Date: Thu, 28 Nov 2024 21:25:19 -0500 From: Dennis Clarke <dclarke@blastwave.org> To: Current FreeBSD <freebsd-current@freebsd.org> Subject: top seems confused about memory ? Message-ID: <64c81235-7871-4c44-bef2-95210f12bf86@blastwave.org>
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On a machine here I see top reports this with " top -CSITa -s 10" last pid: 6680; load averages: 0.29, 0.12, 0 up 0+11:40:46 02:23:01 51 processes: 2 running, 47 sleeping, 2 waiting CPU: 0.6% user, 0.0% nice, 0.2% system, 0.0% interrupt, 99.2% idle Mem: 587M Active, 480G Inact, 1332K Laundry, 7410M Wired, 456M Buf, 11G Free ARC: 3624M Total, 85M MFU, 3359M MRU, 32M Anon, 118M Header, 27M Other 2919M Compressed, 32G Uncompressed, 11.13:1 Ratio Swap: 32G Total, 32G Free THR USERNAME THR PRI NICE SIZE RES STATE C TIME CPU COMMAND 100003 root 40 187 ki31 0B 640K CPU0 0 464.8H 3967.69% [idle] 101142 root 1 48 0 1530M 574M piperd 34 0:27 24.69% /usr/lo 100000 root 731 -16 - 0B 11M parked 18 112:10 3.14% [kernel 102993 root 1 21 0 30M 15M select 26 0:03 2.77% /usr/bi Seems only 11G of memory is free ? That seems impossible. titan# sysctl hw.physmem hw.physmem: 549599244288 titan# titan# titan# sysctl -a | grep 'free' | grep 'mem' vm.uma.vmem.stats.frees: 0 vm.uma.vmem.keg.domain.1.free_slabs: 0 vm.uma.vmem.keg.domain.1.free_items: 0 vm.uma.vmem.keg.domain.0.free_slabs: 0 vm.uma.vmem.keg.domain.0.free_items: 0 vm.uma.vmem_btag.stats.frees: 523236 vm.uma.vmem_btag.keg.domain.1.free_slabs: 0 vm.uma.vmem_btag.keg.domain.1.free_items: 34398 vm.uma.vmem_btag.keg.domain.0.free_slabs: 0 vm.uma.vmem_btag.keg.domain.0.free_items: 34378 vm.kmem_map_free: 528152154112 kstat.zfs.misc.arcstats.memory_free_bytes: 11707904000 titan# I have no idea what "top" is reporting but 11G free on a machine doing nothing seems ... unlikely. -- -- Dennis Clarke RISC-V/SPARC/PPC/ARM/CISC UNIX and Linux spoken
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