Postgresql 9.1 配置文件，多了好多东西耶，一起学习一下

2011.9.12 Postgresql 9.1 出来了

Postgresql 9.1 配置文件，多了好多东西耶，一起学习一下

# -----------------------------

# PostgreSQL configuration file

# -----------------------------

#

# This file consists of lines of the form:

#

# name = value

#

# (The "=" is optional.) Whitespace may be used. Comments are introduced with

# "#" anywhere on a line. The complete list of parameter names and allowed

# values can be found in the PostgreSQL documentation.

#

# The commented-out settings shown in this file represent the default values.

# Re-commenting a setting is NOT sufficient to revert it to the default value;

# you need to reload the server.

#

# This file is read on server startup and when the server receives a SIGHUP

# signal. If you edit the file on a running system, you have to SIGHUP the

# server for the changes to take effect, or use "pg_ctl reload". Some

# parameters, which are marked below, require a server shutdown and restart to

# take effect.

#

# Any parameter can also be given as a command-line option to the server, e.g.,

# "postgres -c log_connections=on". Some parameters can be changed at run time

# with the "SET" SQL command.

#

# Memory units: kB = kilobytes Time units: ms = milliseconds

# MB = megabytes s = seconds

# GB = gigabytes min = minutes

# h = hours

# d = days

#------------------------------------------------------------------------------

# FILE LOCATIONS

#------------------------------------------------------------------------------

# The default values of these variables are driven from the -D command-line

# option or PGDATA environment variable, represented here as ConfigDir.

#data_directory = 'ConfigDir' # use data in another directory

# (change requires restart)

#hba_file = 'ConfigDir/pg_hba.conf' # host-based authentication file

# (change requires restart)

#ident_file = 'ConfigDir/pg_ident.conf' # ident configuration file

# (change requires restart)

# If external_pid_file is not explicitly set, no extra PID file is written.

#external_pid_file = '(none)' # write an extra PID file

# (change requires restart)

#------------------------------------------------------------------------------

# CONNECTIONS AND AUTHENTICATION

#------------------------------------------------------------------------------

# - Connection Settings -

#listen_addresses = 'localhost' # what IP address(es) to listen on;

# comma-separated list of addresses;

# defaults to 'localhost', '*' = all

# (change requires restart)

#port = 5432 # (change requires restart)

max_connections = 100 # (change requires restart)

# Note: Increasing max_connections costs ~400 bytes of shared memory per

# connection slot, plus lock space (see max_locks_per_transaction).

#superuser_reserved_connections = 3 # (change requires restart)

#unix_socket_directory = '' # (change requires restart)

#unix_socket_group = '' # (change requires restart)

#unix_socket_permissions = 0777 # begin with 0 to use octal notation

# (change requires restart)

#bonjour = off # advertise server via Bonjour

# (change requires restart)

#bonjour_name = '' # defaults to the computer name

# (change requires restart)

# - Security and Authentication -

#authentication_timeout = 1min # 1s-600s

#ssl = off # (change requires restart)

#ssl_ciphers = 'ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH'
# allowed SSL ciphers

# (change requires restart)

#ssl_renegotiation_limit = 512MB # amount of data between renegotiations

#password_encryption = on

#db_user_namespace = off

# Kerberos and GSSAPI

#krb_server_keyfile = ''

#krb_srvname = 'postgres' # (Kerberos only)

#krb_caseins_users = off

# - TCP Keepalives -

# see "man 7 tcp" for details

#tcp_keepalives_idle = 0 # TCP_KEEPIDLE, in seconds;

# 0 selects the system default

#tcp_keepalives_interval = 0 # TCP_KEEPINTVL, in seconds;

# 0 selects the system default

#tcp_keepalives_count = 0 # TCP_KEEPCNT;

# 0 selects the system default

#------------------------------------------------------------------------------

# RESOURCE USAGE (except WAL)

#------------------------------------------------------------------------------

# - Memory -

shared_buffers = 32MB # min 128kB

# (change requires restart)

#temp_buffers = 8MB # min 800kB

#max_prepared_transactions = 0 # zero disables the feature

# (change requires restart)

# Note: Increasing max_prepared_transactions costs ~600 bytes of shared memory

# per transaction slot, plus lock space (see max_locks_per_transaction).

# It is not advisable to set max_prepared_transactions nonzero unless you

# actively intend to use prepared transactions.

#work_mem = 1MB # min 64kB

#maintenance_work_mem = 16MB # min 1MB

#max_stack_depth = 2MB # min 100kB

# - Kernel Resource Usage -

#max_files_per_process = 1000 # min 25

# (change requires restart)

#shared_preload_libraries = '' # (change requires restart)

