git.rot13.org Git - pgpool-online-recovery/blob - pgpool.conf

   1 # ----------------------------
   2 # pgPool-II configuration file
   3 # ----------------------------
   4 #
   5 # This file consists of lines of the form:
   6 #
   7 #   name = value
   8 #
   9 # Whitespace may be used.  Comments are introduced with "#" anywhere on a line.
  10 # The complete list of parameter names and allowed values can be found in the
  11 # pgPool-II documentation.
  12 #
  13 # This file is read on server startup and when the server receives a SIGHUP
  14 # signal.  If you edit the file on a running system, you have to SIGHUP the
  15 # server for the changes to take effect, or use "pgpool reload".  Some
  16 # parameters, which are marked below, require a server shutdown and restart to
  17 # take effect.
  18 #
  19
  20
  21 #------------------------------------------------------------------------------
  22 # CONNECTIONS
  23 #------------------------------------------------------------------------------
  24
  25 # - pgpool Connection Settings -
  26
  27 listen_addresses = '*'
  28                                    # Host name or IP address to listen on:
  29                                    # '*' for all, '' for no TCP/IP connections
  30                                    # (change requires restart)
  31 port = 9999
  32                                    # Port number
  33                                    # (change requires restart)
  34 socket_dir = '/tmp'
  35                                    # Unix domain socket path
  36                                    # The Debian package defaults to
  37                                    # /var/run/postgresql
  38                                    # (change requires restart)
  39 listen_backlog_multiplier = 2
  40                                    # Set the backlog parameter of listen(2) to
  41                                                                    # num_init_children * listen_backlog_multiplier.
  42                                    # (change requires restart)
  43 serialize_accept = off
  44                                    # whether to serialize accept() call to avoid thundering herd problem
  45                                    # (change requires restart)
  46
  47 # - pgpool Communication Manager Connection Settings -
  48
  49 pcp_listen_addresses = '*'
  50                                    # Host name or IP address for pcp process to listen on:
  51                                    # '*' for all, '' for no TCP/IP connections
  52                                    # (change requires restart)
  53 pcp_port = 9898
  54                                    # Port number for pcp
  55                                    # (change requires restart)
  56 pcp_socket_dir = '/tmp/'
  57                                    # Unix domain socket path for pcp
  58                                    # The Debian package defaults to
  59                                    # /var/run/postgresql
  60                                    # (change requires restart)
  61
  62 # - Backend Connection Settings -
  63
  64 backend_hostname0 = 'edozvola-db-01'
  65                                    # Host name or IP address to connect to for backend 0
  66 backend_port0 = 5432
  67                                    # Port number for backend 0
  68 backend_weight0 = 1
  69                                    # Weight for backend 0 (only in load balancing mode)
  70 backend_data_directory0 = '/var/lib/pgsql/9.6/data/'
  71                                    # Data directory for backend 0
  72 backend_flag0 = 'ALLOW_TO_FAILOVER'
  73                                    # Controls various backend behavior
  74                                    # ALLOW_TO_FAILOVER or DISALLOW_TO_FAILOVER
  75
  76 backend_hostname1 = 'edozvola-db-02'
  77 backend_port1 = 5432
  78 backend_weight1 = 1
  79 backend_data_directory1 = '/var/lib/pgsql/9.6/data/'
  80 backend_flag1 = 'ALLOW_TO_FAILOVER'
  81
  82 # - Authentication -
  83
  84 enable_pool_hba = off
  85                                    # Use pool_hba.conf for client authentication
  86 pool_passwd = 'pool_passwd'
  87                                    # File name of pool_passwd for md5 authentication.
  88                                    # "" disables pool_passwd.
  89                                    # (change requires restart)
  90 authentication_timeout = 60
  91                                    # Delay in seconds to complete client authentication
  92                                    # 0 means no timeout.
  93
  94 # - SSL Connections -
  95
  96 ssl = off
  97                                    # Enable SSL support
  98                                    # (change requires restart)
  99 #ssl_key = './server.key'
 100                                    # Path to the SSL private key file
 101                                    # (change requires restart)
 102 #ssl_cert = './server.cert'
 103                                    # Path to the SSL public certificate file
 104                                    # (change requires restart)
 105 #ssl_ca_cert = ''
 106                                    # Path to a single PEM format file
 107                                    # containing CA root certificate(s)
 108                                    # (change requires restart)
 109 #ssl_ca_cert_dir = ''
 110                                    # Directory containing CA root certificate(s)
 111                                    # (change requires restart)
 112
 113
 114 #------------------------------------------------------------------------------
 115 # POOLS
 116 #------------------------------------------------------------------------------
 117
 118 # - Concurrent session and pool size -
 119
 120 num_init_children = 32
 121                                    # Number of concurrent sessions allowed
 122                                    # (change requires restart)
 123 max_pool = 4
 124                                    # Number of connection pool caches per connection
 125                                    # (change requires restart)
 126
 127 # - Life time -
 128
 129 child_life_time = 300
 130                                    # Pool exits after being idle for this many seconds
 131 child_max_connections = 0
 132                                    # Pool exits after receiving that many connections
 133                                    # 0 means no exit
 134 connection_life_time = 0
 135                                    # Connection to backend closes after being idle for this many seconds
 136                                    # 0 means no close
 137 client_idle_limit = 0
 138                                    # Client is disconnected after being idle for that many seconds
 139                                    # (even inside an explicit transactions!)
