Hi.
While installing and using Xen on my two PCs, I see that the dom0 is still running out of memory on one PC.
I installed Xen in the same way (with same kernel version and same xen version) on the computers.
But on one computer
(labeled A), there is no problem, and on the other computer
(labeled B),
huge amounts of file page is consumed:
# /proc/meminfo of A
MemTotal: 7545164 kB
MemFree: 6275968 kB
MemAvailable: 7039388 kB
Buffers: 43644 kB
Cached: 937928 kB
SwapCached: 0 kB
Active: 282972 kB
Inactive: 832036 kB
Active(anon): 134564 kB
Inactive(anon): 92720 kB
Active(file): 148408 kB
Inactive(file): 739316 kB
Unevictable: 36 kB
Mlocked: 36 kB
SwapTotal: 3999740 kB
SwapFree: 3999740 kB
Dirty: 148 kB
Writeback: 4 kB
AnonPages: 133472 kB
Mapped: 169608 kB
Shmem: 93848 kB
Slab: 66384 kB
SReclaimable: 37684 kB
SUnreclaim: 28700 kB
KernelStack: 4992 kB
PageTables: 15828 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 7772320 kB
Committed_AS: 1461720 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 0 kB
VmallocChunk: 0 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
ShmemHugePages: 0 kB
ShmemPmdMapped: 0 kB
CmaTotal: 0 kB
CmaFree: 0 kB
DirectMap4k: 16639964 kB
DirectMap2M: 0 kB
# /proc/meminfo of B
MemTotal: 7487512 kB
MemFree: 138888 kB
MemAvailable: 6130396 kB
Buffers: 100832 kB
Cached: 6227632 kB
SwapCached: 0 kB
Active: 4613668 kB
Inactive: 2308416 kB
Active(anon): 491464 kB
Inactive(anon): 545104 kB
Active(file): 4122204 kB
Inactive(file): 1763312 kB
Unevictable: 364 kB
Mlocked: 364 kB
SwapTotal: 1999868 kB
SwapFree: 1999868 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 594004 kB
Mapped: 238460 kB
Shmem: 442948 kB
Slab: 320832 kB
SReclaimable: 283608 kB
SUnreclaim: 37224 kB
KernelStack: 7440 kB
PageTables: 29660 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 5743624 kB
Committed_AS: 3780332 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 0 kB
VmallocChunk: 0 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
ShmemHugePages: 0 kB
ShmemPmdMapped: 0 kB
CmaTotal: 0 kB
CmaFree: 0 kB
DirectMap4k: 16635236 kB
DirectMap2M: 0 kB
The two computers have the same parts except for the CPU (A: Intel i7 7700, B:
Intel i7 6700).
I've used 'top' to see which process is using a lot of memory, but there is no process at a glance:
# top of A
PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command
4640 nickeys 20 0 1333M 95952 27952 S 0.0 1.3 0:00.00 /usr/bin/gnome-software --gapplication-service
4641 nickeys 20 0 1333M 95952 27952 S 0.0 1.3 0:00.00 /usr/bin/gnome-software --gapplication-service
4653 nickeys 20 0 1333M 95952 27952 S 0.0 1.3 0:00.00 /usr/bin/gnome-software --gapplication-service
4628 nickeys 20 0 1333M 95952 27952 S 17.4 1.3 0:05.00 /usr/bin/gnome-software --gapplication-service
4841 nickeys 20 0 1333M 95952 27952 S 0.0 1.3 0:00.00 /usr/bin/gnome-software --gapplication-service
4509 nickeys 20 0 1213M 16716 14224 S 0.0 0.2 0:00.00 /usr/lib/x86_64-linux-gnu/indicator-datetime/indicator-datetime-service
