HandsOnPostgreSQL: postgresql.conf

File postgresql.conf, 14.9 KB (added by tigran, 14 years ago)
Line 
1# -----------------------------
2# PostgreSQL configuration file
3# -----------------------------
4#
5# This file consists of lines of the form:
6#
7#   name = value
8#
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.
13#
14# Please note that re-commenting a setting is NOT sufficient to revert it
15# to the default value, unless you restart the server.
16#
17# Any option can also be given as a command line switch to the server,
18# e.g., 'postgres -c log_connections=on'.  Some options can be changed at
19# run-time with the 'SET' SQL command.
20#
21# This file is read on server startup and when the server receives a
22# SIGHUP.  If you edit the file on a running system, you have to SIGHUP the
23# server for the changes to take effect, or use "pg_ctl reload". Some
24# settings, which are marked below, require a server shutdown and restart
25# to take effect.
26#
27# Memory units:  kB = kilobytes MB = megabytes GB = gigabytes
28# Time units:    ms = milliseconds s = seconds min = minutes h = hours d = days
29
30
31#---------------------------------------------------------------------------
32# FILE LOCATIONS
33#---------------------------------------------------------------------------
34
35# The default values of these variables are driven from the -D command line
36# switch or PGDATA environment variable, represented here as ConfigDir.
37
38#data_directory = 'ConfigDir'           # use data in another directory
39                                        # (change requires restart)
40#hba_file = 'ConfigDir/pg_hba.conf'     # host-based authentication file
41                                        # (change requires restart)
42#ident_file = 'ConfigDir/pg_ident.conf' # ident configuration file
43                                        # (change requires restart)
44
45# If external_pid_file is not explicitly set, no extra PID file is written.
46#external_pid_file = '(none)'           # write an extra PID file
47                                        # (change requires restart)
48
49
50#---------------------------------------------------------------------------
51# CONNECTIONS AND AUTHENTICATION
52#---------------------------------------------------------------------------
53
54# - Connection Settings -
55
56listen_addresses = '*'          # what IP address(es) to listen on;
57                                        # comma-separated list of addresses;
58                                        # defaults to 'localhost', '*' = all
59                                        # (change requires restart)
60port = 5432                             # (change requires restart)
61max_connections = 1024                  # (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
64# might also need to raise shared_buffers to support more connections.
65#superuser_reserved_connections = 3     # (change requires restart)
66#unix_socket_directory = ''             # (change requires restart)
67#unix_socket_group = ''                 # (change requires restart)
68#unix_socket_permissions = 0777         # octal
69                                        # (change requires restart)
70#bonjour_name = ''                      # defaults to the computer name
71                                        # (change requires restart)
72
73# - Security & Authentication -
74
75#authentication_timeout = 1min          # 1s-600s
76#ssl = off                              # (change requires restart)
77#password_encryption = on
78#db_user_namespace = off
79
80# Kerberos
81#krb_server_keyfile = ''                # (change requires restart)
82#krb_srvname = 'postgres'               # (change requires restart)
83#krb_server_hostname = ''               # empty string matches any keytab entry
84                                        # (change requires restart)
85#krb_caseins_users = off                # (change requires restart)
86
87# - TCP Keepalives -
88# see 'man 7 tcp' for details
89
90#tcp_keepalives_idle = 0                # TCP_KEEPIDLE, in seconds;
91                                        # 0 selects the system default
92#tcp_keepalives_interval = 0            # TCP_KEEPINTVL, in seconds;
93                                        # 0 selects the system default
94#tcp_keepalives_count = 0               # TCP_KEEPCNT;
95                                        # 0 selects the system default
96
97
98#---------------------------------------------------------------------------
99# RESOURCE USAGE (except WAL)
100#---------------------------------------------------------------------------
101
102# - Memory -
103
104shared_buffers = 512MB          # min 128kB or max_connections*16kB
105                                        # (change requires restart)
106temp_buffers = 128MB                    # min 800kB
107#max_prepared_transactions = 5          # can be 0 or more
108                                        # (change requires restart)
109# Note: increasing max_prepared_transactions costs ~600 bytes of shared memory
110# per transaction slot, plus lock space (see max_locks_per_transaction).