 140                                    # 0 means no disconnection
 141
 142
 143 #------------------------------------------------------------------------------
 144 # LOGS
 145 #------------------------------------------------------------------------------
 146
 147 # - Where to log -
 148
 149 log_destination = 'syslog'
 150                                    # Where to log
 151                                    # Valid values are combinations of stderr,
 152                                    # and syslog. Default to stderr.
 153
 154 # - What to log -
 155
 156 log_line_prefix = '%t: pid %p: '   # printf-style string to output at beginning of each log line.
 157
 158 log_connections = off
 159                                    # Log connections
 160 log_hostname = off
 161                                    # Hostname will be shown in ps status
 162                                    # and in logs if connections are logged
 163 log_statement = off
 164                                    # Log all statements
 165 log_per_node_statement = off
 166                                    # Log all statements
 167                                    # with node and backend informations
 168 log_standby_delay = 'none'
 169                                    # Log standby delay
 170                                    # Valid values are combinations of always,
 171                                    # if_over_threshold, none
 172
 173 # - Syslog specific -
 174
 175 syslog_facility = 'LOCAL0'
 176                                    # Syslog local facility. Default to LOCAL0
 177 syslog_ident = 'pgpool'
 178                                    # Syslog program identification string
 179                                    # Default to 'pgpool'
 180
 181 # - Debug -
 182
 183 #log_error_verbosity = default          # terse, default, or verbose messages
 184 log_error_verbosity = verbose
 185
 186 #client_min_messages = notice           # values in order of decreasing detail:
 187                                         #   debug5
 188                                         #   debug4
 189                                         #   debug3
 190                                         #   debug2
 191                                         #   debug1
 192                                         #   log
 193                                         #   notice
 194                                         #   warning
 195                                         #   error
 196
 197 #log_min_messages = warning             # values in order of decreasing detail:
 198                                         #   debug5
 199                                         #   debug4
 200                                         #   debug3
 201                                         #   debug2
 202                                         #   debug1
 203                                         #   info
 204                                         #   notice
 205                                         #   warning
 206                                         #   error
 207                                         #   log
 208                                         #   fatal
 209                                         #   panic
 210
 211 #------------------------------------------------------------------------------
 212 # FILE LOCATIONS
 213 #------------------------------------------------------------------------------
 214
 215 pid_file_name = '/tmp/pgpool.pid'
 216                                    # PID file name
 217                                    # Can be specified as relative to the"
 218                                    # location of pgpool.conf file or
 219                                    # as an absolute path
 220                                    # (change requires restart)
 221 logdir = '/var/log/pgpool'
 222                                    # Directory of pgPool status file
 223                                    # (change requires restart)
 224
 225
 226 #------------------------------------------------------------------------------
 227 # CONNECTION POOLING
 228 #------------------------------------------------------------------------------
 229
 230 connection_cache = on
 231                                    # Activate connection pools
 232                                    # (change requires restart)
 233
 234                                    # Semicolon separated list of queries
 235                                    # to be issued at the end of a session
 236                                    # The default is for 8.3 and later
 237 reset_query_list = 'ABORT; DISCARD ALL'
 238                                    # The following one is for 8.2 and before
 239 #reset_query_list = 'ABORT; RESET ALL; SET SESSION AUTHORIZATION DEFAULT'
 240
 241
 242 #------------------------------------------------------------------------------
 243 # REPLICATION MODE
 244 #------------------------------------------------------------------------------
 245
 246 replication_mode = off
 247                                    # Activate replication mode
 248                                    # (change requires restart)
 249 replicate_select = off
 250                                    # Replicate SELECT statements
 251                                    # when in replication mode
 252                                    # replicate_select is higher priority than
 253                                    # load_balance_mode.
