Our CI environment runs all services (including qemu, libvirt, etc.)
on a single node with only 8 GB RAM. The default MariaDB configuration
is too memory-heavy for such constrained resources.
This change introduces a mariadb-overrides.j2 file that limits key
memory-consuming options:
- max_connections = 300 (instead of 10000)
- innodb_buffer_pool_size = 1024M
- tmp_table_size / max_heap_table_size = 32M
These limits help avoid OOM kills during testing and prevent
unnecessary RAM consumption.
This change is CI-specific and does not impact kolla-ansible user
deployments.
Change-Id: I9a59b2f7c5dafdfeb147eb93d89039e98988049f
9014429675