:settings => {
:defaults => {
:work_mem => "300MB",
:maintenance_work_mem => "10GB",
:random_page_cost => "1.5",
:effective_cache_size => "60GB",
:settings => {
:defaults => {
:work_mem => "300MB",
:maintenance_work_mem => "10GB",
:random_page_cost => "1.5",
:effective_cache_size => "60GB",