 254
 255 insert_lock = on
 256                                    # Automatically locks a dummy row or a table
 257                                    # with INSERT statements to keep SERIAL data
 258                                    # consistency
 259                                    # Without SERIAL, no lock will be issued
 260 lobj_lock_table = ''
 261                                    # When rewriting lo_creat command in
 262                                    # replication mode, specify table name to
 263                                    # lock
 264
 265 # - Degenerate handling -
 266
 267 replication_stop_on_mismatch = off
 268                                    # On disagreement with the packet kind
 269                                    # sent from backend, degenerate the node
 270                                    # which is most likely "minority"
 271                                    # If off, just force to exit this session
 272
 273 failover_if_affected_tuples_mismatch = off
 274                                    # On disagreement with the number of affected
 275                                    # tuples in UPDATE/DELETE queries, then
 276                                    # degenerate the node which is most likely
 277                                    # "minority".
 278                                    # If off, just abort the transaction to
 279                                    # keep the consistency
 280
 281
 282 #------------------------------------------------------------------------------
 283 # LOAD BALANCING MODE
 284 #------------------------------------------------------------------------------
 285
 286 load_balance_mode = on
 287                                    # Activate load balancing mode
 288                                    # (change requires restart)
 289 ignore_leading_white_space = on
 290                                    # Ignore leading white spaces of each query
 291 white_function_list = ''
 292                                    # Comma separated list of function names
 293                                    # that don't write to database
 294                                    # Regexp are accepted
 295 black_function_list = 'nextval,setval,nextval,setval'
 296                                    # Comma separated list of function names
 297                                    # that write to database
 298                                    # Regexp are accepted
 299
 300 database_redirect_preference_list = ''
 301                                                                    # comma separated list of pairs of database and node id.
 302                                                                    # example: postgres:primary,mydb[0-4]:1,mydb[5-9]:2'
 303                                                                    # valid for streaming replicaton mode only.
 304
 305 app_name_redirect_preference_list = ''
 306                                                                    # comma separated list of pairs of app name and node id.
 307                                                                    # example: 'psql:primary,myapp[0-4]:1,myapp[5-9]:standby'
 308                                                                    # valid for streaming replicaton mode only.
 309 allow_sql_comments = off
 310                                                                    # if on, ignore SQL comments when judging if load balance or
 311                                                                    # query cache is possible.
 312                                                                    # If off, SQL comments effectively prevent the judgment
 313                                                                    # (pre 3.4 behavior).
 314
 315 #------------------------------------------------------------------------------
 316 # MASTER/SLAVE MODE
 317 #------------------------------------------------------------------------------
 318
 319 master_slave_mode = on
 320                                    # Activate master/slave mode
 321                                    # (change requires restart)
 322 master_slave_sub_mode = 'stream'
 323                                    # Master/slave sub mode
 324                                    # Valid values are combinations slony or
 325                                    # stream. Default is slony.
 326                                    # (change requires restart)
 327
 328 # - Streaming -
 329
 330 sr_check_period = 5
 331                                    # Streaming replication check period
 332                                    # Disabled (0) by default
 333 sr_check_user = 'postgres'
 334                                    # Streaming replication check user
 335                                    # This is necessary even if you disable
 336                                    # streaming replication delay check with
 337                                    # sr_check_period = 0
 338 sr_check_password = ''
 339                                    # Password for streaming replication check user
 340 sr_check_database = 'postgres'
 341                                    # Database name for streaming replication check
 342 delay_threshold = 10000000
 343                                    # Threshold before not dispatching query to standby node
 344                                    # Unit is in bytes
 345                                    # Disabled (0) by default
 346
 347 # - Special commands -
 348
 349 follow_master_command = 'echo %M > /tmp/postgres_master'
 350                                    # Executes this command after master failover
 351                                    # Special values:
 352                                    #   %d = node id
 353                                    #   %h = host name
 354                                    #   %p = port number
 355                                    #   %D = database cluster path
 356                                    #   %m = new master node id
 357                                    #   %H = hostname of the new master node
 358                                    #   %M = old master node id
 359                                    #   %P = old primary node id
 360                                    #   %r = new master port number
 361                                    #   %R = new master database cluster path
 362                                    #   %% = '%' character
 363
 364 #------------------------------------------------------------------------------
 365 # HEALTH CHECK
 366 #------------------------------------------------------------------------------
 367
 368 health_check_period = 3
 369                                    # Health check period
 370                                    # Disabled (0) by default
 371 health_check_timeout = 2
 372                                    # Health check timeout
 373                                    # 0 means no timeout
 374 health_check_user = 'postgres'
 375                                    # Health check user
 376 health_check_password = ''
 377                                    # Password for health check user
 378 health_check_database = ''
 379                                    # Database name for health check. If '', tries 'postgres' frist, then 'template1'
 380
 381 health_check_max_retries = 2
 382                                    # Maximum number of times to retry a failed health check before giving up.
