Vincent Lefevre wrote: > The free(1) man page says for "shared": > > shared Memory used (mostly) by tmpfs (Shmem in /proc/meminfo) > > But I get: > > qaa:~> free --human > total used free shared buff/cache > available > Mem: 31Gi 17Gi 1.6Gi 10Gi 21Gi > 13Gi > Swap: 975Mi 16Ki 975Mi > > qaa:~> df --human-readable -t tmpfs > Filesystem Size Used Avail Use% Mounted on > tmpfs 3.2G 3.3M 3.1G 1% /run > tmpfs 16G 0 16G 0% /dev/shm > tmpfs 1.0M 0 1.0M 0% > /run/credentials/systemd-journald.service > tmpfs 1.0M 0 1.0M 0% > /run/credentials/systemd-cryptsetup@nvme0n1p3_crypt.service > tmpfs 16G 60K 16G 1% /tmp > tmpfs 1.0M 0 1.0M 0% /run/credentials/[email protected] > tmpfs 3.2G 44K 3.2G 1% /run/user/1000 > > According to the free(1) man page, the 10Gi for "shared" is > "used (mostly) by tmpfs". But this contradicts the output of > "df --human-readable -t tmpfs".
It can be used by any cooperating processes to send data back and forth between them. The ipcs command shows the memory blocks in use for interprocess communication. -dsr-
