1 # -----------------------------
2 # PostgreSQL configuration file
3 # -----------------------------
5 # This file consists of lines of the form:
9 # (The '=' is optional.) White space may be used. Comments are introduced
10 # with '#' anywhere on a line. The complete list of option names and
11 # allowed values can be found in the PostgreSQL documentation. The
12 # commented-out settings shown in this file represent the default values.
14 # Please note that re-commenting a setting is NOT sufficient to revert it
15 # to the default value, unless you restart the postmaster.
17 # Any option can also be given as a command line switch to the
18 # postmaster, e.g. 'postmaster -c log_connections=on'. Some options
19 # can be changed at run-time with the 'SET' SQL command.
21 # This file is read on postmaster startup and when the postmaster
22 # receives a SIGHUP. If you edit the file on a running system, you have
23 # to SIGHUP the postmaster for the changes to take effect, or use
24 # "pg_ctl reload". Some settings, such as listen_address, require
25 # a postmaster shutdown and restart to take effect.
28 #---------------------------------------------------------------------------
30 #---------------------------------------------------------------------------
32 # The default values of these variables are driven from the -D command line
33 # switch or PGDATA environment variable, represented here as ConfigDir.
35 #data_directory = 'ConfigDir' # use data in another directory
36 #hba_file = 'ConfigDir/pg_hba.conf' # host-based authentication file
37 #ident_file = 'ConfigDir/pg_ident.conf # IDENT configuration file
39 # If external_pid_file is not explicitly set, no extra pid file is written.
40 #external_pid_file = '(none)' # write an extra pid file
43 #---------------------------------------------------------------------------
44 # CONNECTIONS AND AUTHENTICATION
45 #---------------------------------------------------------------------------
47 # - Connection Settings -
49 #listen_addresses = 'localhost' # what IP interface(s) to listen on;
50 # defaults to localhost, '*' = any
52 #max_connections = 100 # note: increasing max_connections costs
53 # about 500 bytes of shared memory per
54 # connection slot, in addition to costs
55 # from shared_buffers and
56 # max_locks_per_transaction.
57 #superuser_reserved_connections = 2
58 #unix_socket_directory = ''
59 #unix_socket_group = ''
60 #unix_socket_permissions = 0777 # octal
61 #bonjour_name = '' # defaults to the computer name
63 # - Security & Authentication -
65 #authentication_timeout = 60 # 1-600, in seconds
67 #password_encryption = on
68 #db_user_namespace = off
71 #krb_server_keyfile = ''
72 #krb_srvname = 'postgres'
73 #krb_server_hostname = '(any)' # if not set, matches any keytab entry
74 #krb_caseins_users = off
77 # see 'man 7 tcp' for details
78 #tcp_keepalives_idle = 0 # TCP_KEEPIDLE, in secs; 0 uses the
80 #tcp_keepalives_interval = 0 # TCP_KEEPINTVL, in seconds; 0 uses the
82 #tcp_keepalives_count = 0 # TCP_KEEPCNT, in seconds; 0 uses the
85 #---------------------------------------------------------------------------
86 # RESOURCE USAGE (except WAL)
87 #---------------------------------------------------------------------------
91 #shared_buffers = 1000 # min 16 or max_connections*2, 8KB each
92 #temp_buffers = 1000 # min 100, 8KB each
93 #max_prepared_transactions = 50 # can be 0 or more
94 #work_mem = 1024 # min 64, size in KB
95 #maintenance_work_mem = 16384 # min 1024, size in KB
96 #max_stack_depth = 2048 # min 100, size in KB
100 #max_fsm_pages = 20000 # min max_fsm_relations*16, 6 bytes each
101 #max_fsm_relations = 1000 # min 100, ~50 bytes each
103 # - Kernel Resource Usage -
105 #max_files_per_process = 1000 # min 25
106 #preload_libraries = ''
108 # - Cost-Based Vacuum Delay -
110 #vacuum_cost_delay = 0 # 0-1000 milliseconds
111 #vacuum_cost_page_hit = 1 # 0-10000 credits
112 #vacuum_cost_page_miss = 10 # 0-10000 credits
113 #vacuum_cost_page_dirty = 20 # 0-10000 credits
114 #vacuum_cost_limit = 200 # 0-10000 credits