4510 nickeys 20 0 1213M 16716 14224 S 0.0 0.2 0:00.00 /usr/lib/x86_64-linux-gnu/indicator-datetime/indicator-datetime-service
4512 nickeys 20 0 1213M 16716 14224 S 0.0 0.2 0:00.00 /usr/lib/x86_64-linux-gnu/indicator-datetime/indicator-datetime-service
4517 nickeys 20 0 1213M 16716 14224 S 0.0 0.2 0:00.00 /usr/lib/x86_64-linux-gnu/indicator-datetime/indicator-datetime-service
4596 nickeys 20 0 1213M 16716 14224 S 0.0 0.2 0:00.00 /usr/lib/x86_64-linux-gnu/indicator-datetime/indicator-datetime-service
4745 nickeys 20 0 1213M 16716 14224 S 0.0 0.2 0:00.00 /usr/lib/x86_64-linux-gnu/indicator-datetime/indicator-datetime-service
4489 nickeys 20 0 1213M 16716 14224 S 0.0 0.2 0:00.03 /usr/lib/x86_64-linux-gnu/indicator-datetime/indicator-datetime-service
4671 nickeys 20 0 1176M 56192 47080 S 0.0 0.7 0:00.00 nautilus -n
4672 nickeys 20 0 1176M 56192 47080 S 0.0 0.7 0:00.01 nautilus -n
4743 nickeys 20 0 1176M 56192 47080 S 0.0 0.7 0:00.00 nautilus -n
4759 nickeys 20 0 1176M 56192 47080 S 0.0 0.7 0:00.00 nautilus -n
4639 nickeys 20 0 1176M 56192 47080 S 0.0 0.7 0:01.26 nautilus -n
4576 nickeys 20 0 1117M 94904 58404 S 0.0 1.3 0:00.00 compiz
4578 nickeys 20 0 1117M 94904 58404 S 0.0 1.3 0:00.00 compiz
4580 nickeys 20 0 1117M 94904 58404 S 0.0 1.3 0:00.04 compiz
4800 nickeys 20 0 1117M 94904 58404 S 0.0 1.3 0:00.00 compiz
4553 nickeys 20 0 1117M 94904 58404 S 0.0 1.3 0:01.57 compiz
4675 nickeys 20 0 918M 49860 13484 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x3 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/
4676 nickeys 20 0 918M 49860 13484 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x3 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/
4677 nickeys 20 0 918M 49860 13484 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x3 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/
4678 nickeys 20 0 918M 49860 13484 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x3 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/
4754 nickeys 20 0 918M 49860 13484 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x3 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/
4663 nickeys 20 0 918M 49860 13484 S 0.0 0.7 0:00.05 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x3 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/
4450 nickeys 20 0 907M 33816 25952 S 0.0 0.4 0:00.00 /usr/lib/unity-settings-daemon/unity-settings-daemon
4451 nickeys 20 0 907M 33816 25952 S 0.0 0.4 0:00.00 /usr/lib/unity-settings-daemon/unity-settings-daemon
4454 nickeys 20 0 907M 33816 25952 S 0.0 0.4 0:00.03 /usr/lib/unity-settings-daemon/unity-settings-daemon
4789 nickeys 20 0 907M 33816 25952 S 0.0 0.4 0:00.00 /usr/lib/unity-settings-daemon/unity-settings-daemon
4446 nickeys 20 0 907M 33816 25952 S 0.0 0.4 0:00.62 /usr/lib/unity-settings-daemon/unity-settings-daemon
4613 nickeys 20 0 844M 60032 22120 S 0.0 0.8 0:00.00 /usr/lib/evolution/evolution-calendar-factory
4617 nickeys 20 0 844M 60032 22120 S 0.0 0.8 0:00.00 /usr/lib/evolution/evolution-calendar-factory
4618 nickeys 20 0 844M 60032 22120 S 0.0 0.8 0:00.00 /usr/lib/evolution/evolution-calendar-factory
