added experiment without index, minor adjustments

compose.yml

@@ -36,8 +36,8 @@ services:
   postgres:
     build: postgres
     command: -c config_file=/postgres_conf
-    shm_size: 5gb
     hostname: $PGHOST
+    shm_size: 10gb
     environment:
       - PGUSER
       - POSTGRES_USER=$PGUSER

insert_tests.py

@@ -169,6 +169,14 @@ if __name__ == "__main__":
             ),
             "env": env_default,
         },
+        {
+            "name": "experiment_no_index",
+            "compose_files": (
+                "compose.yml",
+                "compose.edge-id.yml",
+            ),
+            "env": env_default,
+        },
     )
     for experiment in experiments:
         run_experiment(**experiment)

postgres/queries.sql

@@ -95,15 +95,11 @@ PREPARE two_hop (INTEGER) AS
   ), hop1 AS (
     SELECT destination AS vertex
     FROM double_edge
-    WHERE source = $1
+    WHERE source = $1 AND destination <> $1
   )
-  SELECT vertex
-  FROM (
   SELECT vertex
   FROM hop1
   UNION
   SELECT destination
   FROM double_edge
-    JOIN hop1 ON vertex=source
-  )
-  WHERE vertex <> $1;
+  JOIN hop1 ON vertex = source AND destination <> $1;

postgresql.conf

@@ -62,7 +62,7 @@ listen_addresses = '*'
 					# defaults to 'localhost'; use '*' for all
 					# (change requires restart)
 #port = 5432				# (change requires restart)
-max_connections = 100			# (change requires restart)
+max_connections = 6			# (change requires restart)
 #reserved_connections = 0		# (change requires restart)
 #superuser_reserved_connections = 3	# (change requires restart)
 #unix_socket_directories = '/var/run/postgresql' # comma-separated list of directories
@@ -127,7 +127,7 @@ max_connections = 100			# (change requires restart)
 
 # - Memory -
 
-shared_buffers = 10GB			# min 128kB
+shared_buffers = 8GB			# min 128kB
 					# (change requires restart)
 #huge_pages = try			# on, off, or try
 					# (change requires restart)
@@ -140,7 +140,7 @@ shared_buffers = 10GB			# min 128kB
 # you actively intend to use prepared transactions.
 work_mem = 256MB				# min 64kB
 #hash_mem_multiplier = 2.0		# 1-1000.0 multiplier on hash table work_mem
-maintenance_work_mem = 1GB		# min 1MB
+maintenance_work_mem = 2GB		# 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
@@ -192,7 +192,7 @@ dynamic_shared_memory_type = posix	# the default is usually the first option
 #backend_flush_after = 0		# measured in pages, 0 disables
 #effective_io_concurrency = 1		# 1-1000; 0 disables prefetching
 #maintenance_io_concurrency = 10	# 1-1000; 0 disables prefetching
-#max_worker_processes = 8		# (change requires restart)
+max_worker_processes = 6		# (change requires restart)
 #max_parallel_workers_per_gather = 2	# limited by max_parallel_workers
 #max_parallel_maintenance_workers = 2	# limited by max_parallel_workers
 #max_parallel_workers = 8		# number of max_worker_processes that
@@ -406,7 +406,7 @@ 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 = 10GB
+effective_cache_size = 12GB
 
 #jit_above_cost = 100000		# perform JIT compilation if available
 					# and query more expensive than this;
@@ -429,7 +429,7 @@ effective_cache_size = 10GB
 
 # - Other Planner Options -
 
-default_statistics_target = 300	# range 1-10000
+default_statistics_target = 1000	# range 1-10000
 #constraint_exclusion = partition	# on, off, or partition
 #cursor_tuple_fraction = 0.1		# range 0.0-1.0
 #from_collapse_limit = 8
@@ -597,7 +597,7 @@ default_statistics_target = 300	# range 1-10000
 					# -1 means print in full, 0 disables
 #log_statement = 'none'			# none, ddl, mod, all
 #log_replication_commands = off
-#log_temp_files = -1			# log temporary files equal or larger
+log_temp_files = 0			# log temporary files equal or larger
 					# than the specified size in kilobytes;
 					# -1 disables, 0 logs all temp files
 log_timezone = 'Etc/UTC'