BASH – Memoria RAM e SWAP viste da Ubuntu
BASH – Memoria RAM e SWAP viste da Ubuntu – Aggiornamento anno 2024.
Onde evitare inutili allarmismi, si precisa che le recenti distribuzioni di Linux possono funzionare bene anche in assenza di partizione di SWAP, in quanto sono in grado di creare un apposito file-dati che ne fa le veci.
sudo inxi -Smjxxx # Visualizza Sistema Operativo, Memoria RAM e SWAP
free # Visualizza memoria RAM e SWAP presenti nel Computer
dmesg|egrep RAM # Verifica che la memoria RAM sia vista correttamente dal Sistema Operativo
dmesg|egrep -i swap # Verifica che la partizione SWAP sia stata montata correttamente
Esempi di output:
:~$ sudo inxi -Smjxxx # Visualizza Sistema Operativo, Memoria RAM e SWAP [sudo] password di ubuntustudio22k04: System: Host: ubuntustudio22k04-X555YI Kernel: 5.15.0-92-lowlatency x86_64 bits: 64 compiler: gcc v: 11.4.0 Desktop: KDE Plasma 5.24.7 wm: kwin_x11 dm: SDDM Distro: Ubuntu 22.04.3 LTS (Jammy Jellyfish) Memory: RAM: total: 6.69 GiB used: 2.33 GiB (34.8%) Array-1: capacity: 8 GiB slots: 2 EC: None max-module-size: 4 GiB note: est. Device-1: DIMM 0 size: 4 GiB speed: 1600 MT/s type: DDR3 detail: synchronous unbuffered (unregistered) bus-width: 64 bits total: 64 bits manufacturer: Hynix/Hyundai part-no: HMT451S6BFR8A-PB serial: 0A54693B Device-2: DIMM 1 size: 4 GiB speed: 1600 MT/s type: DDR3 detail: synchronous unbuffered (unregistered) bus-width: 64 bits total: 64 bits manufacturer: Hynix/Hyundai part-no: HMT451S6CFR6A-PB serial: N/A Swap: ID-1: swap-1 type: partition size: 4.42 GiB used: 0 KiB (0.0%) priority: -2 dev: /dev/sda14 :~$ free # Visualizza memoria RAM e SWAP presenti nel Computer totale utilizzato buff/cache condivisa libera disponibile Mem: 7019904 1996408 2066804 49596 2956692 4692204 Swap: 4635644 0 4635644 :~$ dmesg|egrep RAM # Verifica che la memoria RAM sia vista correttamente dal Sistema Operativo [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] extended physical RAM map: [ 0.000941] total RAM covered: 2288M [ 0.001479] gran_size: 64K chunk_size: 32M num_reg: 3 lose cover RAM: 0G [ 0.012122] RAMDISK: [mem 0x81f0c000-0x88859fff] [ 0.412261] e820: reserve RAM buffer [mem 0x81ee0018-0x83ffffff] [ 0.412272] e820: reserve RAM buffer [mem 0x81eee018-0x83ffffff] [ 0.412275] e820: reserve RAM buffer [mem 0x81ef6018-0x83ffffff] [ 0.412277] e820: reserve RAM buffer [mem 0x8a9d1000-0x8bffffff] [ 0.412280] e820: reserve RAM buffer [mem 0x8bb75000-0x8bffffff] [ 0.412282] e820: reserve RAM buffer [mem 0x8c0e0000-0x8fffffff] [ 0.412285] e820: reserve RAM buffer [mem 0x8e067000-0x8fffffff] [ 0.412287] e820: reserve RAM buffer [mem 0x8e999000-0x8fffffff] [ 0.412290] e820: reserve RAM buffer [mem 0x8f000000-0x8fffffff] [ 0.412292] e820: reserve RAM buffer [mem 0x22f000000-0x22fffffff] [ 3.264140] radeon 0000:00:01.0: VRAM: 1024M 0x0000000000000000 - 0x000000003FFFFFFF (1024M used) [ 3.264171] [drm] Detected VRAM RAM=1024M, BAR=256M [ 3.264176] [drm] RAM width 128bits DDR [ 3.264270] [drm] radeon: 1024M of VRAM memory ready [ 5.931569] radeon 0000:01:00.0: VRAM: 2048M 0x0000000000000000 - 0x000000007FFFFFFF (2048M used) [ 5.931584] [drm] Detected VRAM RAM=2048M, BAR=256M [ 5.931586] [drm] RAM width 64bits DDR [ 5.931607] [drm] radeon: 2048M of VRAM memory ready :~$ dmesg|egrep -i swap # Verifica che la partizione SWAP sia stata montata correttamente [ 0.182945] Spectre V1 : Mitigation: usercopy/swapgs barriers and __user pointer sanitization [ 2.002367] zswap: loaded using pool lzo/zbud [ 31.199315] Adding 4635644k swap on /dev/sda14. Priority:-2 extents:1 across:4635644k FS :~$