postgresql.conf.sample

# -----------------------------
# 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.
#
# This file is read on server startup and when the server receives a
# SIGHUP.  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
# settings, 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 MB = megabytes GB = gigabytes
# Time units:    ms = milliseconds s = seconds min = minutes h = hours d = days


#---------------------------------------------------------------------------
# FILE LOCATIONS
#---------------------------------------------------------------------------

# The default values of these variables are driven from the -D command line
# switch 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 = '*'		# what IP address(es) to listen on;
					# comma-separated list of addresses;
					# defaults to '*', '*' = all
					# (change requires restart)

#port = 5432				# sets the database listener port for 
      					# a Greenplum instance. The master and 
					# each segment has its own port number. 
# note: Port numbers for the Greenplum system must also be changed in the
# gp_configuration catalog. See the Greenplum Database Administrator Guide 
# for instructions!
#
# WARNING: YOU MUST SHUT DOWN YOUR GREENPLUM SYSTEM BEFORE CHANGING 
# THE PORT NUMBER IN THIS FILE.

#max_connections = 200
# note: increasing max_connections costs ~400 bytes of shared memory per
# connection slot, plus lock space (see max_locks_per_transaction).  You
# might also need to raise shared_buffers to support more connections.
#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_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)
#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 = 128MB			# min 128kB or max_connections*16kB
					# (change requires restart)
#temp_buffers = 8MB			# min 800kB
max_prepared_transactions = 250		# can be 0 or more
					# (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).
#work_mem = 32MB			# min 64kB
#maintenance_work_mem = 64MB		# min 1MB
#max_stack_depth = 2MB			# min 100kB

# - Free Space Map -

#max_fsm_pages = 204800			# min max_fsm_relations*16, 6 bytes each
					# (change requires restart)
#max_fsm_relations = 1000		# min 100, ~70 bytes each
					# (change requires restart)

# - 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

#------------------------------------------------------------------------------
# QUERY TUNING
#------------------------------------------------------------------------------

# - Planner Method Configuration -

#enable_bitmapscan = on
#enable_indexscan = on
#enable_seqscan = on
#enable_tidscan = on

#enable_hashjoin = on
#enable_mergejoin = off
#enable_nestloop = off
#gp_enable_adaptive_nestloop = on

#gp_enable_multiphase_agg = on
#gp_enable_preunique = on
#gp_enable_agg_distinct = on
#gp_enable_agg_distinct_pruning = on
#enable_groupagg = on
#enable_hashagg = on
#gp_selectivity_damping_for_scans = on
#gp_selectivity_damping_for_joins = off


#gp_enable_sequential_window_plans = off

#enable_sort = on
#gp_enable_sort_limit = on
#gp_enable_sort_distinct = on

# - Planner Cost Constants -

#seq_page_cost = 1.0			# measured on an arbitrary scale
#random_page_cost = 100			# 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
#gp_motion_cost_per_row = 0.0  # (same) (if 0, 2*cpu_tuple_cost is used)

#effective_cache_size = 4MB

# - Other Planner Options -

#from_collapse_limit = 8
#join_collapse_limit = 8		# 1 disables collapsing of explicit
					# JOINs
#gp_segments_for_planner = 0     # if 0, actual number of segments is used

#gp_enable_direct_dispatch = on

optimizer_analyze_root_partition = on # stats collection on root partitions

#------------------------------------------------------------------------------
# ERROR REPORTING AND LOGGING
#------------------------------------------------------------------------------

# - Set gp_reraise_signal to on to generate core files on SIGSEGV

#gp_reraise_signal = off

# - Where to Log -

#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.

