diff --git a/tests/roles/bootstrap-host/templates/user_variables.aio.yml.j2 b/tests/roles/bootstrap-host/templates/user_variables.aio.yml.j2
index 1a862c926d..a9dcb2a0f3 100644
--- a/tests/roles/bootstrap-host/templates/user_variables.aio.yml.j2
+++ b/tests/roles/bootstrap-host/templates/user_variables.aio.yml.j2
@@ -43,11 +43,20 @@ tempest_public_net_physical_name: vlan
 galera_monitoring_allowed_source: "0.0.0.0/0"
 # TODO(noonedeadpunk): This should be enabled, once we will re-work SSL part
 #galera_use_ssl: "{{ ('infra' in bootstrap_host_scenarios_expanded) }}"
-galera_innodb_buffer_pool_size: 16M
 galera_innodb_log_buffer_size: 4M
 galera_wsrep_provider_options:
  - { option: "gcache.size", value: "4M" }
 
+galera_my_cnf_overrides:
+  mysqld:
+    read_buffer_size: '64K'
+    innodb_buffer_pool_size: '16M'
+    thread_stack: '192K'
+    thread_cache_size: '8'
+    tmp_table_size: '8M'
+    sort_buffer_size: '8M'
+    max_allowed_packet: '8M'
+
 ### Set workers for all services to optimise memory usage
 
 ## Repo