所有正在运行的进程和已用内存的总和不相加。应该使用了大约 10GB，但使用交换区后却是 33GB。我错过了什么以及记忆去哪儿了？
顶部-n1-b-o“％MEM”
top - 14:12:13 up 4 days, 14:34, 1 user, load average: 2.88, 1.68, 1.40
Tasks: 475 total, 1 running, 473 sleeping, 0 stopped, 1 zombie
%Cpu(s): 2.7 us, 2.0 sy, 0.0 ni, 94.5 id, 0.0 wa, 0.4 hi, 0.4 si, 0.0 st
MiB Mem : 15720.5 total, 240.2 free, 12496.3 used, 2984.0 buff/cache
MiB Swap: 40960.0 total, 29546.3 free, 11413.7 used. 1585.2 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
420661 aleksan+ 20 0 9976208 2.8g 9232 S 53.3 18.0 57:12.01 qemu-sy+
194572 aleksan+ 20 0 14.1g 2.3g 2064 S 0.0 14.9 64:40.09 java
420783 aleksan+ 20 0 4097980 856672 62712 S 0.0 5.3 6:51.14 Isolate+
422028 aleksan+ 20 0 267.5g 599920 178416 S 0.0 3.7 6:08.70 Rider.B+
434079 aleksan+ 20 0 3192940 412608 96276 S 0.0 2.6 0:33.46 Isolate+
407972 aleksan+ 20 0 8830056 385000 120472 S 0.0 2.4 11:59.39 firefox
179359 aleksan+ 20 0 1129.1g 261820 60924 S 0.0 1.6 38:42.86 slack
自由-g
total used free shared buff/cache available
Mem: 15 12 0 1 2 1
Swap: 39 11 28
df-h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 4.0M 0 4.0M 0% /dev
tmpfs 7.7G 39M 7.7G 1% /dev/shm
tmpfs 3.1G 2.6M 3.1G 1% /run
/dev/nvme0n1p4 444G 166G 276G 38% /
tmpfs 7.7G 15M 7.7G 1% /tmp
/dev/nvme0n1p4 444G 166G 276G 38% /home
/dev/nvme0n1p2 974M 273M 634M 31% /boot
/dev/nvme0n1p1 599M 29M 571M 5% /boot/efi
tmpfs 1.6G 716K 1.6G 1% /run/user/1000
/dev/nvme0n1p4 444G 166G 276G 38% /run/timeshift/backup
猫 /proc/meminfo
MemTotal: 16097796 kB
MemFree: 175784 kB
MemAvailable: 1247900 kB
Buffers: 56 kB
Cached: 2442848 kB
SwapCached: 1709900 kB
Active: 6085628 kB
Inactive: 6024496 kB
Active(anon): 5282164 kB
Inactive(anon): 5705444 kB
Active(file): 803464 kB
Inactive(file): 319052 kB
Unevictable: 65308 kB
Mlocked: 5908 kB
SwapTotal: 41943032 kB
SwapFree: 30263284 kB
Zswap: 0 kB
Zswapped: 0 kB
Dirty: 2044 kB
Writeback: 0 kB
AnonPages: 9666652 kB
Mapped: 681552 kB
Shmem: 1315408 kB
KReclaimable: 291168 kB
Slab: 615504 kB
SReclaimable: 291168 kB
SUnreclaim: 324336 kB
KernelStack: 41520 kB
PageTables: 120196 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 49991928 kB
Committed_AS: 34806112 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 127080 kB
VmallocChunk: 0 kB
Percpu: 20416 kB
HardwareCorrupted: 0 kB
AnonHugePages: 161792 kB
ShmemHugePages: 192512 kB
ShmemPmdMapped: 0 kB
FileHugePages: 0 kB
FilePmdMapped: 0 kB
CmaTotal: 0 kB
CmaFree: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
Hugetlb: 0 kB
DirectMap4k: 332800 kB
DirectMap2M: 9873408 kB
DirectMap1G: 6291456 kB