| 1 | # ----------------------------- |
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| 2 | # PostgreSQL configuration file |
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| 3 | # ----------------------------- |
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| 4 | # |
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| 5 | # This file consists of lines of the form: |
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| 6 | # |
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| 7 | # name = value |
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| 8 | # |
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| 9 | # (The "=" is optional.) Whitespace may be used. Comments are introduced with |
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| 10 | # "#" anywhere on a line. The complete list of parameter names and allowed |
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| 11 | # values can be found in the PostgreSQL documentation. |
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| 12 | # |
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| 13 | # The commented-out settings shown in this file represent the default values. |
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| 14 | # Re-commenting a setting is NOT sufficient to revert it to the default value; |
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| 15 | # you need to reload the server. |
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| 16 | # |
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| 17 | # This file is read on server startup and when the server receives a SIGHUP |
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| 18 | # signal. If you edit the file on a running system, you have to SIGHUP the |
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| 19 | # server for the changes to take effect, or use "pg_ctl reload". Some |
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| 20 | # parameters, which are marked below, require a server shutdown and restart to |
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| 21 | # take effect. |
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| 22 | # |
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| 23 | # Any parameter can also be given as a command-line option to the server, e.g., |
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| 24 | # "postgres -c log_connections=on". Some paramters can be changed at run time |
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| 25 | # with the "SET" SQL command. |
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| 26 | # |
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| 27 | # Memory units: kB = kilobytes MB = megabytes GB = gigabytes |
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| 28 | # Time units: ms = milliseconds s = seconds min = minutes h = hours d = days |
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| 29 | |
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| 30 | |
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| 31 | #------------------------------------------------------------------------------ |
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| 32 | # FILE LOCATIONS |
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| 33 | #------------------------------------------------------------------------------ |
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| 34 | |
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| 35 | # The default values of these variables are driven from the -D command-line |
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| 36 | # option or PGDATA environment variable, represented here as ConfigDir. |
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| 37 | |
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| 38 | data_directory = '/var/lib/postgresql/8.3/main' # use data in another directory |
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| 39 | # (change requires restart) |
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| 40 | hba_file = '/etc/postgresql/8.3/main/pg_hba.conf' # host-based authentication file |
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| 41 | # (change requires restart) |
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| 42 | ident_file = '/etc/postgresql/8.3/main/pg_ident.conf' # ident configuration file |
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| 43 | # (change requires restart) |
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| 44 | |
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| 45 | # If external_pid_file is not explicitly set, no extra PID file is written. |
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| 46 | external_pid_file = '/var/run/postgresql/8.3-main.pid' # write an extra PID file |
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| 47 | # (change requires restart) |
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| 48 | |
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| 49 | |
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| 50 | #------------------------------------------------------------------------------ |
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| 51 | # CONNECTIONS AND AUTHENTICATION |
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| 52 | #------------------------------------------------------------------------------ |
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| 53 | |
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| 54 | # - Connection Settings - |
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| 55 | |
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| 56 | listen_addresses = '*' # what IP address(es) to listen on; |
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| 57 | # comma-separated list of addresses; |
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| 58 | # defaults to 'localhost', '*' = all |
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| 59 | # (change requires restart) |
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| 60 | port = 5432 # (change requires restart) |
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| 61 | max_connections = 100 # (change requires restart) |
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| 62 | # Note: Increasing max_connections costs ~400 bytes of shared memory per |
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| 63 | # connection slot, plus lock space (see max_locks_per_transaction). You might |
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| 64 | # also need to raise shared_buffers to support more connections. |
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| 65 | #superuser_reserved_connections = 3 # (change requires restart) |
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| 66 | unix_socket_directory = '/var/run/postgresql' # (change requires restart) |
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| 67 | #unix_socket_group = '' # (change requires restart) |
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| 68 | #unix_socket_permissions = 0777 # begin with 0 to use octal notation |
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| 69 | # (change requires restart) |
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| 70 | #bonjour_name = '' # defaults to the computer name |
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| 71 | # (change requires restart) |
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| 72 | |
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| 73 | # - Security and Authentication - |
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| 74 | |
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| 75 | #authentication_timeout = 1min # 1s-600s |
