Merge pull request #332 from OpenHistoricalMap/pg-db/prod

Update values for api-db production

images/db/config/postgresql.production.conf

@@ -124,7 +124,7 @@ max_connections = 250			# (change requires restart)
 
 # - Memory -
 
-shared_buffers = 128MB			# min 128kB
+shared_buffers = 2GB			# min 128kB
 					# (change requires restart)
 #huge_pages = try			# on, off, or try
 					# (change requires restart)
@@ -135,9 +135,9 @@ temp_buffers = 512MB			# min 800kB
 					# (change requires restart)
 # Caution: it is not advisable to set max_prepared_transactions nonzero unless
 # you actively intend to use prepared transactions.
-work_mem = 32MB				# min 64kB
+work_mem = 20MB				# min 64kB
 #hash_mem_multiplier = 1.0		# 1-1000.0 multiplier on hash table work_mem
-#maintenance_work_mem = 64MB		# min 1MB
+maintenance_work_mem = 512MB		# min 1MB
 #autovacuum_work_mem = -1		# min 1MB, or -1 to use maintenance_work_mem
 #logical_decoding_work_mem = 64MB	# min 64kB
 #max_stack_depth = 2MB			# min 100kB
@@ -184,7 +184,7 @@ dynamic_shared_memory_type = posix	# the default is the first option
 # - Asynchronous Behavior -
 
 #backend_flush_after = 0		# measured in pages, 0 disables
-#effective_io_concurrency = 1		# 1-1000; 0 disables prefetching
+effective_io_concurrency = 200		# 1-1000; 0 disables prefetching
 #maintenance_io_concurrency = 10	# 1-1000; 0 disables prefetching
 #max_worker_processes = 8		# (change requires restart)
 #max_parallel_workers_per_gather = 2	# taken from max_parallel_workers
@@ -390,7 +390,7 @@ random_page_cost = 1.1			# same scale as above
 #parallel_tuple_cost = 0.1		# same scale as above
 #min_parallel_table_scan_size = 8MB
 #min_parallel_index_scan_size = 512kB
-effective_cache_size = 16GB
+effective_cache_size = 6GB
 
 #jit_above_cost = 100000		# perform JIT compilation if available
 					# and query more expensive than this;