1 # -----------------------------
2 # PostgreSQL configuration file
3 # -----------------------------
5 # This file consists of lines of the form:
9 # (The "=" is optional.) Whitespace may be used. Comments are introduced with
10 # "#" anywhere on a line. The complete list of parameter names and allowed
11 # values can be found in the PostgreSQL documentation.
13 # The commented-out settings shown in this file represent the default values.
14 # Re-commenting a setting is NOT sufficient to revert it to the default value;
15 # you need to reload the server.
17 # This file is read on server startup and when the server receives a SIGHUP
18 # signal. If you edit the file on a running system, you have to SIGHUP the
19 # server for the changes to take effect, or use "pg_ctl reload". Some
20 # parameters, which are marked below, require a server shutdown and restart to
23 # Any parameter can also be given as a command-line option to the server, e.g.,
24 # "postgres -c log_connections=on". Some paramters can be changed at run time
25 # with the "SET" SQL command.
27 # Memory units: kB = kilobytes MB = megabytes GB = gigabytes
28 # Time units: ms = milliseconds s = seconds min = minutes h = hours d = days
31 #------------------------------------------------------------------------------
33 #------------------------------------------------------------------------------
35 # The default values of these variables are driven from the -D command-line
36 # option or PGDATA environment variable, represented here as ConfigDir.
38 data_directory = '/var/lib/postgresql/8.3/main' # use data in another directory
39 # (change requires restart)
40 hba_file = '/etc/postgresql/8.3/main/pg_hba.conf' # host-based authentication file
41 # (change requires restart)
42 ident_file = '/etc/postgresql/8.3/main/pg_ident.conf' # ident configuration file
43 # (change requires restart)
45 # If external_pid_file is not explicitly set, no extra PID file is written.
46 external_pid_file = '/var/run/postgresql/8.3-main.pid' # write an extra PID file
47 # (change requires restart)
50 #------------------------------------------------------------------------------
51 # CONNECTIONS AND AUTHENTICATION
52 #------------------------------------------------------------------------------
54 # - Connection Settings -
56 listen_addresses = '*' # what IP address(es) to listen on;
57 # comma-separated list of addresses;
58 # defaults to 'localhost', '*' = all
59 # (change requires restart)
60 port = 5432 # (change requires restart)
61 max_connections = 100 # (change requires restart)
62 # Note: Increasing max_connections costs ~400 bytes of shared memory per
63 # connection slot, plus lock space (see max_locks_per_transaction). You might
64 # also need to raise shared_buffers to support more connections.
65 #superuser_reserved_connections = 3 # (change requires restart)
66 unix_socket_directory = '/var/run/postgresql' # (change requires restart)
67 #unix_socket_group = '' # (change requires restart)
68 #unix_socket_permissions = 0777 # begin with 0 to use octal notation
69 # (change requires restart)
70 #bonjour_name = '' # defaults to the computer name
71 # (change requires restart)
73 # - Security and Authentication -
75 #authentication_timeout = 1min # 1s-600s
76 ssl = true # (change requires restart)
77 #ssl_ciphers = 'ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH' # allowed SSL ciphers
78 # (change requires restart)
79 #password_encryption = on
80 #db_user_namespace = off
83 #krb_server_keyfile = '' # (change requires restart)
84 #krb_srvname = 'postgres' # (change requires restart, Kerberos only)
85 #krb_server_hostname = '' # empty string matches any keytab entry
86 # (change requires restart, Kerberos only)
87 #krb_caseins_users = off # (change requires restart)
88 #krb_realm = '' # (change requires restart)
91 # see "man 7 tcp" for details
93 #tcp_keepalives_idle = 0 # TCP_KEEPIDLE, in seconds;
94 # 0 selects the system default
95 #tcp_keepalives_interval = 0 # TCP_KEEPINTVL, in seconds;
96 # 0 selects the system default
97 #tcp_keepalives_count = 0 # TCP_KEEPCNT;
98 # 0 selects the system default
101 #------------------------------------------------------------------------------
102 # RESOURCE USAGE (except WAL)
103 #------------------------------------------------------------------------------
107 shared_buffers = 24MB # min 128kB or max_connections*16kB
108 # (change requires restart)
109 #temp_buffers = 8MB # min 800kB
110 #max_prepared_transactions = 5 # can be 0 or more
111 # (change requires restart)
112 # Note: Increasing max_prepared_transactions costs ~600 bytes of shared memory
113 # per transaction slot, plus lock space (see max_locks_per_transaction).
