Use galera options suitable for VCP

Change-Id: I73fa258eaded54ed7e20cddd67318919d33f3e18
Closes-Bug:#16528
diff --git "a/\173\173 cookiecutter._env_name \175\175/overrides.yml" "b/\173\173 cookiecutter._env_name \175\175/overrides.yml"
index 0195699..e1cea68 100644
--- "a/\173\173 cookiecutter._env_name \175\175/overrides.yml"
+++ "b/\173\173 cookiecutter._env_name \175\175/overrides.yml"
@@ -12,6 +12,12 @@
   _param:
     salt_api_password_hash: $6$V7O4vDAF$1FYwutKk53WFY314nq5IshabL5YXMuYklGglD7/Toj9bzCcgHTgudxhdeexmE3jf21lZPLmXy9K5mwzGyFbQt1
     apt_mk_version: stable  # This will be replaced with REPOSITORY_SUITE env variable
+    # Use galera options suitable for virtualized control plane
+    galera_innodb_read_io_threads: 2
+    galera_innodb_write_io_threads: 2
+    galera_wsrep_slave_threads: 2
+    galera_xtrabackup_parallel: 1
+    galera_error_log_enabled: true
   openssh:
     server:
       password_auth: true