111work_mem = 128MB                                # min 64kB
112maintenance_work_mem = 512MB            # min 1MB
113max_stack_depth = 8MB                   # min 100kB
114
115# - Free Space Map -
116
117max_fsm_pages = 153600          # min max_fsm_relations*16, 6 bytes each
118                                        # (change requires restart)
119#max_fsm_relations = 1000               # min 100, ~70 bytes each
120                                        # (change requires restart)
121
122# - Kernel Resource Usage -
123
124#max_files_per_process = 1000           # min 25
125                                        # (change requires restart)
126#shared_preload_libraries = ''          # (change requires restart)
127
128# - Cost-Based Vacuum Delay -
129
130#vacuum_cost_delay = 0                  # 0-1000 milliseconds
131#vacuum_cost_page_hit = 1               # 0-10000 credits
132#vacuum_cost_page_miss = 10             # 0-10000 credits
133#vacuum_cost_page_dirty = 20            # 0-10000 credits
134#vacuum_cost_limit = 200                # 0-10000 credits
135
136# - Background writer -
137
138#bgwriter_delay = 200ms                 # 10-10000ms between rounds
139#bgwriter_lru_percent = 1.0             # 0-100% of LRU buffers scanned/round
140#bgwriter_lru_maxpages = 5              # 0-1000 buffers max written/round
141#bgwriter_all_percent = 0.333           # 0-100% of all buffers scanned/round
142#bgwriter_all_maxpages = 5              # 0-1000 buffers max written/round
143
144
145#---------------------------------------------------------------------------
146# WRITE AHEAD LOG
147#---------------------------------------------------------------------------
148
149# - Settings -
150
151#fsync = on                             # turns forced synchronization on or off
152#wal_sync_method = fsync                # the default is the first option
153                                        # supported by the operating system:
154                                        #   open_datasync
155                                        #   fdatasync
156                                        #   fsync
157                                        #   fsync_writethrough
158                                        #   open_sync
159#full_page_writes = on                  # recover from partial page writes
160#wal_buffers = 64kB                     # min 32kB
161                                        # (change requires restart)
162#commit_delay = 0                       # range 0-100000, in microseconds
163#commit_siblings = 5                    # range 1-1000
164
165# - Checkpoints -
166
167#checkpoint_segments = 3                # in logfile segments, min 1, 16MB each
168#checkpoint_timeout = 5min              # range 30s-1h
169#checkpoint_warning = 30s               # 0 is off
170
171# - Archiving -
172
173#archive_command = ''           # command to use to archive a logfile segment
174#archive_timeout = 0            # force a logfile segment switch after this
175                                # many seconds; 0 is off
176
177
178#---------------------------------------------------------------------------
179# QUERY TUNING
180#---------------------------------------------------------------------------
181
182# - Planner Method Configuration -
183
184#enable_bitmapscan = on
185#enable_hashagg = on
186#enable_hashjoin = on
187#enable_indexscan = on
188#enable_mergejoin = on
189#enable_nestloop = on
190#enable_seqscan = on
191#enable_sort = on
192#enable_tidscan = on
193
194# - Planner Cost Constants -
195
196#seq_page_cost = 1.0                    # measured on an arbitrary scale
197random_page_cost = 2.0                  # same scale as above
198#cpu_tuple_cost = 0.01                  # same scale as above
199#cpu_index_tuple_cost = 0.005           # same scale as above
200#cpu_operator_cost = 0.0025             # same scale as above
201effective_cache_size = 8GB
202
203# - Genetic Query Optimizer -
204
205#geqo = on
206#geqo_threshold = 12
207#geqo_effort = 5                        # range 1-10
208#geqo_pool_size = 0                     # selects default based on effort
209#geqo_generations = 0                   # selects default based on effort
210#geqo_selection_bias = 2.0              # range 1.5-2.0
211
212# - Other Planner Options -
213
214#default_statistics_target = 10         # range 1-1000
215#constraint_exclusion = off
216#from_collapse_limit = 8
217#join_collapse_limit = 8                # 1 disables collapsing of explicit
218                                        # JOINs
219
220
221#---------------------------------------------------------------------------
222# ERROR REPORTING AND LOGGING
223#---------------------------------------------------------------------------
224
225# - Where to Log -
226
227#log_destination = 'stderr'             # Valid values are combinations of
228                                        # stderr, syslog and eventlog,
229                                        # depending on platform.