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| 76 | ssl = true # (change requires restart) |
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| 77 | #ssl_ciphers = 'ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH' # allowed SSL ciphers |
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| 78 | # (change requires restart) |
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| 79 | #password_encryption = on |
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| 80 | #db_user_namespace = off |
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| 81 | |
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| 82 | # Kerberos and GSSAPI |
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| 83 | #krb_server_keyfile = '' # (change requires restart) |
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| 84 | #krb_srvname = 'postgres' # (change requires restart, Kerberos only) |
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| 85 | #krb_server_hostname = '' # empty string matches any keytab entry |
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| 86 | # (change requires restart, Kerberos only) |
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| 87 | #krb_caseins_users = off # (change requires restart) |
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| 88 | #krb_realm = '' # (change requires restart) |
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| 89 | |
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| 90 | # - TCP Keepalives - |
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| 91 | # see "man 7 tcp" for details |
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| 92 | |
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| 93 | #tcp_keepalives_idle = 0 # TCP_KEEPIDLE, in seconds; |
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| 94 | # 0 selects the system default |
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| 95 | #tcp_keepalives_interval = 0 # TCP_KEEPINTVL, in seconds; |
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| 96 | # 0 selects the system default |
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| 97 | #tcp_keepalives_count = 0 # TCP_KEEPCNT; |
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| 98 | # 0 selects the system default |
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| 99 | |
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| 100 | |
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| 101 | #------------------------------------------------------------------------------ |
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| 102 | # RESOURCE USAGE (except WAL) |
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| 103 | #------------------------------------------------------------------------------ |
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| 104 | |
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| 105 | # - Memory - |
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| 106 | |
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| 107 | shared_buffers = 24MB # min 128kB or max_connections*16kB |
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| 108 | # (change requires restart) |
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| 109 | #temp_buffers = 8MB # min 800kB |
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| 110 | #max_prepared_transactions = 5 # can be 0 or more |
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| 111 | # (change requires restart) |
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| 112 | # Note: Increasing max_prepared_transactions costs ~600 bytes of shared memory |
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| 113 | # per transaction slot, plus lock space (see max_locks_per_transaction). |
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| 114 | #work_mem = 1MB # min 64kB |
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| 115 | #maintenance_work_mem = 16MB # min 1MB |
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| 116 | #max_stack_depth = 2MB # min 100kB |
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| 117 | |
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| 118 | # - Free Space Map - |
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| 119 | |
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| 120 | max_fsm_pages = 153600 # min max_fsm_relations*16, 6 bytes each |
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| 121 | # (change requires restart) |
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| 122 | #max_fsm_relations = 1000 # min 100, ~70 bytes each |
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| 123 | # (change requires restart) |
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| 124 | |
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| 125 | # - Kernel Resource Usage - |
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| 126 | |
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| 127 | #max_files_per_process = 1000 # min 25 |
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| 128 | # (change requires restart) |
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| 129 | #shared_preload_libraries = '' # (change requires restart) |
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| 130 | |
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| 131 | # - Cost-Based Vacuum Delay - |
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| 132 | |
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| 133 | #vacuum_cost_delay = 0 # 0-1000 milliseconds |
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| 134 | #vacuum_cost_page_hit = 1 # 0-10000 credits |
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| 135 | #vacuum_cost_page_miss = 10 # 0-10000 credits |
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| 136 | #vacuum_cost_page_dirty = 20 # 0-10000 credits |
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| 137 | #vacuum_cost_limit = 200 # 1-10000 credits |
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| 138 | |
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| 139 | # - Background Writer - |
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| 140 | |
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| 141 | #bgwriter_delay = 200ms # 10-10000ms between rounds |
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| 142 | #bgwriter_lru_maxpages = 100 # 0-1000 max buffers written/round |
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| 143 | #bgwriter_lru_multiplier = 2.0 # 0-10.0 multipler on buffers scanned/round |
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| 144 | |
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| 145 | |
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| 146 | #------------------------------------------------------------------------------ |
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| 147 | # WRITE AHEAD LOG |
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| 148 | #------------------------------------------------------------------------------ |
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| 149 | |
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| 150 | # - Settings - |
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| 151 | |
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| 152 | #fsync = on # turns forced synchronization on or off |
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| 153 | #synchronous_commit = on # immediate fsync at commit |
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| 154 | #wal_sync_method = fsync # the default is the first option |
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| 155 | # supported by the operating system: |