116 # - Background writer -
118 #bgwriter_delay = 200 # 10-10000 milliseconds between rounds
119 #bgwriter_lru_percent = 1.0 # 0-100% of LRU buffers scanned/round
120 #bgwriter_lru_maxpages = 5 # 0-1000 buffers max written/round
121 #bgwriter_all_percent = 0.333 # 0-100% of all buffers scanned/round
122 #bgwriter_all_maxpages = 5 # 0-1000 buffers max written/round
125 #---------------------------------------------------------------------------
127 #---------------------------------------------------------------------------
131 #fsync = on # turns forced synchronization on or off
132 #wal_sync_method = fsync # the default is the first option
133 # supported by the operating system:
139 #full_page_writes = on # recover from partial page writes
140 #wal_buffers = 8 # min 4, 8KB each
141 #commit_delay = 0 # range 0-100000, in microseconds
142 #commit_siblings = 5 # range 1-1000
146 #checkpoint_segments = 3 # in logfile segments, min 1, 16MB each
147 #checkpoint_timeout = 300 # range 30-3600, in seconds
148 #checkpoint_warning = 30 # in seconds, 0 is off
152 #archive_command = '' # command to use to archive a logfile
156 #---------------------------------------------------------------------------
158 #---------------------------------------------------------------------------
160 # - Planner Method Configuration -
162 #enable_bitmapscan = on
164 #enable_hashjoin = on
165 #enable_indexscan = on
166 #enable_mergejoin = on
167 #enable_nestloop = on
172 # - Planner Cost Constants -
174 #effective_cache_size = 1000 # typically 8KB each
175 #random_page_cost = 4 # units are one sequential page fetch
177 #cpu_tuple_cost = 0.01 # (same)
178 #cpu_index_tuple_cost = 0.001 # (same)
179 #cpu_operator_cost = 0.0025 # (same)
181 # - Genetic Query Optimizer -
185 #geqo_effort = 5 # range 1-10
186 #geqo_pool_size = 0 # selects default based on effort
187 #geqo_generations = 0 # selects default based on effort
188 #geqo_selection_bias = 2.0 # range 1.5-2.0
190 # - Other Planner Options -
192 #default_statistics_target = 10 # range 1-1000
193 #enable_constraint_exclusion = off
194 #from_collapse_limit = 8
195 #join_collapse_limit = 8 # 1 disables collapsing of explicit
199 #---------------------------------------------------------------------------
200 # ERROR REPORTING AND LOGGING
201 #---------------------------------------------------------------------------
205 #log_destination = 'stderr' # Valid values are combinations of
206 # stderr, syslog and eventlog,
207 # depending on platform.
209 # This is used when logging to stderr:
210 #redirect_stderr = off # Enable capturing of stderr into log
213 # These are only used if redirect_stderr is on:
214 #log_directory = 'pg_log' # Directory where log files are written
215 # Can be absolute or relative to PGDATA
216 #log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' # Log file name pattern.
217 # Can include strftime() escapes
218 #log_truncate_on_rotation = off # If on, any existing log file of the same
219 # name as the new log file will be
220 # truncated rather than appended to. But
221 # such truncation only occurs on
222 # time-driven rotation, not on restarts
223 # or size-driven rotation. Default is
224 # off, meaning append to existing files
226 #log_rotation_age = 1440 # Automatic rotation of logfiles will
227 # happen after so many minutes. 0 to
229 #log_rotation_size = 10240 # Automatic rotation of logfiles will
230 # happen after so many kilobytes of log
231 # output. 0 to disable.
233 # These are relevant when logging to syslog:
234 #syslog_facility = 'LOCAL0'
235 #syslog_ident = 'postgres'
240 #client_min_messages = notice # Values, in order of decreasing detail:
251 #log_min_messages = notice # Values, in order of decreasing detail:
265 #log_error_verbosity = default # terse, default, or verbose messages
267 #log_min_error_statement = panic # Values in order of increasing severity:
279 #log_min_duration_statement = -1 # -1 is disabled, 0 logs all statements
280 # and their durations, in milliseconds.