# - Cost-Based Vacuum Delay -

#vacuum_cost_delay = 0ms # 0-100 milliseconds

#vacuum_cost_page_hit = 1 # 0-10000 credits

#vacuum_cost_page_miss = 10 # 0-10000 credits

#vacuum_cost_page_dirty = 20 # 0-10000 credits

#vacuum_cost_limit = 200 # 1-10000 credits

# - Background Writer -

#bgwriter_delay = 200ms # 10-10000ms between rounds

#bgwriter_lru_maxpages = 100 # 0-1000 max buffers written/round

#bgwriter_lru_multiplier = 2.0 # 0-10.0 multipler on buffers scanned/round

# - Asynchronous Behavior -

#effective_io_concurrency = 1 # 1-1000. 0 disables prefetching

#------------------------------------------------------------------------------

# WRITE AHEAD LOG

#------------------------------------------------------------------------------

# - Settings -

#wal_level = minimal # minimal, archive, or hot_standby

# (change requires restart)

#fsync = on # turns forced synchronization on or off

#synchronous_commit = on # synchronization level; on, off, or local

#wal_sync_method = fsync # the default is the first option

# supported by the operating system:

# open_datasync

# fdatasync (default on Linux)

# fsync

# fsync_writethrough

# open_sync

#full_page_writes = on # recover from partial page writes

#wal_buffers = -1 # min 32kB, -1 sets based on shared_buffers

# (change requires restart)

#wal_writer_delay = 200ms # 1-10000 milliseconds

#commit_delay = 0 # range 0-100000, in microseconds

#commit_siblings = 5 # range 1-1000

# - Checkpoints -

#checkpoint_segments = 3 # in logfile segments, min 1, 16MB each

#checkpoint_timeout = 5min # range 30s-1h

#checkpoint_completion_target = 0.5 # checkpoint target duration, 0.0 - 1.0

#checkpoint_warning = 30s # 0 disables

# - Archiving -

#archive_mode = off # allows archiving to be done

# (change requires restart)

#archive_command = '' # command to use to archive a logfile segment

#archive_timeout = 0 # force a logfile segment switch after this

# number of seconds; 0 disables

#------------------------------------------------------------------------------

# REPLICATION

#------------------------------------------------------------------------------

# - Master Server -

# These settings are ignored on a standby server

#max_wal_senders = 0 # max number of walsender processes

# (change requires restart)

#wal_sender_delay = 1s # walsender cycle time, 1-10000 milliseconds

#wal_keep_segments = 0 # in logfile segments, 16MB each; 0 disables

#vacuum_defer_cleanup_age = 0 # number of xacts by which cleanup is delayed

#replication_timeout = 60s # in milliseconds; 0 disables

#synchronous_standby_names = '' # standby servers that provide sync rep

# comma-separated list of application_name

# from standby(s); '*' = all

# - Standby Servers -

# These settings are ignored on a master server

#hot_standby = off # "on" allows queries during recovery

# (change requires restart)

#max_standby_archive_delay = 30s # max delay before canceling queries

# when reading WAL from archive;

# -1 allows indefinite delay

#max_standby_streaming_delay = 30s # max delay before canceling queries

# when reading streaming WAL;

# -1 allows indefinite delay

#wal_receiver_status_interval = 10s # send replies at least this often

# 0 disables

#hot_standby_feedback = off # send info from standby to prevent

# query conflicts

#------------------------------------------------------------------------------

# QUERY TUNING

#------------------------------------------------------------------------------

# - Planner Method Configuration -

#enable_bitmapscan = on

#enable_hashagg = on

#enable_hashjoin = on

#enable_indexscan = on

#enable_material = on

#enable_mergejoin = on

#enable_nestloop = on

#enable_seqscan = on

#enable_sort = on

#enable_tidscan = on

# - Planner Cost Constants -

#seq_page_cost = 1.0 # measured on an arbitrary scale

#random_page_cost = 4.0 # same scale as above

#cpu_tuple_cost = 0.01 # same scale as above

#cpu_index_tuple_cost = 0.005 # same scale as above

#cpu_operator_cost = 0.0025 # same scale as above

#effective_cache_size = 128MB

# - Genetic Query Optimizer -

#geqo = on

#geqo_threshold = 12

#geqo_effort = 5 # range 1-10

#geqo_pool_size = 0 # selects default based on effort

#geqo_generations = 0 # selects default based on effort

#geqo_selection_bias = 2.0 # range 1.5-2.0

#geqo_seed = 0.0 # range 0.0-1.0

# - Other Planner Options -

#default_statistics_target = 100 # range 1-10000