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| 156 | # open_datasync |
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| 157 | # fdatasync |
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| 158 | # fsync |
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| 159 | # fsync_writethrough |
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| 160 | # open_sync |
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| 161 | #full_page_writes = on # recover from partial page writes |
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| 162 | #wal_buffers = 64kB # min 32kB |
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| 163 | # (change requires restart) |
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| 164 | #wal_writer_delay = 200ms # 1-10000 milliseconds |
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| 165 | |
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| 166 | #commit_delay = 0 # range 0-100000, in microseconds |
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| 167 | #commit_siblings = 5 # range 1-1000 |
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| 168 | |
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| 169 | # - Checkpoints - |
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| 170 | |
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| 171 | #checkpoint_segments = 3 # in logfile segments, min 1, 16MB each |
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| 172 | #checkpoint_timeout = 5min # range 30s-1h |
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| 173 | #checkpoint_completion_target = 0.5 # checkpoint target duration, 0.0 - 1.0 |
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| 174 | #checkpoint_warning = 30s # 0 is off |
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| 175 | |
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| 176 | # - Archiving - |
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| 177 | |
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| 178 | #archive_mode = off # allows archiving to be done |
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| 179 | # (change requires restart) |
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| 180 | #archive_command = '' # command to use to archive a logfile segment |
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| 181 | #archive_timeout = 0 # force a logfile segment switch after this |
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| 182 | # time; 0 is off |
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| 183 | |
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| 184 | |
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| 185 | #------------------------------------------------------------------------------ |
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| 186 | # QUERY TUNING |
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| 187 | #------------------------------------------------------------------------------ |
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| 188 | |
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| 189 | # - Planner Method Configuration - |
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| 190 | |
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| 191 | #enable_bitmapscan = on |
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| 192 | #enable_hashagg = on |
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| 193 | #enable_hashjoin = on |
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| 194 | #enable_indexscan = on |
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| 195 | #enable_mergejoin = on |
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| 196 | #enable_nestloop = on |
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| 197 | #enable_seqscan = on |
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| 198 | #enable_sort = on |
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| 199 | #enable_tidscan = on |
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| 200 | |
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| 201 | # - Planner Cost Constants - |
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| 202 | |
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| 203 | #seq_page_cost = 1.0 # measured on an arbitrary scale |
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| 204 | #random_page_cost = 4.0 # same scale as above |
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| 205 | #cpu_tuple_cost = 0.01 # same scale as above |
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| 206 | #cpu_index_tuple_cost = 0.005 # same scale as above |
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| 207 | #cpu_operator_cost = 0.0025 # same scale as above |
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| 208 | #effective_cache_size = 128MB |
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| 209 | |
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| 210 | # - Genetic Query Optimizer - |
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| 211 | |
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| 212 | #geqo = on |
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| 213 | #geqo_threshold = 12 |
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| 214 | #geqo_effort = 5 # range 1-10 |
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| 215 | #geqo_pool_size = 0 # selects default based on effort |
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| 216 | #geqo_generations = 0 # selects default based on effort |
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| 217 | #geqo_selection_bias = 2.0 # range 1.5-2.0 |
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| 218 | |
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| 219 | # - Other Planner Options - |
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| 220 | |
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| 221 | #default_statistics_target = 10 # range 1-1000 |
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| 222 | #constraint_exclusion = off |
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| 223 | #from_collapse_limit = 8 |
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| 224 | #join_collapse_limit = 8 # 1 disables collapsing of explicit |
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| 225 | # JOIN clauses |
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| 226 | |
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| 227 | |
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| 228 | #------------------------------------------------------------------------------ |
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| 229 | # ERROR REPORTING AND LOGGING |
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| 230 | #------------------------------------------------------------------------------ |
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| 231 | |
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| 232 | # - Where to Log - |
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| 233 | |
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| 234 | #log_destination = 'stderr' # Valid values are combinations of |
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| 235 | # stderr, csvlog, syslog and eventlog, |
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| 236 | # depending on platform. csvlog |
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| 237 | # requires logging_collector to be on. |
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| 238 | |
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| 239 | # This is used when logging to stderr: |
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| 240 | #logging_collector = off # Enable capturing of stderr and csvlog |