230
231# This is used when logging to stderr:
232redirect_stderr = on                    # Enable capturing of stderr into log
233                                        # files
234                                        # (change requires restart)
235
236# These are only used if redirect_stderr is on:
237log_directory = 'pg_log'                # Directory where log files are written
238                                        # Can be absolute or relative to PGDATA
239log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' # Log file name pattern.
240                                        # Can include strftime() escapes
241#log_truncate_on_rotation = off # If on, any existing log file of the same
242                                        # name as the new log file will be
243                                        # truncated rather than appended to. But
244                                        # such truncation only occurs on
245                                        # time-driven rotation, not on restarts
246                                        # or size-driven rotation. Default is
247                                        # off, meaning append to existing files
248                                        # in all cases.
249log_rotation_age = 0                    # Automatic rotation of logfiles will
250                                        # happen after that time.  0 to
251                                        # disable.
252log_rotation_size = 100MB               # Automatic rotation of logfiles will
253                                        # happen after that much log
254                                        # output.  0 to disable.
255
256# These are relevant when logging to syslog:
257#syslog_facility = 'LOCAL0'
258#syslog_ident = 'postgres'
259
260
261# - When to Log -
262
263#client_min_messages = notice           # Values, in order of decreasing detail:
264                                        #   debug5
265                                        #   debug4
266                                        #   debug3
267                                        #   debug2
268                                        #   debug1
269                                        #   log
270                                        #   notice
271                                        #   warning
272                                        #   error
273
274#log_min_messages = notice              # Values, in order of decreasing detail:
275                                        #   debug5
276                                        #   debug4
277                                        #   debug3
278                                        #   debug2
279                                        #   debug1
280                                        #   info
281                                        #   notice
282                                        #   warning
283                                        #   error
284                                        #   log
285                                        #   fatal
286                                        #   panic
287
288log_error_verbosity = default           # terse, default, or verbose messages
289
290#log_min_error_statement = error        # Values in order of increasing severity:
291                                        #   debug5
292                                        #   debug4
293                                        #   debug3
294                                        #   debug2
295                                        #   debug1
296                                        #   info
297                                        #   notice
298                                        #   warning
299                                        #   error
300                                        #   fatal
301                                        #   panic (effectively off)
302
303log_min_duration_statement = 0  # -1 is disabled, 0 logs all statements
304                                        # and their durations.
305
306#silent_mode = off                      # DO NOT USE without syslog or
307                                        # redirect_stderr
308                                        # (change requires restart)
309
310# - What to Log -
311
312#debug_print_parse = off
313#debug_print_rewritten = off
314#debug_print_plan = off
315#debug_pretty_print = off
316#log_connections = off
317#log_disconnections = off
318log_duration = on
319log_line_prefix = '%t [%p]: [%l-1] '    # Special values:
320                                        #   %u = user name
321                                        #   %d = database name
322                                        #   %r = remote host and port
323                                        #   %h = remote host
324                                        #   %p = PID
325                                        #   %t = timestamp (no milliseconds)
326                                        #   %m = timestamp with milliseconds
327                                        #   %i = command tag
328                                        #   %c = session id
329                                        #   %l = session line number
330                                        #   %s = session start timestamp
331                                        #   %x = transaction id
332                                        #   %q = stop here in non-session
333                                        #        processes
334                                        #   %% = '%'
335                                        # e.g. '<%u%%%d> '
336log_statement = all                     # none, ddl, mod, all
337#log_hostname = off
338
339
340#---------------------------------------------------------------------------
341# RUNTIME STATISTICS
342#---------------------------------------------------------------------------
343
344# - Query/Index Statistics Collector -
345
346#stats_command_string = on
347#update_process_title = on
348
349stats_start_collector = on              # needed for block or row stats
350                                        # (change requires restart)
351stats_block_level = on
352stats_row_level = on
353#stats_reset_on_server_start = off      # (change requires restart)
354
355
356# - Statistics Monitoring -
357
358#log_parser_stats = off
359#log_planner_stats = off
360#log_executor_stats = off
361#log_statement_stats = off
362
363
364#---------------------------------------------------------------------------
365# AUTOVACUUM PARAMETERS
366#---------------------------------------------------------------------------
367
368autovacuum = on                 # enable autovacuum subprocess?
