Server memory and efficientcy

# - Connection Settings -

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

listen_addresses = '*' # comma-separated list of addresses;

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

#port = 5432

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 = 2

superuser_reserved_connections = 4

#unix_socket_directory = ''

#unix_socket_group = ''

#unix_socket_permissions = 0777 # octal

#bonjour_name = '' # defaults to the computer name

# - Security & Authentication -

#authentication_timeout = 60 # 1-600, in seconds

#ssl = off

#password_encryption = on

#db_user_namespace = off

# Kerberos

#krb_server_keyfile = ''

#krb_srvname = 'postgres'

#krb_server_hostname = '' # empty string matches any keytab entry

#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 = 2000 # min 16 or max_connections*2, 8KB each

#shared_buffers = 31744

#shared_buffers = 8192

shared_buffers = 16384

#temp_buffers = 1000 # min 100, 8KB each

#max_prepared_transactions = 5 # can be 0 or more

# note: increasing max_prepared_transactions costs ~600 bytes of shared
memory

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

#work_mem = 1024 # min 64, size in KB

work_mem = 4096

#maintenance_work_mem = 16384 # min 1024, size in KB

maintenance_work_mem = 131078

#max_stack_depth = 2048 # min 100, size in KB

# - Free Space Map -

#max_fsm_pages = 20000 # min max_fsm_relations*16, 6 bytes each

#max_fsm_relations = 1000 # min 100, ~70 bytes each

# - Kernel Resource Usage -

#max_files_per_process = 1000 # min 25

#preload_libraries = ''

# - Cost-Based Vacuum Delay -

#vacuum_cost_delay = 0 # 0-1000 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 # 0-10000 credits

# - Background writer -

#bgwriter_delay = 200 # 10-10000 milliseconds between rounds

#bgwriter_lru_percent = 1.0 # 0-100% of LRU buffers scanned/round

#bgwriter_lru_maxpages = 5 # 0-1000 buffers max written/round

#bgwriter_all_percent = 0.333 # 0-100% of all buffers scanned/round

#bgwriter_all_maxpages = 5 # 0-1000 buffers max written/round

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

# WRITE AHEAD LOG

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

# - Settings -

#fsync = on # turns forced synchronization on or off

#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 = 8 # min 4, 8KB each

wal_buffers = 32

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

commit_delay = 20

#commit_siblings = 5 # range 1-1000

# - Checkpoints -

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

checkpoint_segments = 8

#checkpoint_timeout = 300 # range 30-3600, in seconds

#checkpoint_warning = 30 # in seconds, 0 is off

# - Archiving -

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

# segment

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

# 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 -

#effective_cache_size = 1000 # typically 8KB each

effective_cache_size = 307800

#effective_cache_size = 160000

#random_page_cost = 4 # units are one sequential page fetch

# cost

#cpu_tuple_cost = 0.01 # (same)

#cpu_index_tuple_cost = 0.001 # (same)

#cpu_operator_cost = 0.0025 # (same)

# - 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 = 10 # range 1-1000

#constraint_exclusion = off

#from_collapse_limit = 8

#join_collapse_limit = 8 # 1 disables collapsing of explicit

# JOINs

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

# ERROR REPORTING AND LOGGING

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

# - Where to Log -

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

# stderr, syslog and eventlog,

# depending on platform.

# This is used when logging to stderr:

redirect_stderr = on # Enable capturing of stderr into log

# files

# These are only used if redirect_stderr is on:

log_directory = 'pg_log' # Directory where log files are written

# Can be absolute or relative to PGDATA

log_filename = 'postgresql-%a.log' # Log file name pattern.

# Can include strftime() escapes

log_truncate_on_rotation = on # If on, any 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 = 1440 # Automatic rotation of logfiles will

# happen after so many minutes. 0 to

# disable.

log_rotation_size = 0 # Automatic rotation of logfiles will

# happen after so many kilobytes of log

# output. 0 to disable.

# These are relevant when logging to syslog:

#syslog_facility = 'LOCAL0'

#syslog_ident = 'postgres'

# - 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 = notice # 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 = panic # Values in order of increasing severity:

# debug5

# debug4

# debug3

# debug2

# debug1

# info

# notice

# warning

# error

# panic(off)

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

# and their durations, in milliseconds.

#silent_mode = off # DO NOT USE without syslog or

# redirect_stderr

# - What to Log -

#debug_print_parse = off

#debug_print_rewritten = off

#debug_print_plan = off

#debug_pretty_print = off

#log_connections = off

#log_disconnections = off

#log_duration = off

#log_line_prefix = '' # Special values:

# %u = user name

# %d = database name

# %r = remote host and port

# %h = remote host

# %p = PID

# %t = timestamp (no milliseconds)

# %m = timestamp with milliseconds

# %i = command tag

# %c = session id

# %l = session line number

# %s = session start timestamp

# %x = transaction id

# %q = stop here in non-session

# processes

# %% = '%'

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

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

#log_hostname = off

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

# RUNTIME STATISTICS

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

# - Statistics Monitoring -

#log_parser_stats = off

#log_planner_stats = off

#log_executor_stats = off

#log_statement_stats = off

# - Query/Index Statistics Collector -

#stats_start_collector = on

#stats_command_string = off

#stats_block_level = off

#stats_row_level = off

stats_row_level = on

#stats_reset_on_server_start = off

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

# AUTOVACUUM PARAMETERS

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

#autovacuum = off # enable autovacuum subprocess?

autovacuum = on

#autovacuum_naptime = 60 # time between autovacuum runs, in secs

#autovacuum_vacuum_threshold = 1000 # min # of tuple updates before

# vacuum

#autovacuum_analyze_threshold = 500 # min # of tuple updates before

# analyze

#autovacuum_vacuum_scale_factor = 0.4 # fraction of rel size before

# vacuum

#autovacuum_analyze_scale_factor = 0.2 # fraction of rel size before

# analyze

#autovacuum_vacuum_cost_delay = -1 # default vacuum cost delay for

# autovac, -1 means use

# vacuum_cost_delay

#autovacuum_vacuum_cost_limit = -1 # default vacuum cost limit for

# autovac, -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

#check_function_bodies = on

#default_transaction_isolation = 'read committed'

#default_transaction_read_only = off

#statement_timeout = 0 # 0 is disabled, in milliseconds

# - Locale and Formatting -

#datestyle = 'iso, mdy'

#timezone = unknown # actually, defaults to TZ

# environment setting

#australian_timezones = off

#extra_float_digits = 0 # min -15, max 2

#client_encoding = sql_ascii # actually, defaults to database

# encoding

# These settings are initialized by initdb -- they might 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 -

#explain_pretty_print = on

#dynamic_library_path = '$libdir'

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

# LOCK MANAGEMENT

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

#deadlock_timeout = 1000 # in milliseconds

#max_locks_per_transaction = 64 # min 10

# note: each lock table slot uses ~220 bytes of shared memory, and there are

# max_locks_per_transaction * (max_connections + max_prepared_transactions)

# lock table slots.

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

# VERSION/PLATFORM COMPATIBILITY

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

# - Previous Postgres Versions -

#add_missing_from = off

#backslash_quote = safe_encoding # on, off, or safe_encoding

#default_with_oids = off

#escape_string_warning = off

#regex_flavor = advanced # advanced, extended, or basic

#sql_inheritance = on

# - Other Platforms & Clients -

#transform_null_equals = off

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

# CUSTOMIZED OPTIONS

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

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