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| 241 | # into log files. Required to be on for |
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| 242 | # csvlogs. |
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| 243 | # (change requires restart) |
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| 244 | |
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| 245 | # These are only used if logging_collector is on: |
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| 246 | #log_directory = 'pg_log' # directory where log files are written, |
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| 247 | # can be absolute or relative to PGDATA |
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| 248 | #log_filename = 'postgresql-%Y-%m-%d_%H%M%S.log' # log file name pattern, |
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| 249 | # can include strftime() escapes |
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| 250 | #log_truncate_on_rotation = off # If on, an existing log file of the |
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| 251 | # same name as the new log file will be |
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| 252 | # truncated rather than appended to. |
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| 253 | # But such truncation only occurs on |
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| 254 | # time-driven rotation, not on restarts |
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| 255 | # or size-driven rotation. Default is |
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| 256 | # off, meaning append to existing files |
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| 257 | # in all cases. |
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| 258 | #log_rotation_age = 1d # Automatic rotation of logfiles will |
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| 259 | # happen after that time. 0 to disable. |
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| 260 | #log_rotation_size = 10MB # Automatic rotation of logfiles will |
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| 261 | # happen after that much log output. |
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| 262 | # 0 to disable. |
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| 263 | |
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| 264 | # These are relevant when logging to syslog: |
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| 265 | #syslog_facility = 'LOCAL0' |
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| 266 | #syslog_ident = 'postgres' |
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| 267 | |
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| 268 | |
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| 269 | # - When to Log - |
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| 270 | |
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| 271 | #client_min_messages = notice # values in order of decreasing detail: |
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| 272 | # debug5 |
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| 273 | # debug4 |
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| 274 | # debug3 |
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| 275 | # debug2 |
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| 276 | # debug1 |
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| 277 | # log |
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| 278 | # notice |
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| 279 | # warning |
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| 280 | # error |
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| 281 | |
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| 282 | #log_min_messages = notice # values in order of decreasing detail: |
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| 283 | # debug5 |
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| 284 | # debug4 |
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| 285 | # debug3 |
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| 286 | # debug2 |
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| 287 | # debug1 |
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| 288 | # info |
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| 289 | # notice |
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| 290 | # warning |
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| 291 | # error |
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| 292 | # log |
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| 293 | # fatal |
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| 294 | # panic |
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| 295 | |
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| 296 | #log_error_verbosity = default # terse, default, or verbose messages |
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| 297 | |
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| 298 | #log_min_error_statement = error # values in order of decreasing detail: |
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| 299 | # debug5 |
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| 300 | # debug4 |
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| 301 | # debug3 |
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| 302 | # debug2 |
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| 303 | # debug1 |
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| 304 | # info |
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| 305 | # notice |
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| 306 | # warning |
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| 307 | # error |
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| 308 | # log |
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| 309 | # fatal |
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| 310 | # panic (effectively off) |
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| 311 | |
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| 312 | #log_min_duration_statement = -1 # -1 is disabled, 0 logs all statements |
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| 313 | # and their durations, > 0 logs only |
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| 314 | # statements running at least this time. |
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| 315 | |
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| 316 | #silent_mode = off # DO NOT USE without syslog or |
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| 317 | # logging_collector |
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| 318 | # (change requires restart) |
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| 319 | |
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| 320 | # - What to Log - |
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| 321 | |
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| 322 | #debug_print_parse = off |
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| 323 | #debug_print_rewritten = off |
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| 324 | #debug_print_plan = off |
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| 325 | #debug_pretty_print = off |
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| 326 | #log_checkpoints = off |
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| 327 | #log_connections = off |
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| 328 | #log_disconnections = off |
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| 329 | #log_duration = off |
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| 330 | #log_hostname = off |