369                                        # 'on' requires stats_start_collector
370                                        # and stats_row_level to also be on
371autovacuum_naptime = 10min              # time between autovacuum runs
372autovacuum_vacuum_threshold = 5000      # min # of tuple updates before
373                                        # vacuum
374autovacuum_analyze_threshold = 2500     # min # of tuple updates before
375                                        # analyze
376#autovacuum_vacuum_scale_factor = 0.2   # fraction of rel size before
377                                        # vacuum
378#autovacuum_analyze_scale_factor = 0.1  # fraction of rel size before
379                                        # analyze
380#autovacuum_freeze_max_age = 200000000  # maximum XID age before forced vacuum
381                                        # (change requires restart)
382#autovacuum_vacuum_cost_delay = -1      # default vacuum cost delay for
383                                        # autovacuum, -1 means use
384                                        # vacuum_cost_delay
385#autovacuum_vacuum_cost_limit = -1      # default vacuum cost limit for
386                                        # autovacuum, -1 means use
387                                        # vacuum_cost_limit
388
389
390#---------------------------------------------------------------------------
391# CLIENT CONNECTION DEFAULTS
392#---------------------------------------------------------------------------
393
394# - Statement Behavior -
395
396#search_path = '"$user",public'         # schema names
397#default_tablespace = ''                # a tablespace name, '' uses
398                                        # the default
399#check_function_bodies = on
400#default_transaction_isolation = 'read committed'
401#default_transaction_read_only = off
402#statement_timeout = 0                  # 0 is disabled
403#vacuum_freeze_min_age = 100000000
404
405# - Locale and Formatting -
406
407datestyle = 'iso, mdy'
408#timezone = unknown                     # actually, defaults to TZ
409                                        # environment setting
410#timezone_abbreviations = 'Default'     # select the set of available timezone
411                                        # abbreviations. Currently, there are
412                                        #   Default
413                                        #   Australia
414                                        #   India
415                                        # However you can also create your own
416                                        # file in share/timezonesets/.
417#extra_float_digits = 0                 # min -15, max 2
418#client_encoding = sql_ascii            # actually, defaults to database
419                                        # encoding
420
421# These settings are initialized by initdb -- they might be changed
422lc_messages = 'C'                       # locale for system error message
423                                        # strings
424lc_monetary = 'C'                       # locale for monetary formatting
425lc_numeric = 'C'                        # locale for number formatting
426lc_time = 'C'                           # locale for time formatting
427
428# - Other Defaults -
429
430#explain_pretty_print = on
431#dynamic_library_path = '$libdir'
432#local_preload_libraries = ''
433
434
435#---------------------------------------------------------------------------
436# LOCK MANAGEMENT
437#---------------------------------------------------------------------------
438
439#deadlock_timeout = 1s
440#max_locks_per_transaction = 64         # min 10
441                                        # (change requires restart)
442# Note: each lock table slot uses ~270 bytes of shared memory, and there are
443# max_locks_per_transaction * (max_connections + max_prepared_transactions)
444# lock table slots.
445
446
447#---------------------------------------------------------------------------
448# VERSION/PLATFORM COMPATIBILITY
449#---------------------------------------------------------------------------
450
451# - Previous Postgres Versions -
452
453#add_missing_from = off
454#array_nulls = on
455#backslash_quote = safe_encoding        # on, off, or safe_encoding
456#default_with_oids = off
457#escape_string_warning = on
458#standard_conforming_strings = off
459#regex_flavor = advanced                # advanced, extended, or basic
460#sql_inheritance = on
461
462# - Other Platforms & Clients -
463
464#transform_null_equals = off
465
466
467#---------------------------------------------------------------------------
468# CUSTOMIZED OPTIONS
469#---------------------------------------------------------------------------
470
471#custom_variable_classes = ''           # list of custom variable class names