node-db: fix shared memory calculation

We were casting `0.3` to `int` which results in `0`.

Resolves:
https://github.com/status-im/infra-waku/issues/28

Signed-off-by: Jakub Sokołowski <jakub@status.im>

ansible/group_vars/store-db.yml

@@ -55,8 +55,8 @@ postgres_system_setting_stage:
     ## Autovacuum
     autovacuum: 'off'
 
-# For each 16GB of ram, 1 GB is set to share memory
-postgres_share_memory: '{{ ansible_memtotal_mb / 16 | int }}m'
+# Use the 10% of RAM for shared memory
+postgres_ha_share_memory: '{{ (ansible_memtotal_mb * 0.1) | int }}m'
 
 # Consul
 postgres_ha_consul_check_interval: '60s'

ansible/requirements.yml

@@ -26,7 +26,7 @@
 
 - name: infra-role-postgres-ha
   src: git@github.com:status-im/infra-role-postgres-ha.git
-  version: fbc3376e790c526bb401edb1a6a1ffdc4a4d1ae1
+  version: 0e166b76b4875f2413f093c264470bee3361b3f4
 
 - name: infra-role-nim-waku-sonda
   src: git@github.com:status-im/infra-role-nim-waku-sonda.git