{ config, ... }: {
  services.postgresql = {
    settings = {
      max_connections = 200;
      shared_buffers = "4GB";
      effective_cache_size = "12GB";
      maintenance_work_mem = "1GB";
      checkpoint_completion_target = 0.9;
      wal_buffers = "16MB";
      default_statistics_target = 100;
      random_page_cost = 1.1;
      effective_io_concurrency = 300;
      work_mem = "10485kB";
      min_wal_size = "1GB";
      max_wal_size = "4GB";
      max_worker_processes = 4;
      max_parallel_workers_per_gather = 2;
      max_parallel_workers = 4;
      max_parallel_maintenance_workers = 2;
    };
  };
}