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| 331 | log_line_prefix = '%t ' # special values: |
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| 332 | # %u = user name |
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| 333 | # %d = database name |
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| 334 | # %r = remote host and port |
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| 335 | # %h = remote host |
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| 336 | # %p = process ID |
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| 337 | # %t = timestamp without milliseconds |
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| 338 | # %m = timestamp with milliseconds |
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| 339 | # %i = command tag |
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| 340 | # %c = session ID |
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| 341 | # %l = session line number |
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| 342 | # %s = session start timestamp |
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| 343 | # %v = virtual transaction ID |
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| 344 | # %x = transaction ID (0 if none) |
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| 345 | # %q = stop here in non-session |
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| 346 | # processes |
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| 347 | # %% = '%' |
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| 348 | # e.g. '<%u%%%d> ' |
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| 349 | #log_lock_waits = off # log lock waits >= deadlock_timeout |
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| 350 | #log_statement = 'none' # none, ddl, mod, all |
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| 351 | #log_temp_files = -1 # log temporary files equal or larger |
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| 352 | # than specified size; |
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| 353 | # -1 disables, 0 logs all temp files |
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| 354 | #log_timezone = unknown # actually, defaults to TZ environment |
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| 355 | # setting |
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| 356 | |
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| 357 | |
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| 358 | #------------------------------------------------------------------------------ |
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| 359 | # RUNTIME STATISTICS |
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| 360 | #------------------------------------------------------------------------------ |
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| 361 | |
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| 362 | # - Query/Index Statistics Collector - |
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| 363 | |
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| 364 | #track_activities = on |
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| 365 | #track_counts = on |
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| 366 | #update_process_title = on |
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| 367 | |
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| 368 | |
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| 369 | # - Statistics Monitoring - |
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| 370 | |
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| 371 | #log_parser_stats = off |
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| 372 | #log_planner_stats = off |
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| 373 | #log_executor_stats = off |
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| 374 | #log_statement_stats = off |
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| 375 | |
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| 376 | |
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| 377 | #------------------------------------------------------------------------------ |
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| 378 | # AUTOVACUUM PARAMETERS |
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| 379 | #------------------------------------------------------------------------------ |
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| 380 | |
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| 381 | #autovacuum = on # Enable autovacuum subprocess? 'on' |
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| 382 | # requires track_counts to also be on. |
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| 383 | #log_autovacuum_min_duration = -1 # -1 disables, 0 logs all actions and |
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| 384 | # their durations, > 0 logs only |
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| 385 | # actions running at least that time. |
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| 386 | #autovacuum_max_workers = 3 # max number of autovacuum subprocesses |
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| 387 | #autovacuum_naptime = 1min # time between autovacuum runs |
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| 388 | #autovacuum_vacuum_threshold = 50 # min number of row updates before |
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| 389 | # vacuum |
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| 390 | #autovacuum_analyze_threshold = 50 # min number of row updates before |
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| 391 | # analyze |
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| 392 | #autovacuum_vacuum_scale_factor = 0.2 # fraction of table size before vacuum |
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| 393 | #autovacuum_analyze_scale_factor = 0.1 # fraction of table size before analyze |
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| 394 | #autovacuum_freeze_max_age = 200000000 # maximum XID age before forced vacuum |
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| 395 | # (change requires restart) |
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| 396 | #autovacuum_vacuum_cost_delay = 20 # default vacuum cost delay for |
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| 397 | # autovacuum, -1 means use |
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| 398 | # vacuum_cost_delay |
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| 399 | #autovacuum_vacuum_cost_limit = -1 # default vacuum cost limit for |
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| 400 | # autovacuum, -1 means use |
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| 401 | # vacuum_cost_limit |
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| 402 | |
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| 403 | |
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| 404 | #------------------------------------------------------------------------------ |
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| 405 | # CLIENT CONNECTION DEFAULTS |
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| 406 | #------------------------------------------------------------------------------ |
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| 407 | |
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| 408 | # - Statement Behavior - |
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| 409 | |
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| 410 | #search_path = '"$user",public' # schema names |
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| 411 | #default_tablespace = '' # a tablespace name, '' uses the default |
