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' # the host-based authentication file
37 # ident_file = 'ConfigDir/pg_ident.conf' # the 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
53 # note: increasing max_connections costs about 500 bytes of shared
54 # memory per connection slot, in addition to costs from shared_buffers
55 # and max_locks_per_transaction.
56 #superuser_reserved_connections = 2
57 #unix_socket_directory = ''
58 #unix_socket_group = ''
59 #unix_socket_permissions = 0777 # octal
60 #bonjour_name = '' # defaults to the computer name
62 # - Security & Authentication -
64 #authentication_timeout = 60 # 1-600, in seconds
66 #password_encryption = true
67 #db_user_namespace = false
69 #krb_server_keyfile = ''
70 #krb_caseins_users = false
71 #krb_srvname = 'postgres'
74 #---------------------------------------------------------------------------
75 # RESOURCE USAGE (except WAL)
76 #---------------------------------------------------------------------------
80 #shared_buffers = 1000 # min 16, at least max_connections*2, 8KB each
81 #temp_buffers = 1000 # min 100, 8KB each
82 #work_mem = 1024 # min 64, size in KB
83 #maintenance_work_mem = 16384 # min 1024, size in KB
84 #max_stack_depth = 2048 # min 100, size in KB
88 #max_fsm_pages = 20000 # min max_fsm_relations*16, 6 bytes each
89 #max_fsm_relations = 1000 # min 100, ~50 bytes each
91 # - Kernel Resource Usage -
93 #max_files_per_process = 1000 # min 25
94 #preload_libraries = ''
96 # - Cost-Based Vacuum Delay -
98 #vacuum_cost_delay = 0 # 0-1000 milliseconds
99 #vacuum_cost_page_hit = 1 # 0-10000 credits
100 #vacuum_cost_page_miss = 10 # 0-10000 credits
101 #vacuum_cost_page_dirty = 20 # 0-10000 credits
102 #vacuum_cost_limit = 200 # 0-10000 credits
104 # - Background writer -
106 #bgwriter_delay = 200 # 10-10000 milliseconds between rounds
107 #bgwriter_lru_percent = 1.0 # 0-100% of LRU buffers scanned in each round
108 #bgwriter_lru_maxpages = 5 # 0-1000 buffers max written per round
109 #bgwriter_all_percent = 0.333 # 0-100% of all buffers scanned in each round
110 #bgwriter_all_maxpages = 5 # 0-1000 buffers max written per round
113 #---------------------------------------------------------------------------
115 #---------------------------------------------------------------------------
119 #fsync = true # turns forced synchronization on or off
120 #wal_sync_method = fsync # the default varies across platforms:
121 # fsync, fdatasync, fsync_writethrough,
122 # open_sync, open_datasync
123 #wal_buffers = 8 # min 4, 8KB each
124 #commit_delay = 0 # range 0-100000, in microseconds
125 #commit_siblings = 5 # range 1-1000
129 #checkpoint_segments = 3 # in logfile segments, min 1, 16MB each
130 #checkpoint_timeout = 300 # range 30-3600, in seconds
131 #checkpoint_warning = 30 # 0 is off, in seconds
135 #archive_command = '' # command to use to archive a logfile segment
138 #---------------------------------------------------------------------------
140 #---------------------------------------------------------------------------
142 # - Planner Method Configuration -
144 #enable_bitmapscan = true
145 #enable_hashagg = true
146 #enable_hashjoin = true
147 #enable_indexscan = true
148 #enable_mergejoin = true
149 #enable_nestloop = true
150 #enable_seqscan = true
152 #enable_tidscan = true
154 # - Planner Cost Constants -
156 #effective_cache_size = 1000 # typically 8KB each
157 #random_page_cost = 4 # units are one sequential page fetch cost
158 #cpu_tuple_cost = 0.01 # (same)
159 #cpu_index_tuple_cost = 0.001 # (same)
160 #cpu_operator_cost = 0.0025 # (same)
162 # - Genetic Query Optimizer -
166 #geqo_effort = 5 # range 1-10
167 #geqo_pool_size = 0 # selects default based on effort
168 #geqo_generations = 0 # selects default based on effort
169 #geqo_selection_bias = 2.0 # range 1.5-2.0
171 # - Other Planner Options -
173 #default_statistics_target = 10 # range 1-1000
174 #from_collapse_limit = 8
175 #join_collapse_limit = 8 # 1 disables collapsing of explicit JOINs
178 #---------------------------------------------------------------------------
179 # ERROR REPORTING AND LOGGING
180 #---------------------------------------------------------------------------
184 #log_destination = 'stderr' # Valid values are combinations of stderr,
185 # syslog and eventlog, depending on
188 # This is relevant when logging to stderr:
189 #redirect_stderr = false # Enable capturing of stderr into log files.
