LVE Shows Huge Memory Usage for Users When no Actual Processes are Running

Issue

If you see no processes under some user, but LVE Manager and LVE Statistics keep showing it is using some memory, the most probable reason for this behaviour is disk cache.

Environment

• CloudLinux
• LVE

Solution

To check personal users' disk cache, use these files:

• on CloudLinux 6:

  # cat /proc/bc/XXX/meminfo

• on CloudLinux 7 and CloudLinux 6 Hybrid:

  # cat /proc/bc/lveXXX/meminfo

  Look for this line: Cached: 67300 kB

• on CloudLinux 8 and CloudLinux 7 Hybrid:

  # cat /sys/fs/cgroup/memory/lveXXX/memory.stat

  Look for this line: cache 1662976

NB: XXX is user ID, could be found with:

# id username

Note the Path

CloudLinux uses hierarchical cgroups where:

• lvpXXXX represents a parent cgroup that contains multiple LVE users, e.g. when a user belongs to a reseller.

• lveXXXX is the specific cgroup for an individual user.

  # find /sys/fs/cgroup/memory/ -name lveXXXX

• example without parent:

  # find /sys/fs/cgroup/memory/ -name lve1006
  /sys/fs/cgroup/memory/lve1006

• example with parent:

  # find /sys/fs/cgroup/memory/ -name lve1044
  /sys/fs/cgroup/memory/lvp1044/lve1044