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[89.241.205.78]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3e18537589dsm11363115f8f.54.2025.09.06.23.13.10 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 06 Sep 2025 23:13:10 -0700 (PDT) Message-ID: Date: Sun, 7 Sep 2025 07:13:10 +0100 List-Id: Packaging the FreeBSD base system List-Archive: https://lists.freebsd.org/archives/freebsd-pkgbase List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-pkgbase@FreeBSD.org MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: pkg upgrade, ZFS, swap on, vm.pageout_oom_seq To: freebsd-pkg@freebsd.org Cc: freebsd-pkgbase@freebsd.org References: <0dbf8c95-7697-4887-a890-335c3ccd80f1@gmail.com> <4e12afdc-7bcf-4a25-94b3-fe1562469ed9@gmail.com> <05351AB0-7BA7-4130-BBEE-CFB793ACFAB4@yahoo.com> From: Graham Perrin Content-Language: en-GB Autocrypt: addr=grahamperrin@gmail.com; keydata= xsFNBGKYt7ABEAClu83dJ3ZKfVgPOk9YKRv0Z+dl2b88+k9R4vwAmElgguYdKE7yhnQNhhWM v9vi6AFrBMc2oJdVHJ2OrXfwpELBFIgiSMEWNsC4e+Z3HtSajcl+pFZsP7ciiSoycj/w3wIV kAZoVGbhyIbNG7fbCEJ8q81TbfsGypV3bRmbZVvGNecBguYiooBtz2Qht1p3itXMkIA6P9pS YDl+6QddZLyUUAjAnFv2QDoYSHLnaDUWw4oONZsB0SKVu8jMIBh4uJZoYEOvdvc9jQQdOpA2 CAgA6ulfm42Ikr9lKBUUCtjqiWAhJ7iXOTyHAIdR4Mf8alCE6tdTq6dHdIt+GktTY7oYNyL2 3aD3C7I5waU0SFXvJcOMG10QLfwYQMOQoYQ9XJ0U5A28WYiDcylDdUWT7SappP1e1ZMeJWWO y14mxxNzHaJSI4rK8P/p5tp3Q7SSC4k5gMh9zKba3K2ApCWNbVLGvXsJeQkZZNvu70tE81ey AHI5iZcB6D7WaHysBUmsKaEpbcmm1ZThTnGL0SHEl5to5Jab5Fg6O+Cnly5sVz5lX/v8Aosx kKNei7SCVqXOVtteQeGxWbXWbhPgbMyc0Gi3DuxBI/yvJ43k/rJysQlLGLWfJx/UXprwLluC PDK9EvKEB+fD1Z349uzp1sKr3ihpySbyKI8fpudftnAz4EsoCwARAQABzSZHcmFoYW0gUGVy cmluIDxncmFoYW1wZXJyaW5AZ21haWwuY29tPsLBlAQTAQoAPhYhBFk/5bLDBwftvJcvCrdn SG9KGNQLBQJoRALAAhsDBQkPEg5ABQsJCAcDBRUKCQgLBRYDAgEAAh4FAheAAAoJELdnSG9K GNQL8YkP/2V1z6XQDyG1QlKAu8TuE8zDWy9QQKjC/G44hlu5zk+2kWSNk4zeExs9ZXOBmVhF EW1d+1J8wDiYIeKYj/rqMoP+gb8o0Au0lSRitvTdLxkZBFGMn0CEzlDOzv+wmiy0ggAV/s+Y EbiHk12fI0LoTy5/ywdmG/uGS7M6p3XOrM0YO1qmLXy1cUyYDsYIpq5/rT0QzpGowsJLoEA3 zz1vfKVY+RTorsL4W8ljXLmcs4c3b3HZG9Xmgtt+Ni/eb9CjzM7kCXOcSMnVzvfscCowPAwB 0ZHlNxNV0MTa61xgvOCk4Zf278ArRgbTm4oOz9Z4ciPMnVue+9P/VdxIxgUuYkAryM0+agGz L9bd8ljn+efNtgZ5dlDLrNnTE+vWnMVlMXgl7BNnhwHg7UYFLrC2xklsICub0qpnNheTGeqo 0N4UongJTQJ6H6LEpgd+KMkCncAHghED/G0/BUdO90VEOoqnIKwKa+F9NqVMvHWc8D58mwCP FghsmxK9FM9pnsjLmG7u+s51Y7++GSRnU4NkI4tHiVk7hcAcvZuc0QbUDwVMTurDUgIqRo6W 80j1tFjEspkrwtMoeVFEkDHktjoc3AoEymXIncZfqIqi3nVseyDVyNByvkV0mutX9hXqac0/ RXMuyK9KniAUZ9+gsWs4rPs/DOdsw4K8/RnjduBrfCYQzsFNBGKYt7ABEADRb1tZuh7DPYET 0wK6fe7owbYgM+RfKhmcrGgR2HI9M2q6+0WKF/ITnggWdIW2Ecc4z2boLz/cwvPGCS7/YxZM 61KklGCwuS7q1s04XnHDWHuFxfXQPzAdVmNO3bYoMZbJjHXs6sB2u5ksiwPwaMAWWaGkviSj c5pwvHCiTmX5vH5CBj/Vi+5ESyX38vK4JM5S/m4ouI/6M9biyFgimV+v3vVyCxJCT1gI9g4o GIh1qq5S433b1fihn4yHPf8XOKyBpA/QcwLONViBqJL5nnOxpsh344rNxn2R7CcRzzicOV+e 2IbMem4lwNWQlZKoRotKXZi9LqN5mynSBYqAUdoZum0QinWT9F22B0Qex5PH1zAt9i2W91Vd kcPB3LwkRXj07ycRtsSzpgPA6fLc6AsoWFslHl8kVOO5eJIA4xhjlPa+W8lguQHZ0iX+5uAv 2eAgXR2swADuHPuENNFStmsgAMl8OOOgtq75yA5TpyIzxMuXV9Nmp0VfIaUM/IdLdmxhc1pC c320l5fYMHVLFAReWEbSj2QH8YzWfpXHIegutWWYEbH9SiDXgS9KoKmCJV/Qa+x6/b8y3pOZ vnIbCDaynC2Yr50s8gRa9kb54JE8Z+p8r16U3SEsK3PtUi0RF0e51danCVHrrE6/Hat2XUO/ 