4619 nickeys 20 0 844M 60032 22120 S 0.0 0.8 0:00.00 /usr/lib/evolution/evolution-calendar-factory
4598 nickeys 20 0 844M 60032 22120 S 0.0 0.8 0:00.15 /usr/lib/evolution/evolution-calendar-factory
4704 nickeys 20 0 829M 17424 14968 S 0.0 0.2 0:00.00 /usr/lib/evolution/evolution-addressbook-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.AddressBookx4665x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Ba
4705 nickeys 20 0 829M 17424 14968 S 0.0 0.2 0:00.00 /usr/lib/evolution/evolution-addressbook-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.AddressBookx4665x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Ba
4706 nickeys 20 0 829M 17424 14968 S 0.0 0.2 0:00.00 /usr/lib/evolution/evolution-addressbook-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.AddressBookx4665x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Ba
4707 nickeys 20 0 829M 17424 14968 S 0.0 0.2 0:00.00 /usr/lib/evolution/evolution-addressbook-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.AddressBookx4665x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Ba
4708 nickeys 20 0 829M 17424 14968 S 0.0 0.2 0:00.00 /usr/lib/evolution/evolution-addressbook-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.AddressBookx4665x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Ba
4702 nickeys 20 0 829M 17424 14968 S 0.0 0.2 0:00.02 /usr/lib/evolution/evolution-addressbook-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.AddressBookx4665x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Ba
4630 nickeys 20 0 790M 50200 13888 S 0.0 0.7 0:00.03 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
4631 nickeys 20 0 790M 50200 13888 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
4632 nickeys 20 0 790M 50200 13888 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
4633 nickeys 20 0 790M 50200 13888 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
4642 nickeys 20 0 790M 50200 13888 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
4658 nickeys 20 0 790M 50200 13888 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
4661 nickeys 20 0 790M 50200 13888 S 0.0 0.7 0:00.01 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
4627 nickeys 20 0 790M 50200 13888 S 0.0 0.7 0:00.39 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx4598x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
4536 nickeys 20 0 720M 11844 9224 S 0.0 0.2 0:00.00 /usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service
4538 nickeys 20 0 720M 11844 9224 S 0.0 0.2 0:00.00 /usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service
4540 nickeys 20 0 720M 11844 9224 S 0.0 0.2 0:00.00 /usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service
4500 nickeys 20 0 720M 11844 9224 S 0.0 0.2 0:00.19 /usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service
4467 nickeys 20 0 704M 32408 26548 S 0.0 0.4 0:00.00 /usr/lib/x86_64-linux-gnu/unity/unity-panel-service
4468 nickeys 20 0 704M 32408 26548 S 0.0 0.4 0:00.00 /usr/lib/x86_64-linux-gnu/unity/unity-panel-service
