listen_addresses = '*'  # what IP interface(s) to listen on;
                                # defaults to localhost, '*' = any
#port =  5432 
max_connections =  100 
        # note: increasing max_connections costs about  500  bytes of shared
        # memory per connection slot, in addition to costs from shared_buffers
        # and max_locks_per_transaction.
#superuser_reserved_connections =  2 
#unix_socket_directory = ''
#unix_socket_group = ''
#unix_socket_permissions =  0777  # octal
#rendezvous_name = ''           # defaults to the computer name

# - Security & Authentication -

#authentication_timeout =  600    #  1 - 600 , in seconds
#ssl = true
password_encryption = true
#krb_server_keyfile = ''
#db_user_namespace = false

#---------------------------------------------------------------------------
# RESOURCE USAGE (except WAL)
#---------------------------------------------------------------------------

# - Memory -

shared_buffers =  32768           # min  16 , at least max_connections* 2 , 8KB each
#work_mem =  1248576              # min  64 , size in KB
maintenance_work_mem =  327680    # min  1024 , size in KB
max_stack_depth =  2048           # min  100 , size in KB
sort_mem =  32768 


# - Free Space Map -

#max_fsm_pages =  20000           # min max_fsm_relations* 16 ,  6  bytes each
#max_fsm_relations =  1000        # min  100 , ~ 50  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_percent =  1            #  0 - 100 % of dirty buffers in each round
#bgwriter_maxpages =  100         #  0 - 1000  buffers max per round

#---------------------------------------------------------------------------
# WRITE AHEAD LOG
#---------------------------------------------------------------------------

# - Settings -

fsync = false                   # turns forced synchronization on or off
wal_sync_method = fsync         # the default varies across platforms:
                                # fsync, fdatasync, fsync_writethrough,
                                # open_sync, open_datasync
wal_buffers =  32                 # min  4 , 8KB each
#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 =  300        # range  30 - 3600 , in seconds
#checkpoint_warning =  30         #  0  is off, in seconds

# - Archiving -

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


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

# - Planner Method Configuration -

enable_hashagg = true
enable_hashjoin = true
enable_indexscan = true
enable_mergejoin = true
enable_nestloop = true
enable_seqscan = true
enable_sort = true
enable_tidscan = true

# - Planner Cost Constants -

effective_cache_size =  1048576    # typically 8KB each
#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 = true
#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 
#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 relevant when logging to stderr:
#redirect_stderr = false    # Enable capturing of stderr into log files.
# These are only relevant if redirect_stderr is true:
log_directory = 'pg_log'   # Directory where log files are written.
                            # May be specified absolute or relative to PGDATA
log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' # Log file name pattern.
                            # May include strftime() escapes
#log_truncate_on_rotation = false  # If true, 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 false, 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 =  10240   # 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, in milliseconds.

#silent_mode = false             # DO NOT USE without syslog or redirect_stderr

# - What to Log -

#debug_print_parse = false
#debug_print_rewritten = false
#debug_print_plan = false
#debug_pretty_print = false
#log_connections = false
#log_disconnections = false
#log_duration = false
#log_line_prefix = ''           # e.g. '<%u%%%d> '
                                # %u=user name %d=database name
                                # %r=remote host and port
                                # %p=PID %t=timestamp %i=command tag
                                # %c=session id %l=session line number
                                # %s=session start timestamp %x=transaction id
                                # %q=stop here in non-session processes
                                # %%='%'
#log_statement = 'none'         # none, mod, ddl, all
#log_hostname = false


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

# - Statistics Monitoring -

#log_parser_stats    = true
#log_planner_stats   = true
#log_executor_stats  = true
#log_statement_stats = true

# - Query/Index Statistics Collector -

stats_start_collector = true
stats_command_string  = true
stats_block_level     = true
stats_row_level       = true
stats_reset_on_server_start = false


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

# - Statement Behavior -

#search_path = '$user,public'   # schema names
#default_tablespace = ''        # a tablespace name, or '' for default
#check_function_bodies = true
#default_transaction_isolation = 'read committed'
#default_transaction_read_only = false
#statement_timeout =  0           #  0  is disabled, in milliseconds

# - Locale and Formatting -

#datestyle = 'iso, mdy'
#timezone = unknown             # actually, defaults to TZ environment setting
#australian_timezones = false
#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 = true
#dynamic_library_path = '$libdir'


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

#deadlock_timeout =  1000         # in milliseconds
#max_locks_per_transaction =  64  # min  10 , ~ 200 *max_connections bytes each


#---------------------------------------------------------------------------
# VERSION/PLATFORM COMPATIBILITY
#---------------------------------------------------------------------------

# - Previous Postgres Versions -

#add_missing_from = true
#regex_flavor = advanced        # advanced, extended, or basic
#sql_inheritance = true
#default_with_oids = true

# - Other Platforms & Clients -

#transform_null_equals = false