# - 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_prelim_plan = off
#debug_print_slice_table = off
#debug_print_plan = off
#debug_pretty_print = off
#log_connections = off
#log_disconnections = off
#log_duration = off
#log_hostname = off

#log_statement = 'none'			# none, mod, ddl, all
#log_temp_files = -1			# Log temporary files equal or larger
					# than the specified number of kilobytes.
					# -1 disables;  0 logs all temp files
#log_timezone = unknown			# actually, defaults to TZ environment
					# setting

#------------------------------------------------------------------------------
# PL/JAVA
#------------------------------------------------------------------------------
#pljava_classpath = ''                      # ':' separated list of installed jar files
#pljava_vmoptions = ''                      # Options sent to the JVM on startup
#pljava_statement_cache_size = 0            # Size of the prepared statement MRU cache
#pljava_release_lingering_savepoints = off  # on/off to release/abort lingering savepoints


#------------------------------------------------------------------------------
# PERFORMANCE MONITOR
#------------------------------------------------------------------------------

#gp_enable_gpperfmon=on		# Enable the performance monitor
#gpperfmon_port=8888		# Port used the the performance monitor daemons

										
#------------------------------------------------------------------------------
# EMAIL ALERTS
#------------------------------------------------------------------------------

# Configure the DNS name of the SMTP server you want to use,
# the port it runs on (which will be either 25 or 587), and
# the SASL authentication information used to connect to it.

#gp_email_smtp_server = 'localhost:25'      # SMTP server hostname and port (don't forget the port!)
#gp_email_smtp_userid = ''					# Userid used to authenticate with SMTP server, if needed
#gp_email_smtp_password = ''				# Password/Passphrase used to authenticate with SMTP server, if needed

# Here you need to specify e-mail addresses.  The email_from address doesn't actually need 
# to be a valid e-mail address, but it is much better if it is, because delivery failure notifications
# go to that address.  The email_to is a list of recipients who will get the alerts.
#
# The e-mail addresses need to be in the form of userid@domain.com, not just userid.
# If email_to list is empty, it disables e-mail alerts.
#
# e-mail addresses can be just the actual e-mail address, userid@domain.com, or can be a
# human readable name with attached e-mail address in the form 'Joe Smith <userid@domain.com>".
# If using the latter format, the e-mail address must be between '<' and '>'.  The first part of
# the string can be any text, and if used for the gp_email_from address, can help differentiate the e-mails
# from different servers (for example:  'my test GPDB system <userid@domain.com>").

#gp_email_from = ''						# Who do we say the e-mails are from?  and who is the return-path?
#gp_email_to = ''						# Semicolon separated list of recipients that will get e-mail alerts.
										# empty means disable e-mail alerts.

#------------------------------------------------------------------------------
# SNMP INFORM/TRAP ALERTS
#------------------------------------------------------------------------------

# Configure the gp_snmp_monitor_address to be the system your SNMP monitor runs on, or a proxy
# that will relay the message to the SNMP monitor.  You can specify transport, DNS name, and port:
# [<transport-specifier>:]<transport-address>[:port]
#
# where <transport-specifier> can be 'udp', 'tcp', 'udpv6', 'tcpv6', or 'unix' for unix domain sockets (optional).
# For udp or tcp, the port is typically 162. 
# For a SNMP monitor running locally, you might use 'localhost:162', but more typically
# the SNMP monitor is running on some other machine.
# You can send to multiple network monitors by using a comma separated list of addresses.
#
# if gp_snmp_peername is empty, snmp alerts are disabled.

#gp_snmp_monitor_address = ''     		# name or IP address(es) (and optionally the port) of the SNMP monitor(s) that will receive the alerts.
#gp_snmp_community = 'public'			# Change to whatever community string you use in your monitor
#gp_snmp_use_inform_or_trap = 'trap'    # Set to 'inform' or 'trap', we will send SNMP v2c inform, or SNMP v2c trap.

#------------------------------------------------------------------------------
# EMC Connect
#------------------------------------------------------------------------------

#gp_connectemc_mode = 'on'				# 'on' will send EMC Connect events and store locally, 
										# 'local' will store events locally, 
										# 'off' will not store or send events

#------------------------------------------------------------------------------
# RUNTIME STATISTICS
#------------------------------------------------------------------------------

# - ANALYZE Statistics on Database Contents -

#default_statistics_target = 25		# range 1 - 1000 (target # of
					# histogram bins)
#gp_analyze_relative_error = 0.25	# range 0.0 - 1.0 (target relative
					# error fraction)
					