#constraint_exclusion = partition # on, off, or partition

#cursor_tuple_fraction = 0.1 # range 0.0-1.0

#from_collapse_limit = 8

#join_collapse_limit = 8 # 1 disables collapsing of explicit

# JOIN clauses

#------------------------------------------------------------------------------

# ERROR REPORTING AND LOGGING

#------------------------------------------------------------------------------

# - Where to Log -

log_destination = 'syslog'

#log_destination = 'stderr' # Valid values are combinations of

# stderr, csvlog, syslog, and eventlog,

# depending on platform. csvlog

# requires logging_collector to be on.

# This is used when logging to stderr:

#logging_collector = off # Enable capturing of stderr and csvlog

# into log files. Required to be on for

# csvlogs.

# (change requires restart)

# These are only used if logging_collector is on:

#log_directory = 'pg_log' # directory where log files are written,

# can be absolute or relative to PGDATA

#log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log'
# log file name pattern,

# can include strftime() escapes

#log_file_mode = 0600 # creation mode for log files,

# begin with 0 to use octal notation

#log_truncate_on_rotation = off # If on, an existing log file with the

# same name as the new log file will be

# truncated rather than appended to.

# But such truncation only occurs on

# time-driven rotation, not on restarts

# or size-driven rotation. Default is

# off, meaning append to existing files

# in all cases.

#log_rotation_age = 1d # Automatic rotation of logfiles will

# happen after that time. 0 disables.

#log_rotation_size = 10MB # Automatic rotation of logfiles will

# happen after that much log output.

# 0 disables.

# These are relevant when logging to syslog:

#syslog_facility = 'LOCAL0'

#syslog_ident = 'postgres'

silent_mode = on

#silent_mode = off # Run server silently.

# DO NOT USE without syslog or

# logging_collector

# (change requires restart)

# - When to Log -

#client_min_messages = notice # values in order of decreasing detail:

# debug5

# debug4

# debug3

# debug2

# debug1

# log

# notice

# warning

# error

#log_min_messages = warning # values in order of decreasing detail:

# debug5

# debug4

# debug3

# debug2

# debug1

# info

# notice

# warning

# error

# log

# fatal

# panic

#log_min_error_statement = error # values in order of decreasing detail:

# debug5

# debug4

# debug3

# debug2

# debug1

# info

# notice

# warning

# error

# log

# fatal

# panic (effectively off)

#log_min_duration_statement = -1 # -1 is disabled, 0 logs all statements

# and their durations, > 0 logs only

# statements running at least this number

# of milliseconds

# - What to Log -

#debug_print_parse = off

#debug_print_rewritten = off

#debug_print_plan = off

#debug_pretty_print = on

#log_checkpoints = off

#log_connections = off

#log_disconnections = off

#log_duration = off

#log_error_verbosity = default # terse, default, or verbose messages

#log_hostname = off

#log_line_prefix = '' # special values:

# %a = application name

# %u = user name

# %d = database name

# %r = remote host and port

# %h = remote host

# %p = process ID

# %t = timestamp without milliseconds

# %m = timestamp with milliseconds

# %i = command tag

# %e = SQL state

# %c = session ID

# %l = session line number

# %s = session start timestamp

# %v = virtual transaction ID

# %x = transaction ID (0 if none)

# %q = stop here in non-session

# processes

# %% = '%'

# e.g. '<%u%%%d> '

#log_lock_waits = off # log lock waits >= deadlock_timeout

#log_statement = 'none' # none, ddl, mod, all

#log_temp_files = -1 # log temporary files equal or larger

# than the specified size in kilobytes;

# -1 disables, 0 logs all temp files

#log_timezone = '(defaults to server environment setting)'

#------------------------------------------------------------------------------

# RUNTIME STATISTICS

#------------------------------------------------------------------------------

# - Query/Index Statistics Collector -

#track_activities = on

#track_counts = on

#track_functions = none # none, pl, all

#track_activity_query_size = 1024 # (change requires restart)

# On FreeBSD, this is a performance hog, so keep it off if you need speed

update_process_title = off

#update_process_title = on

#stats_temp_directory = 'pg_stat_tmp'