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| 412 | #temp_tablespaces = '' # a list of tablespace names, '' uses |
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| 413 | # only default tablespace |
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| 414 | #check_function_bodies = on |
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| 415 | #default_transaction_isolation = 'read committed' |
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| 416 | #default_transaction_read_only = off |
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| 417 | #session_replication_role = 'origin' |
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| 418 | #statement_timeout = 0 # 0 is disabled |
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| 419 | #vacuum_freeze_min_age = 100000000 |
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| 420 | #xmlbinary = 'base64' |
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| 421 | #xmloption = 'content' |
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| 422 | |
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| 423 | # - Locale and Formatting - |
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| 424 | |
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| 425 | datestyle = 'iso, mdy' |
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| 426 | #timezone = unknown # actually, defaults to TZ environment |
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| 427 | # setting |
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| 428 | #timezone_abbreviations = 'Default' # Select the set of available time zone |
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| 429 | # abbreviations. Currently, there are |
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| 430 | # Default |
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| 431 | # Australia |
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| 432 | # India |
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| 433 | # You can create your own file in |
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| 434 | # share/timezonesets/. |
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| 435 | #extra_float_digits = 0 # min -15, max 2 |
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| 436 | #client_encoding = sql_ascii # actually, defaults to database |
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| 437 | # encoding |
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| 438 | |
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| 439 | # These settings are initialized by initdb, but they can be changed. |
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| 440 | lc_messages = 'C' # locale for system error message |
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| 441 | # strings |
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| 442 | lc_monetary = 'C' # locale for monetary formatting |
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| 443 | lc_numeric = 'C' # locale for number formatting |
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| 444 | lc_time = 'C' # locale for time formatting |
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| 445 | |
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| 446 | # default configuration for text search |
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| 447 | default_text_search_config = 'pg_catalog.english' |
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| 448 | |
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| 449 | # - Other Defaults - |
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| 450 | |
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| 451 | #explain_pretty_print = on |
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| 452 | #dynamic_library_path = '$libdir' |
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| 453 | #local_preload_libraries = '' |
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| 454 | |
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| 455 | |
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| 456 | #------------------------------------------------------------------------------ |
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| 457 | # LOCK MANAGEMENT |
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| 458 | #------------------------------------------------------------------------------ |
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| 459 | |
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| 460 | #deadlock_timeout = 1s |
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| 461 | #max_locks_per_transaction = 64 # min 10 |
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| 462 | # (change requires restart) |
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| 463 | # Note: Each lock table slot uses ~270 bytes of shared memory, and there are |
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| 464 | # max_locks_per_transaction * (max_connections + max_prepared_transactions) |
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| 465 | # lock table slots. |
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| 466 | |
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| 467 | |
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| 468 | #------------------------------------------------------------------------------ |
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| 469 | # VERSION/PLATFORM COMPATIBILITY |
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| 470 | #------------------------------------------------------------------------------ |
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| 471 | |
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| 472 | # - Previous PostgreSQL Versions - |
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| 473 | |
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| 474 | #add_missing_from = off |
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| 475 | #array_nulls = on |
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| 476 | #backslash_quote = safe_encoding # on, off, or safe_encoding |
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| 477 | #default_with_oids = off |
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| 478 | #escape_string_warning = on |
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| 479 | #regex_flavor = advanced # advanced, extended, or basic |
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| 480 | #sql_inheritance = on |
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| 481 | #standard_conforming_strings = off |
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| 482 | #synchronize_seqscans = on |
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| 483 | |
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| 484 | # - Other Platforms and Clients - |
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| 485 | |
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| 486 | #transform_null_equals = off |
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| 487 | |
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| 488 | |
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| 489 | #------------------------------------------------------------------------------ |
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| 490 | # CUSTOMIZED OPTIONS |
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| 491 | #------------------------------------------------------------------------------ |
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| 492 | |
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| 493 | #custom_variable_classes = '' # list of custom variable class names |
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