6nnYgVgFOrLao6Gh/VMs8wARAQABwsF8BBgBCgAmFiEEWT/lssMHB+28ly8Kt2dIb0oY1AsF AmhEAsACGwwFCQ8SDkAACgkQt2dIb0oY1AvQxw//REWYFK2m4yS/QP5kzfhkWcNqDI/akGT5 /LXmdmbc1s78+mOMXnA4vBY/+X1QatgxWUECkPDOiIwXJMxoBuyY8e7spLRXeyhtfh5aYaJc MO5bARX0c49v+KfZ80u9tG2rkKQvAt/ySo7OXsbDADFFRhlc8RLbb8e7bSctGbYZk9CYa0ya dW5+n3znDNJ6yW1skx9wTH+Y8VlSazRLk3XgXscNqBA2h56v3WS/R5dI++7AQxZxSQacQvfj 9eahq7ATdB4zMQ9MBHEwOvGD3DLlc55FYSDZvNX+mhnK7S0t1Nt2EtGUOmXb5ysMFGnbsce0 woKQ0sLPF1HWDAAf7tBCF8mpPIzU/ViAkupsJ6NYCD0tLFD8pvl0NYU2TjvyWh6ie3e5B/b3 8Daiyme+M92ivfoRQOFKmkPfeT14AI6OW1k7qFbmoIwMWWQdFWAl1CP9hNdF9gRN4rFB0Jy1 90BajZW2zOdVfqdurJZegCzAowZalLm4JEK2MklpPzipibnJqhLOmvJy587pF52KDdM/4rLy BBREIm7uRivnO5k/BY5qS+H/aqv97LC0PVaTsLXbDmTxTnJplUpdlYT9NGidM+x/ioS0iztO Cht7cT8V8jvvKZYvNpst8iqxuIaoV9V7aZ0wAQpkgDGXHmSzwtz6U8xNf/4e4sLn9KPlldSd kvo= In-Reply-To: <05351AB0-7BA7-4130-BBEE-CFB793ACFAB4@yahoo.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Spamd-Bar: --- X-Spamd-Result: default: False [-4.00 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-1.00)[-1.000]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20230601]; R_SPF_ALLOW(-0.20)[+ip6:2a00:1450:4000::/36]; MIME_GOOD(-0.10)[text/plain]; RCVD_TLS_LAST(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCPT_COUNT_TWO(0.00)[2]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; FREEMAIL_FROM(0.00)[gmail.com]; FROM_HAS_DN(0.00)[]; FREEFALL_USER(0.00)[grahamperrin]; FREEMAIL_ENVFROM(0.00)[gmail.com]; TO_DN_NONE(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; MLMMJ_DEST(0.00)[freebsd-pkg@freebsd.org,freebsd-pkgbase@freebsd.org]; RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; ASN(0.00)[asn:15169, ipnet:2a00:1450::/32, country:US]; RCVD_IN_DNSWL_NONE(0.00)[2a00:1450:4864:20::32d:from] X-Rspamd-Queue-Id: 4cKKWy20SRz3whW On 07/09/2025 05:11, Mark Millard wrote: > On Sep 6, 2025, at 19:10, Graham Perrin wrote: > >> … > … > > So you are saying at this point that the combination for > RAM+SWAP inside the VM is: > > 1 GiByte RAM in VM and 8 GiByte SWAP in that VM as well? Yes. > If yes, that should have produced a warning about potential > mistuning … True. I spent years ignoring the kern.maxswzone warning, partly because I never noticed any adverse effect from ignorance. When set to 16 G on hardware with 32 G RAM, the amount of swap used was sometimes close to the amount available. Today I found the variable in loader_simp(8) under , > … If no value is provided, the system allocates enough memory to > handle an amount of swap that corresponds to eight times the amount of > physical memory present in the system. > > Note that swap metadata can be fragmented, which means that the system > can run out of space before it reaches the theoretical limit.  > Therefore, care should be taken to not configure more swap than > approximately half of the theoretical maximum. > > Running out of space for swap metadata can leave the system in an > unrecoverable state.  Therefore, you should only change this parameter > if you need to greatly extend the KVM reservation for other resources > such as … Without me attempting to perform any calculation: I reckon, I always did well (no unexpected run-out) by _not_ providing a value.