4469 nickeys 20 0 704M 32408 26548 S 0.0 0.4 0:00.03 /usr/lib/x86_64-linux-gnu/unity/unity-panel-service
4476 nickeys 20 0 704M 32408 26548 S 0.0 0.4 0:00.00 /usr/lib/x86_64-linux-gnu/unity/unity-panel-service
4460 nickeys 20 0 704M 32408 26548 S 0.0 0.4 0:00.23 /usr/lib/x86_64-linux-gnu/unity/unity-panel-service
4670 nickeys 20 0 675M 18512 15780 S 0.0 0.2 0:00.00 /usr/lib/evolution/evolution-addressbook-factory
4692 nickeys 20 0 675M 18512 15780 S 0.0 0.2 0:00.00 /usr/lib/evolution/evolution-addressbook-factory
4693 nickeys 20 0 675M 18512 15780 S 0.0 0.2 0:00.00 /usr/lib/evolution/evolution-addressbook-factory
4695 nickeys 20 0 675M 18512 15780 S 0.0 0.2 0:00.00 /usr/lib/evolution/evolution-addressbook-factory
4665 nickeys 20 0 675M 18512 15780 S 0.0 0.2 0:00.20 /usr/lib/evolution/evolution-addressbook-factory
4579 nickeys 20 0 666M 38112 33120 S 0.0 0.5 0:00.00 /usr/lib/x86_64-linux-gnu/hud/hud-service
4581 nickeys 20 0 666M 38112 33120 S 0.0 0.5 0:00.00 /usr/lib/x86_64-linux-gnu/hud/hud-service
4582 nickeys 20 0 666M 38112 33120 S 0.0 0.5 0:00.01 /usr/lib/x86_64-linux-gnu/hud/hud-service
4444 nickeys 20 0 666M 38112 33120 S 0.0 0.5 0:00.18 /usr/lib/x86_64-linux-gnu/hud/hud-service
4636 nickeys 20 0 649M 33508 28244 S 0.0 0.4 0:00.00 nm-applet
4637 nickeys 20 0 649M 33508 28244 S 0.0 0.4 0:00.00 nm-applet
4638 nickeys 20 0 649M 33508 28244 S 0.0 0.4 0:00.00 nm-applet
4659 nickeys 20 0 649M 33508 28244 S 0.0 0.4 0:00.00 nm-applet
# top of B
1077 root 20 0 476M 108M 88568 S 0.0 1.5 0:00.00 /usr/lib/xorg/Xorg -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
1018 root 20 0 476M 108M 88568 S 6.0 1.5 16:59.46 /usr/lib/xorg/Xorg -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
3766 nickeys 20 0 1332M 98M 27556 S 0.0 1.3 0:00.08 /usr/bin/gnome-software --gapplication-service
3767 nickeys 20 0 1332M 98M 27556 S 0.0 1.3 0:00.13 /usr/bin/gnome-software --gapplication-service
3768 nickeys 20 0 1332M 98M 27556 S 0.0 1.3 0:00.01 /usr/bin/gnome-software --gapplication-service
3741 nickeys 20 0 1332M 98M 27556 S 0.0 1.3 0:08.74 /usr/bin/gnome-software --gapplication-service
3597 nickeys 20 0 1180M 99784 59072 S 0.0 1.3 0:00.00 compiz
3623 nickeys 20 0 1180M 99784 59072 S 0.0 1.3 0:00.01 compiz
3636 nickeys 20 0 1180M 99784 59072 S 0.0 1.3 0:15.45 compiz
3584 nickeys 20 0 1180M 99784 59072 S 0.0 1.3 2:54.29 compiz
3774 nickeys 20 0 976M 70248 61100 S 0.0 0.9 0:00.01 nautilus -n
3775 nickeys 20 0 976M 70248 61100 S 0.0 0.9 0:00.06 nautilus -n
3807 nickeys 20 0 976M 70248 61100 S 0.0 0.9 0:00.00 nautilus -n
3744 nickeys 20 0 976M 70248 61100 S 0.0 0.9 0:02.22 nautilus -n
3670 nickeys 20 0 844M 59908 21980 S 0.0 0.8 0:00.00 /usr/lib/evolution/evolution-calendar-factory
3671 nickeys 20 0 844M 59908 21980 S 0.0 0.8 0:00.00 /usr/lib/evolution/evolution-calendar-factory
3672 nickeys 20 0 844M 59908 21980 S 0.0 0.8 0:00.02 /usr/lib/evolution/evolution-calendar-factory
3673 nickeys 20 0 844M 59908 21980 S 0.0 0.8 0:00.01 /usr/lib/evolution/evolution-calendar-factory
3654 nickeys 20 0 844M 59908 21980 S 0.0 0.8 0:00.53 /usr/lib/evolution/evolution-calendar-factory
