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

# 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 = '/var/lib/postgresql/9.1/main'		# use data in another directory

					# (change requires restart)

hba_file = '/etc/postgresql/9.1/main/pg_hba.conf'	# host-based authentication file

					# (change requires restart)

ident_file = '/etc/postgresql/9.1/main/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 = '/var/run/postgresql/9.1-main.pid'		# write an extra PID file

					# (change requires restart)

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

# CONNECTIONS AND AUTHENTICATION

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

# - Connection Settings -

listen_addresses = '*'			# 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 = '/var/run/postgresql'		# (change requires restart)

#unix_socket_group = ''			# (change requires restart)

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

					# (change requires restart)

#bonjour_name = ''			# defaults to the computer name

					# (change requires restart)

# - Security and Authentication -

#authentication_timeout = 1min		# 1s-600s

ssl = true				# (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 -

# Set to slightly less than SHMMAX = 3.9GB

shared_buffers = 3900MB			# 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 = 256MB				# min 64kB

#work_mem = 1MB				# min 64kB

maintenance_work_mem = 256MB		# min 1MB

#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 -

#fsync = on				# turns forced synchronization on or off

##### WARNING: Switching this off may cause data loss.

# It is used to improve performance with frequent commits. Each datasource makes

# ~10 commits/sec (which will hopefully increase after optimization), and there

# can be 10+ datasources running simultaneously, so the 100 commit/sec limit may

# be exceeded. See synchronous_commit at

# <http://wiki.postgresql.org/wiki/Tuning_Your_PostgreSQL_Server#synchronous_commit>

#####

synchronous_commit = off		# immediate fsync at commit

#wal_sync_method = fsync		# the default is the first option 

					# supported by the operating system:

					#   open_datasync

					#   fdatasync

					#   fsync

					#   fsync_writethrough

					#   open_sync

#full_page_writes = on			# recover from partial page writes

#wal_buffers = 64kB			# min 32kB

					# (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

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

# QUERY TUNING

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

# - Planner Method Configuration -

#enable_bitmapscan = on

#enable_hashagg = on

#enable_hashjoin = on

#enable_indexscan = 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 = 12GB

#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

# - 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 = '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_truncate_on_rotation = off		# If on, an existing log file of 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 = 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_error_verbosity = default		# terse, default, or verbose messages

#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_hostname = off

log_line_prefix = '%t '			# special values:

					#   %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

					#   %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 = unknown			# actually, defaults to TZ 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

#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

#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

#session_replication_role = 'origin'

#statement_timeout = 0			# in milliseconds, 0 is disabled

#vacuum_freeze_min_age = 50000000

#vacuum_freeze_table_age = 150000000

#xmlbinary = 'base64'

#xmloption = 'content'

# - Locale and Formatting -

datestyle = 'iso, mdy'

#intervalstyle = 'postgres'

#timezone = unknown			# actually, defaults to TZ 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 2

#client_encoding = sql_ascii		# actually, defaults to database

					# encoding

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

lc_messages = 'en_US.UTF-8'			# locale for system error message

					# strings

lc_monetary = 'en_US.UTF-8'			# locale for monetary formatting

lc_numeric = 'en_US.UTF-8'			# locale for number formatting

lc_time = 'en_US.UTF-8'				# 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.

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

# VERSION/PLATFORM COMPATIBILITY

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

# - Previous PostgreSQL Versions -

#add_missing_from = off

#array_nulls = on

#backslash_quote = safe_encoding	# on, off, or safe_encoding

#default_with_oids = off

#escape_string_warning = on

#regex_flavor = advanced		# advanced, extended, or basic

#sql_inheritance = on

#standard_conforming_strings = off

#synchronize_seqscans = on

# - Other Platforms and Clients -

#transform_null_equals = off

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

# CUSTOMIZED OPTIONS

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

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