190 # These are only relevant if redirect_stderr is true:
191 #log_directory = 'pg_log' # Directory where log files are written.
192 # May be specified absolute or relative to PGDATA
193 #log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' # Log file name pattern.
194 # May include strftime() escapes
195 #log_truncate_on_rotation = false # If true, any existing log file of the
196 # same name as the new log file will be truncated
197 # rather than appended to. But such truncation
198 # only occurs on time-driven rotation,
199 # not on restarts or size-driven rotation.
200 # Default is false, meaning append to existing
201 # files in all cases.
202 #log_rotation_age = 1440 # Automatic rotation of logfiles will happen after
203 # so many minutes. 0 to disable.
204 #log_rotation_size = 10240 # Automatic rotation of logfiles will happen after
205 # so many kilobytes of log output. 0 to disable.
207 # These are relevant when logging to syslog:
208 #syslog_facility = 'LOCAL0'
209 #syslog_ident = 'postgres'
214 #client_min_messages = notice # Values, in order of decreasing detail:
215 # debug5, debug4, debug3, debug2, debug1,
216 # log, notice, warning, error
218 #log_min_messages = notice # Values, in order of decreasing detail:
219 # debug5, debug4, debug3, debug2, debug1,
220 # info, notice, warning, error, log, fatal,
223 #log_error_verbosity = default # terse, default, or verbose messages
225 #log_min_error_statement = panic # Values in order of increasing severity:
226 # debug5, debug4, debug3, debug2, debug1,
227 # info, notice, warning, error, panic(off)
229 #log_min_duration_statement = -1 # -1 is disabled, in milliseconds.
231 #silent_mode = false # DO NOT USE without syslog or redirect_stderr
235 #debug_print_parse = false
236 #debug_print_rewritten = false
237 #debug_print_plan = false
238 #debug_pretty_print = false
239 #log_connections = false
240 #log_disconnections = false
241 #log_duration = false
242 #log_line_prefix = '' # %u = user name
244 # %r = remote host and port
247 # %t = timestamp (no milliseconds)
248 # %m = timestamp with milliseconds
251 # %l = session line number
252 # %s = session start timestamp
253 # %x = transaction id
254 # %q = stop here in non-session processes
257 #log_statement = 'none' # none, mod, ddl, all
258 #log_hostname = false
261 #---------------------------------------------------------------------------
263 #---------------------------------------------------------------------------
265 # - Statistics Monitoring -
267 #log_parser_stats = false
268 #log_planner_stats = false
269 #log_executor_stats = false
270 #log_statement_stats = false
272 # - Query/Index Statistics Collector -
274 #stats_start_collector = true
275 #stats_command_string = false
276 #stats_block_level = false
277 #stats_row_level = false
278 #stats_reset_on_server_start = true
281 #---------------------------------------------------------------------------
282 # CLIENT CONNECTION DEFAULTS
283 #---------------------------------------------------------------------------
285 # - Statement Behavior -
287 #search_path = '$user,public' # schema names
288 #default_tablespace = '' # a tablespace name, or '' for default
289 #check_function_bodies = true
290 #default_transaction_isolation = 'read committed'
291 #default_transaction_read_only = false
292 #statement_timeout = 0 # 0 is disabled, in milliseconds
294 # - Locale and Formatting -
296 #datestyle = 'iso, mdy'
297 #timezone = unknown # actually, defaults to TZ environment setting
298 #australian_timezones = false
299 #extra_float_digits = 0 # min -15, max 2
300 #client_encoding = sql_ascii # actually, defaults to database encoding
302 # These settings are initialized by initdb -- they might be changed
303 #lc_messages = 'C' # locale for system error message strings
304 #lc_monetary = 'C' # locale for monetary formatting
305 #lc_numeric = 'C' # locale for number formatting
306 #lc_time = 'C' # locale for time formatting
310 #explain_pretty_print = true
311 #dynamic_library_path = '$libdir'
314 #---------------------------------------------------------------------------
316 #---------------------------------------------------------------------------
318 #deadlock_timeout = 1000 # in milliseconds
319 #max_locks_per_transaction = 64 # min 10, ~200*max_connections bytes each
322 #---------------------------------------------------------------------------
323 # VERSION/PLATFORM COMPATIBILITY
324 #---------------------------------------------------------------------------
326 # - Previous Postgres Versions -
328 #add_missing_from = false
329 #regex_flavor = advanced # advanced, extended, or basic
330 #sql_inheritance = true
331 #default_with_oids = false
333 # - Other Platforms & Clients -
335 #transform_null_equals = false