# - Statistics Monitoring -

#log_parser_stats = off

#log_planner_stats = off

#log_executor_stats = off

#log_statement_stats = off

#------------------------------------------------------------------------------

# AUTOVACUUM PARAMETERS

#------------------------------------------------------------------------------

#autovacuum = on # Enable autovacuum subprocess? 'on'

# requires track_counts to also be on.

#log_autovacuum_min_duration = -1 # -1 disables, 0 logs all actions and

# their durations, > 0 logs only

# actions running at least this number

# of milliseconds.

#autovacuum_max_workers = 3 # max number of autovacuum subprocesses

# (change requires restart)

#autovacuum_naptime = 1min # time between autovacuum runs

#autovacuum_vacuum_threshold = 50 # min number of row updates before

# vacuum

#autovacuum_analyze_threshold = 50 # min number of row updates before

# analyze

#autovacuum_vacuum_scale_factor = 0.2 # fraction of table size before vacuum

#autovacuum_analyze_scale_factor = 0.1 # fraction of table size before analyze

#autovacuum_freeze_max_age = 200000000 # maximum XID age before forced vacuum

# (change requires restart)

#autovacuum_vacuum_cost_delay = 20ms # default vacuum cost delay for

# autovacuum, in milliseconds;

# -1 means use vacuum_cost_delay

#autovacuum_vacuum_cost_limit = -1 # default vacuum cost limit for

# autovacuum, -1 means use

# vacuum_cost_limit

#------------------------------------------------------------------------------

# CLIENT CONNECTION DEFAULTS

#------------------------------------------------------------------------------

# - Statement Behavior -

#search_path = '"$user",public' # schema names

#default_tablespace = '' # a tablespace name, '' uses the default

#temp_tablespaces = '' # a list of tablespace names, '' uses

# only default tablespace

#check_function_bodies = on

#default_transaction_isolation = 'read committed'

#default_transaction_read_only = off

#default_transaction_deferrable = off

#session_replication_role = 'origin'

#statement_timeout = 0 # in milliseconds, 0 is disabled

#vacuum_freeze_min_age = 50000000

#vacuum_freeze_table_age = 150000000

#bytea_output = 'hex' # hex, escape

#xmlbinary = 'base64'

#xmloption = 'content'

# - Locale and Formatting -

datestyle = 'iso, mdy'

#intervalstyle = 'postgres'

#timezone = '(defaults to server environment setting)'

#timezone_abbreviations = 'Default' # Select the set of available time zone

# abbreviations. Currently, there are

# Default

# Australia

# India

# You can create your own file in

# share/timezonesets/.

#extra_float_digits = 0 # min -15, max 3

#client_encoding = sql_ascii # actually, defaults to database

# encoding

# These settings are initialized by initdb, but they can be changed.

lc_messages = 'C' # locale for system error message

# strings

lc_monetary = 'C' # locale for monetary formatting

lc_numeric = 'C' # locale for number formatting

lc_time = 'C' # locale for time formatting

# default configuration for text search

default_text_search_config = 'pg_catalog.english'

# - Other Defaults -

#dynamic_library_path = '$libdir'

#local_preload_libraries = ''

#------------------------------------------------------------------------------

# LOCK MANAGEMENT

#------------------------------------------------------------------------------

#deadlock_timeout = 1s

#max_locks_per_transaction = 64 # min 10

# (change requires restart)

# Note: Each lock table slot uses ~270 bytes of shared memory, and there are

# max_locks_per_transaction * (max_connections + max_prepared_transactions)

# lock table slots.

#max_pred_locks_per_transaction = 64 # min 10

# (change requires restart)

#------------------------------------------------------------------------------

# VERSION/PLATFORM COMPATIBILITY

#------------------------------------------------------------------------------

# - Previous PostgreSQL Versions -

#array_nulls = on

#backslash_quote = safe_encoding # on, off, or safe_encoding

#default_with_oids = off

#escape_string_warning = on

#lo_compat_privileges = off

#quote_all_identifiers = off

#sql_inheritance = on

#standard_conforming_strings = on

#synchronize_seqscans = on

# - Other Platforms and Clients -

#transform_null_equals = off

#------------------------------------------------------------------------------

# ERROR HANDLING

#------------------------------------------------------------------------------

#exit_on_error = off # terminate session on any error?

#restart_after_crash = on # reinitialize after backend crash?

#------------------------------------------------------------------------------

# CUSTOMIZED OPTIONS

#------------------------------------------------------------------------------

#custom_variable_classes = '' # list of custom variable class names