# - Query/Index Statistics Collector -

#track_activities = on
#track_counts = off
#update_process_title = on

#stats_queue_level = off


# - Statistics Monitoring -

#log_parser_stats = off
#log_planner_stats = off
#log_executor_stats = off
#log_statement_stats = off


gp_autostats_mode=on_no_stats		# none, on_no_stats, on_change. see documentation for semantics.
gp_autostats_on_change_threshold=2147483647 # [0..INT_MAX]. see documentation for semantics.
log_autostats=off	# print additional autostats information

#------------------------------------------------------------------------------
# CLIENT CONNECTION DEFAULTS
#------------------------------------------------------------------------------

# - Statement Behavior -

#search_path = '"$user",public'		# schema names
#default_tablespace = ''		# a tablespace name, '' uses the default
#check_function_bodies = on
#default_transaction_isolation = 'read committed'
#default_transaction_read_only = off
#statement_timeout = 0			# in milliseconds, 0 is disabled
#idle_session_gang_timeout = 18s 	# in milliseconds, 0 is disabled
#vacuum_freeze_min_age = 100000000

# - 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 = '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

# - Other Defaults -

#dynamic_library_path = '$libdir'
#explain_pretty_print = on
#local_preload_libraries = ''


#------------------------------------------------------------------------------
# LOCK MANAGEMENT
#------------------------------------------------------------------------------

#deadlock_timeout = 1s
#max_locks_per_transaction = 128		# 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.


#---------------------------------------------------------------------------
# RESOURCE SCHEDULING
#---------------------------------------------------------------------------

#max_resource_queues = 9		# no. of resource queues to create.
#max_resource_portals_per_transaction = 64	# no. of portals per backend.
#resource_select_only = on		# resource lock SELECT queries only.
#resource_cleanup_gangs_on_wait = on	# Cleanup idle reader gangs before
										# resource lockwait.
gp_resqueue_memory_policy = 'eager_free'	# memory request based queueing. 
									# eager_free, auto or none
#---------------------------------------------------------------------------
# EXTERNAL TABLES
#---------------------------------------------------------------------------
#gp_external_enable_exec = on   # enable external tables with EXECUTE.
#gp_external_grant_privileges = off #enable create http/gpfdist for non su's

#---------------------------------------------------------------------------
# APPEND ONLY TABLES
#---------------------------------------------------------------------------
#gp_safefswritesize = 0   # minimum size for safe AO writes in a non-mature fs
max_appendonly_tables = 10000 # Maximum number of append only tables that can 
							  # participate in writing data concurrently.
#------------------------------------------------------------------------------
# VERSION/PLATFORM COMPATIBILITY
#------------------------------------------------------------------------------

# - Previous PostgreSQL Versions -

#add_missing_from = off
#array_nulls = on
#backslash_quote = safe_encoding	# on, off, or safe_encoding
#escape_string_warning = on
#regex_flavor = advanced		# advanced, extended, or basic
#standard_conforming_strings = on


# - Other Platforms and Clients -

#transform_null_equals = off


#---------------------------------------------------------------------------
# GREENPLUM ARRAY CONFIGURATION
#---------------------------------------------------------------------------

#---------------------------------------------------------------------------
# GREENPLUM ARRAY TUNING
#---------------------------------------------------------------------------

# - Interconnect -

#gp_max_packet_size = 8192
gp_interconnect_type=udpifc

# - Worker Process Creation -

gp_connections_per_thread = 64
gp_segment_connect_timeout = 600s
#gp_enable_delete_as_truncate = off

# - Resource limits -
gp_vmem_protect_limit = 8192  #Virtual memory limit (in MB).
#gp_vmem_idle_resource_timeout = 18000 # idle-time before gang-release, in milliseconds (zero disables release).

#------------------------------------------------------------------------------
# CUSTOMIZED OPTIONS
#------------------------------------------------------------------------------

#custom_variable_classes = ''			# list of custom variable class names
gp_backup_directIO = off				# enable\disable dump with direct IO
gp_backup_directIO_read_chunk_mb = 20	# Size of read Chunk buffer in directIO dump (in MB)