282 #silent_mode = off # DO NOT USE without syslog or
287 #debug_print_parse = off
288 #debug_print_rewritten = off
289 #debug_print_plan = off
290 #debug_pretty_print = off
291 #log_connections = off
292 #log_disconnections = off
294 #log_line_prefix = '' # Special values:
297 # %r = remote host and port
300 # %t = timestamp (no milliseconds)
301 # %m = timestamp with milliseconds
304 # %l = session line number
305 # %s = session start timestamp
306 # %x = transaction id
307 # %q = stop here in non-session
311 #log_statement = 'none' # none, mod, ddl, all
315 #---------------------------------------------------------------------------
317 #---------------------------------------------------------------------------
319 # - Statistics Monitoring -
321 #log_parser_stats = off
322 #log_planner_stats = off
323 #log_executor_stats = off
324 #log_statement_stats = off
326 # - Query/Index Statistics Collector -
328 #stats_start_collector = on
329 #stats_command_string = off
330 #stats_block_level = off
331 #stats_row_level = off
332 #stats_reset_on_server_start = off
335 #---------------------------------------------------------------------------
336 # AUTOVACUUM PARAMETERS
337 #---------------------------------------------------------------------------
339 #autovacuum = false # enable autovacuum subprocess?
340 #autovacuum_naptime = 60 # time between autovacuum runs, in secs
341 #autovacuum_vacuum_threshold = 1000 # min # of tuple updates before
343 #autovacuum_analyze_threshold = 500 # min # of tuple updates before
345 #autovacuum_vacuum_scale_factor = 0.4 # fraction of rel size before
347 #autovacuum_analyze_scale_factor = 0.2 # fraction of rel size before
349 #autovacuum_vacuum_cost_delay = -1 # default vacuum cost delay for
350 # autovac, -1 means use
352 #autovacuum_vacuum_cost_limit = -1 # default vacuum cost limit for
353 # autovac, -1 means use
357 #---------------------------------------------------------------------------
358 # CLIENT CONNECTION DEFAULTS
359 #---------------------------------------------------------------------------
361 # - Statement Behavior -
363 #search_path = '$user,public' # schema names
364 #default_tablespace = '' # a tablespace name, '' uses
366 #check_function_bodies = on
367 #default_transaction_isolation = 'read committed'
368 #default_transaction_read_only = off
369 #statement_timeout = 0 # 0 is disabled, in milliseconds
371 # - Locale and Formatting -
373 #datestyle = 'iso, mdy'
374 #timezone = unknown # actually, defaults to TZ
375 # environment setting
376 #australian_timezones = off
377 #extra_float_digits = 0 # min -15, max 2
378 #client_encoding = sql_ascii # actually, defaults to database
381 # These settings are initialized by initdb -- they might be changed
382 #lc_messages = 'C' # locale for system error message
384 #lc_monetary = 'C' # locale for monetary formatting
385 #lc_numeric = 'C' # locale for number formatting
386 #lc_time = 'C' # locale for time formatting
390 #explain_pretty_print = on
391 #dynamic_library_path = '$libdir'
394 #---------------------------------------------------------------------------
396 #---------------------------------------------------------------------------
398 #deadlock_timeout = 1000 # in milliseconds
399 #max_locks_per_transaction = 64 # min 10, ~200*max_connections
403 #---------------------------------------------------------------------------
404 # VERSION/PLATFORM COMPATIBILITY
405 #---------------------------------------------------------------------------
407 # - Previous Postgres Versions -
409 #add_missing_from = off
410 #regex_flavor = advanced # advanced, extended, or basic
411 #sql_inheritance = on
412 #default_with_oids = off
413 #escape_string_warning = off
415 # - Other Platforms & Clients -
417 #transform_null_equals = off
420 #---------------------------------------------------------------------------
422 #---------------------------------------------------------------------------
424 #custom_variable_classes = '' # list of custom variable class names