Sep 2018 16:01:11 -0600 From: Rebecca Cran <rebecca@bluestop.org> To: FreeBSD Current <freebsd-current@freebsd.org> Subject: 12.0-ALPHA5 - ZFS default ARC max apparently forcing system to run out of memory Message-ID: <f3267619-8706-47d2-7b07-590937bf4df7@bluestop.org>
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I'm running 12.0-ALPHA5 on a laptop which has 32GB RAM and 2GB swap. I've found it running out of memory when building ports via synth: I think I've also seen it when running a buildworld. Johannes on FreeBSDDesktop suggested it might be related to ZFS, and setting vfs.zfs.arc_max to 8GB *does* appear to have resolved the problem. Shortly after running out of memory (with |"swap_pager_getswapspace(32): failed" messages)|, the first few lines of 'top' were: Mem: 4335M Active, 4854M Inact, 7751M Laundry, 9410M Wired, 48K Buf, 5332M Free ARC: 5235M Total, 4169M MFU, 497M MRU, 172K Anon, 97M Header, 471M Other 3479M Compressed, 5930M Uncompressed, 1.70:1 Ratio Swap: 2048M Total, 2009M Used, 39M Free, 98% Inuse I've not seen this happen before on ZFS systems, so is it a regression in 12? -- Rebecca Cran
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