feat: added compact memory for virtual machines

Signed-off-by: Louis Vallat <contact@louis-vallat.dev>

compact_mem.yaml

@@ -0,0 +1,5 @@
+---
+- name: "Compact mem on VMs."
+  hosts: all
+  roles:
+      - compact_mem

roles/compact_mem/tasks/main.yaml

@@ -0,0 +1,7 @@
+---
+- name: Set cron to compact memory
+  ansible.builtin.cron:
+    name: "compact memory every day"
+    special_time: "daily"
+    job: "echo 1 > /proc/sys/vm/compact_memory"
+  when: compact_mem