3677 nickeys 20 0 862M 50244 13576 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx3654x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
3678 nickeys 20 0 862M 50244 13576 S 0.0 0.7 0:00.01 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx3654x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
3679 nickeys 20 0 862M 50244 13576 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx3654x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
3680 nickeys 20 0 862M 50244 13576 S 0.0 0.7 0:00.12 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx3654x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
3683 nickeys 20 0 862M 50244 13576 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx3654x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
3685 nickeys 20 0 862M 50244 13576 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx3654x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
3676 nickeys 20 0 862M 50244 13576 S 0.0 0.7 0:00.57 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory contacts --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx3654x2 --own-path /org/gnome/evolution/dataserver/Subprocess/Backe
3703 nickeys 20 0 846M 50016 13452 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx3654x3 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/
3704 nickeys 20 0 846M 50016 13452 S 0.0 0.7 0:00.02 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx3654x3 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/
3705 nickeys 20 0 846M 50016 13452 S 0.0 0.7 0:00.00 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx3654x3 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/
3706 nickeys 20 0 846M 50016 13452 S 0.0 0.7 0:00.12 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx3654x3 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/
3690 nickeys 20 0 846M 50016 13452 S 0.0 0.7 0:00.59 /usr/lib/evolution/evolution-calendar-factory-subprocess --factory local --bus-name org.gnome.evolution.dataserver.Subprocess.Backend.Calendarx3654x3 --own-path /org/gnome/evolution/dataserver/Subprocess/Backend/
3868 nickeys 20 0 671M 47960 34188 S 0.0 0.6 0:00.00 /usr/lib/gnome-terminal/gnome-terminal-server
3869 nickeys 20 0 671M 47960 34188 S 0.0 0.6 0:00.00 /usr/lib/gnome-terminal/gnome-terminal-server
3870 nickeys 20 0 671M 47960 34188 S 0.0 0.6 0:01.64 /usr/lib/gnome-terminal/gnome-terminal-server
3867 nickeys 20 0 671M 47960 34188 S 5.3 0.6 1:21.73 /usr/lib/gnome-terminal/gnome-terminal-server
3546 nickeys 20 0 631M 35980 31140 S 0.0 0.5 0:00.00 /usr/lib/x86_64-linux-gnu/hud/hud-service
3547 nickeys 20 0 631M 35980 31140 S 0.0 0.5 0:00.00 /usr/lib/x86_64-linux-gnu/hud/hud-service
3548 nickeys 20 0 631M 35980 31140 S 0.0 0.5 0:00.08 /usr/lib/x86_64-linux-gnu/hud/hud-service
3519 nickeys 20 0 631M 35980 31140 S 0.0 0.5 0:00.57 /usr/lib/x86_64-linux-gnu/hud/hud-service
3802 nickeys 20 0 649M 35168 29568 S 0.0 0.5 0:00.00 nm-applet
3803 nickeys 20 0 649M 35168 29568 S 0.0 0.5 0:00.00 nm-applet
3804 nickeys 20 0 649M 35168 29568 S 0.0 0.5 0:13.14 nm-applet