114 #work_mem = 1MB # min 64kB
115 #maintenance_work_mem = 16MB # min 1MB
116 #max_stack_depth = 2MB # min 100kB
120 max_fsm_pages = 153600 # min max_fsm_relations*16, 6 bytes each
121 # (change requires restart)
122 #max_fsm_relations = 1000 # min 100, ~70 bytes each
123 # (change requires restart)
125 # - Kernel Resource Usage -
127 #max_files_per_process = 1000 # min 25
128 # (change requires restart)
129 #shared_preload_libraries = '' # (change requires restart)
131 # - Cost-Based Vacuum Delay -
133 #vacuum_cost_delay = 0 # 0-1000 milliseconds
134 #vacuum_cost_page_hit = 1 # 0-10000 credits
135 #vacuum_cost_page_miss = 10 # 0-10000 credits
136 #vacuum_cost_page_dirty = 20 # 0-10000 credits
137 #vacuum_cost_limit = 200 # 1-10000 credits
139 # - Background Writer -
141 #bgwriter_delay = 200ms # 10-10000ms between rounds
142 #bgwriter_lru_maxpages = 100 # 0-1000 max buffers written/round
143 #bgwriter_lru_multiplier = 2.0 # 0-10.0 multipler on buffers scanned/round
146 #------------------------------------------------------------------------------
148 #------------------------------------------------------------------------------
152 #fsync = on # turns forced synchronization on or off
153 #synchronous_commit = on # immediate fsync at commit
154 #wal_sync_method = fsync # the default is the first option
155 # supported by the operating system:
161 #full_page_writes = on # recover from partial page writes
162 #wal_buffers = 64kB # min 32kB
163 # (change requires restart)
164 #wal_writer_delay = 200ms # 1-10000 milliseconds
166 #commit_delay = 0 # range 0-100000, in microseconds
167 #commit_siblings = 5 # range 1-1000
171 #checkpoint_segments = 3 # in logfile segments, min 1, 16MB each
172 #checkpoint_timeout = 5min # range 30s-1h
173 #checkpoint_completion_target = 0.5 # checkpoint target duration, 0.0 - 1.0
174 #checkpoint_warning = 30s # 0 is off
178 #archive_mode = off # allows archiving to be done
179 # (change requires restart)
180 #archive_command = '' # command to use to archive a logfile segment
181 #archive_timeout = 0 # force a logfile segment switch after this
185 #------------------------------------------------------------------------------
187 #------------------------------------------------------------------------------
189 # - Planner Method Configuration -
191 #enable_bitmapscan = on
193 #enable_hashjoin = on
194 #enable_indexscan = on
195 #enable_mergejoin = on
196 #enable_nestloop = on
201 # - Planner Cost Constants -
203 #seq_page_cost = 1.0 # measured on an arbitrary scale
204 #random_page_cost = 4.0 # same scale as above
205 #cpu_tuple_cost = 0.01 # same scale as above
206 #cpu_index_tuple_cost = 0.005 # same scale as above
207 #cpu_operator_cost = 0.0025 # same scale as above
208 #effective_cache_size = 128MB
210 # - Genetic Query Optimizer -
214 #geqo_effort = 5 # range 1-10
215 #geqo_pool_size = 0 # selects default based on effort
216 #geqo_generations = 0 # selects default based on effort
217 #geqo_selection_bias = 2.0 # range 1.5-2.0
219 # - Other Planner Options -
221 #default_statistics_target = 10 # range 1-1000
222 #constraint_exclusion = off
223 #from_collapse_limit = 8
224 #join_collapse_limit = 8 # 1 disables collapsing of explicit
228 #------------------------------------------------------------------------------
229 # ERROR REPORTING AND LOGGING
230 #------------------------------------------------------------------------------
234 #log_destination = 'stderr' # Valid values are combinations of
235 # stderr, csvlog, syslog and eventlog,
236 # depending on platform. csvlog
237 # requires logging_collector to be on.
239 # This is used when logging to stderr:
240 #logging_collector = off # Enable capturing of stderr and csvlog
241 # into log files. Required to be on for
243 # (change requires restart)
245 # These are only used if logging_collector is on:
246 #log_directory = 'pg_log' # directory where log files are written,
247 # can be absolute or relative to PGDATA
248 #log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' # log file name pattern,
249 # can include strftime() escapes
250 #log_truncate_on_rotation = off # If on, an existing log file of the
251 # same name as the new log file will be
252 # truncated rather than appended to.
253 # But such truncation only occurs on
254 # time-driven rotation, not on restarts
255 # or size-driven rotation. Default is
256 # off, meaning append to existing files
258 #log_rotation_age = 1d # Automatic rotation of logfiles will
259 # happen after that time. 0 to disable.
260 #log_rotation_size = 10MB # Automatic rotation of logfiles will
261 # happen after that much log output.
264 # These are relevant when logging to syslog:
265 #syslog_facility = 'LOCAL0'
266 #syslog_ident = 'postgres'
271 #client_min_messages = notice # values in order of decreasing detail:
282 #log_min_messages = notice # values in order of decreasing detail:
296 #log_error_verbosity = default # terse, default, or verbose messages
298 #log_min_error_statement = error # values in order of decreasing detail:
310 # panic (effectively off)
312 #log_min_duration_statement = -1 # -1 is disabled, 0 logs all statements
313 # and their durations, > 0 logs only
314 # statements running at least this time.