3746 nickeys 20 0 649M 35168 29568 S 0.0 0.5 0:29.26 nm-applet
3543 nickeys 20 0 696M 32592 25788 S 0.0 0.4 0:00.00 /usr/lib/x86_64-linux-gnu/unity/unity-panel-service
3544 nickeys 20 0 696M 32592 25788 S 0.0 0.4 0:00.00 /usr/lib/x86_64-linux-gnu/unity/unity-panel-service
3545 nickeys 20 0 696M 32592 25788 S 0.0 0.4 0:23.42 /usr/lib/x86_64-linux-gnu/unity/unity-panel-service
3534 nickeys 20 0 696M 32592 25788 S 0.0 0.4 0:43.09 /usr/lib/x86_64-linux-gnu/unity/unity-panel-service
3796 root 20 0 614M 32336 8932 S 0.0 0.4 0:00.00 /usr/lib/x86_64-linux-gnu/fwupd/fwupd
3843 root 20 0 614M 32336 8932 S 0.0 0.4 0:00.00 /usr/lib/x86_64-linux-gnu/fwupd/fwupd
3844 root 20 0 614M 32336 8932 S 0.0 0.4 0:00.00 /usr/lib/x86_64-linux-gnu/fwupd/fwupd
3845 root 20 0 614M 32336 8932 S 0.0 0.4 0:00.00 /usr/lib/x86_64-linux-gnu/fwupd/fwupd
3846 root 20 0 614M 32336 8932 S 0.0 0.4 0:00.00 /usr/lib/x86_64-linux-gnu/fwupd/fwupd
3847 root 20 0 614M 32336 8932 S 0.0 0.4 0:00.02 /usr/lib/x86_64-linux-gnu/fwupd/fwupd
3795 root 20 0 614M 32336 8932 S 0.0 0.4 0:02.05 /usr/lib/x86_64-linux-gnu/fwupd/fwupd
4424 nickeys 20 0 479M 31504 26600 S 0.0 0.4 0:00.00 /usr/lib/x86_64-linux-gnu/notify-osd
4425 nickeys 20 0 479M 31504 26600 S 0.0 0.4 0:00.00 /usr/lib/x86_64-linux-gnu/notify-osd
4426 nickeys 20 0 479M 31504 26600 S 0.0 0.4 0:00.00 /usr/lib/x86_64-linux-gnu/notify-osd
4423 nickeys 20 0 479M 31504 26600 S 0.0 0.4 0:03.54 /usr/lib/x86_64-linux-gnu/notify-osd
3535 nickeys 20 0 835M 31380 25416 S 0.0 0.4 0:00.01 /usr/lib/unity-settings-daemon/unity-settings-daemon
3536 nickeys 20 0 835M 31380 25416 S 0.0 0.4 0:00.01 /usr/lib/unity-settings-daemon/unity-settings-daemon
3537 nickeys 20 0 835M 31380 25416 S 0.0 0.4 0:00.08 /usr/lib/unity-settings-daemon/unity-settings-daemon
3521 nickeys 20 0 835M 31380 25416 S 0.0 0.4 0:00.85 /usr/lib/unity-settings-daemon/unity-settings-daemon
13144 root 20 0 136M 30488 3068 S 0.0 0.4 0:00.65 xl create /etc/xen/pv-guest1.cfg
13143 root 20 0 136M 30488 3068 S 0.0 0.4 0:15.69 xl create /etc/xen/pv-guest1.cfg
2383 root 20 0 136M 30480 3056 S 0.0 0.4 0:01.06 xl create /etc/xen/pv-guest3.cfg
2382 root 20 0 136M 30480 3056 S 0.0 0.4 0:23.89 xl create /etc/xen/pv-guest3.cfg
2617 root 20 0 136M 30464 3040 S 0.0 0.4 0:00.81 xl create /etc/xen/pv-guest4.cfg
2616 root 20 0 136M 30464 3040 S 0.0 0.4 0:20.26 xl create /etc/xen/pv-guest4.cfg
10210 root 20 0 136M 30464 3040 S 0.0 0.4 0:00.69 xl create /etc/xen/pv-guest2.cfg
10209 root 20 0 136M 30464 3040 S 0.0 0.4 0:17.93 xl create /etc/xen/pv-guest2.cfg
3466 nickeys 20 0 468M 29976 25032 S 0.0 0.4 0:00.00 /usr/lib/ibus/ibus-ui-gtk3
3468 nickeys 20 0 468M 29976 25032 S 0.0 0.4 0:00.00 /usr/lib/ibus/ibus-ui-gtk3
3469 nickeys 20 0 468M 29976 25032 S 0.0 0.4 0:01.10 /usr/lib/ibus/ibus-ui-gtk3
Those statistics were, of course, sorted in memory usage and the 2 machines were in idle.
I looked at the two PCs and found nothing strange aside from only the problem (shortage of memory in B).
Are there any other tools I can use when this happens?
Thanks!