316 #silent_mode = off # DO NOT USE without syslog or
318 # (change requires restart)
322 #debug_print_parse = off
323 #debug_print_rewritten = off
324 #debug_print_plan = off
325 #debug_pretty_print = off
326 #log_checkpoints = off
327 #log_connections = off
328 #log_disconnections = off
331 log_line_prefix = '%t ' # special values:
334 # %r = remote host and port
337 # %t = timestamp without milliseconds
338 # %m = timestamp with milliseconds
341 # %l = session line number
342 # %s = session start timestamp
343 # %v = virtual transaction ID
344 # %x = transaction ID (0 if none)
345 # %q = stop here in non-session
349 #log_lock_waits = off # log lock waits >= deadlock_timeout
350 #log_statement = 'none' # none, ddl, mod, all
351 #log_temp_files = -1 # log temporary files equal or larger
352 # than specified size;
353 # -1 disables, 0 logs all temp files
354 #log_timezone = unknown # actually, defaults to TZ environment
358 #------------------------------------------------------------------------------
360 #------------------------------------------------------------------------------
362 # - Query/Index Statistics Collector -
364 #track_activities = on
366 #update_process_title = on
369 # - Statistics Monitoring -
371 #log_parser_stats = off
372 #log_planner_stats = off
373 #log_executor_stats = off
374 #log_statement_stats = off
377 #------------------------------------------------------------------------------
378 # AUTOVACUUM PARAMETERS
379 #------------------------------------------------------------------------------
381 #autovacuum = on # Enable autovacuum subprocess? 'on'
382 # requires track_counts to also be on.
383 #log_autovacuum_min_duration = -1 # -1 disables, 0 logs all actions and
384 # their durations, > 0 logs only
385 # actions running at least that time.
386 #autovacuum_max_workers = 3 # max number of autovacuum subprocesses
387 #autovacuum_naptime = 1min # time between autovacuum runs
388 #autovacuum_vacuum_threshold = 50 # min number of row updates before
390 #autovacuum_analyze_threshold = 50 # min number of row updates before
392 #autovacuum_vacuum_scale_factor = 0.2 # fraction of table size before vacuum
393 #autovacuum_analyze_scale_factor = 0.1 # fraction of table size before analyze
394 #autovacuum_freeze_max_age = 200000000 # maximum XID age before forced vacuum
395 # (change requires restart)
396 #autovacuum_vacuum_cost_delay = 20 # default vacuum cost delay for
397 # autovacuum, -1 means use
399 #autovacuum_vacuum_cost_limit = -1 # default vacuum cost limit for
400 # autovacuum, -1 means use
404 #------------------------------------------------------------------------------
405 # CLIENT CONNECTION DEFAULTS
406 #------------------------------------------------------------------------------
408 # - Statement Behavior -
410 #search_path = '"$user",public' # schema names
411 #default_tablespace = '' # a tablespace name, '' uses the default
412 #temp_tablespaces = '' # a list of tablespace names, '' uses
413 # only default tablespace
414 #check_function_bodies = on
415 #default_transaction_isolation = 'read committed'
416 #default_transaction_read_only = off
417 #session_replication_role = 'origin'
418 #statement_timeout = 0 # 0 is disabled
419 #vacuum_freeze_min_age = 100000000
420 #xmlbinary = 'base64'
421 #xmloption = 'content'
423 # - Locale and Formatting -
425 datestyle = 'iso, mdy'
426 #timezone = unknown # actually, defaults to TZ environment
428 #timezone_abbreviations = 'Default' # Select the set of available time zone
429 # abbreviations. Currently, there are
433 # You can create your own file in
434 # share/timezonesets/.
435 #extra_float_digits = 0 # min -15, max 2
436 #client_encoding = sql_ascii # actually, defaults to database
439 # These settings are initialized by initdb, but they can be changed.
440 lc_messages = 'C' # locale for system error message
442 lc_monetary = 'C' # locale for monetary formatting
443 lc_numeric = 'C' # locale for number formatting
444 lc_time = 'C' # locale for time formatting
446 # default configuration for text search
447 default_text_search_config = 'pg_catalog.english'
451 #explain_pretty_print = on
452 #dynamic_library_path = '$libdir'
453 #local_preload_libraries = ''
456 #------------------------------------------------------------------------------
458 #------------------------------------------------------------------------------
460 #deadlock_timeout = 1s
461 #max_locks_per_transaction = 64 # min 10
462 # (change requires restart)
463 # Note: Each lock table slot uses ~270 bytes of shared memory, and there are
464 # max_locks_per_transaction * (max_connections + max_prepared_transactions)
468 #------------------------------------------------------------------------------
469 # VERSION/PLATFORM COMPATIBILITY
470 #------------------------------------------------------------------------------
472 # - Previous PostgreSQL Versions -
474 #add_missing_from = off
476 #backslash_quote = safe_encoding # on, off, or safe_encoding
477 #default_with_oids = off
478 #escape_string_warning = on
479 #regex_flavor = advanced # advanced, extended, or basic
480 #sql_inheritance = on
481 #standard_conforming_strings = off
482 #synchronize_seqscans = on
484 # - Other Platforms and Clients -
486 #transform_null_equals = off
489 #------------------------------------------------------------------------------
491 #------------------------------------------------------------------------------
493 #custom_variable_classes = '' # list of custom variable class names