 383 health_check_retry_delay = 1
 384                                    # Amount of time to wait (in seconds) between retries.
 385 connect_timeout = 1000
 386                                    # Timeout value in milliseconds before giving up to connect to backend.
 387                                                                    # Default is 10000 ms (10 second). Flaky network user may want to increase
 388                                                                    # the value. 0 means no timeout.
 389                                                                    # Note that this value is not only used for health check,
 390                                                                    # but also for ordinary conection to backend.
 391
 392 #------------------------------------------------------------------------------
 393 # FAILOVER AND FAILBACK
 394 #------------------------------------------------------------------------------
 395
 396 failover_command = '/etc/pgpool-II/failover.sh %d %H %P /tmp/trigger_file'
 397                                    # Executes this command at failover
 398                                    # Special values:
 399                                    #   %d = node id
 400                                    #   %h = host name
 401                                    #   %p = port number
 402                                    #   %D = database cluster path
 403                                    #   %m = new master node id
 404                                    #   %H = hostname of the new master node
 405                                    #   %M = old master node id
 406                                    #   %P = old primary node id
 407                                    #   %r = new master port number
 408                                    #   %R = new master database cluster path
 409                                    #   %% = '%' character
 410 #failback_command = ''
 411                                    # Executes this command at failback.
 412                                    # Special values:
 413                                    #   %d = node id
 414                                    #   %h = host name
 415                                    #   %p = port number
 416                                    #   %D = database cluster path
 417                                    #   %m = new master node id
 418                                    #   %H = hostname of the new master node
 419                                    #   %M = old master node id
 420                                    #   %P = old primary node id
 421                                    #   %r = new master port number
 422                                    #   %R = new master database cluster path
 423                                    #   %% = '%' character
 424
 425 fail_over_on_backend_error = on
 426                                    # Initiates failover when reading/writing to the
 427                                    # backend communication socket fails
 428                                    # If set to off, pgpool will report an
 429                                    # error and disconnect the session.
 430
 431 search_primary_node_timeout = 3
 432                                    # Timeout in seconds to search for the
 433                                    # primary node when a failover occurs.
 434                                    # 0 means no timeout, keep searching
 435                                    # for a primary node forever.
 436
 437 #------------------------------------------------------------------------------
 438 # ONLINE RECOVERY
 439 #------------------------------------------------------------------------------
 440
 441 recovery_user = 'nobody'
 442                                    # Online recovery user
 443 recovery_password = ''
 444                                    # Online recovery password
 445 recovery_1st_stage_command = ''
 446                                    # Executes a command in first stage
 447 recovery_2nd_stage_command = ''
 448                                    # Executes a command in second stage
 449 recovery_timeout = 90
 450                                    # Timeout in seconds to wait for the
 451                                    # recovering node's postmaster to start up
 452                                    # 0 means no wait
 453 client_idle_limit_in_recovery = 0
 454                                    # Client is disconnected after being idle
 455                                    # for that many seconds in the second stage
 456                                    # of online recovery
 457                                    # 0 means no disconnection
 458                                    # -1 means immediate disconnection
 459
 460
 461 #------------------------------------------------------------------------------
 462 # WATCHDOG
 463 #------------------------------------------------------------------------------
 464
 465 # - Enabling -
 466
 467 use_watchdog = on
 468                                     # Activates watchdog
 469                                     # (change requires restart)
 470
 471 # -Connection to up stream servers -
 472
 473 trusted_servers = 'edozvola-db-01,edozvola-db-02'
 474                                     # trusted server list which are used
 475                                     # to confirm network connection
 476                                     # (hostA,hostB,hostC,...)
 477                                     # (change requires restart)
 478 ping_path = '/bin'
 479                                     # ping command path
 480                                     # (change requires restart)
 481
 482 # - Watchdog communication Settings -
 483
 484 wd_hostname = '__HOSTNAME__THIS__'
 485                                     # Host name or IP address of this watchdog
 486                                     # (change requires restart)
 487 wd_port = 9000
 488                                     # port number for watchdog service
 489                                     # (change requires restart)
 490 wd_priority = 1
 491                                                                         # priority of this watchdog in leader election
 492                                                                         # (change requires restart)
 493
 494 wd_authkey = ''
 495                                     # Authentication key for watchdog communication
 496                                     # (change requires restart)
 497
 498 wd_ipc_socket_dir = '/var/run/postgresql'
 499                                                                         # Unix domain socket path for watchdog IPC socket
 500                                                                         # The Debian package defaults to
 501                                                                         # /var/run/postgresql
 502                                                                         # (change requires restart)
 503
 504
 505 # - Virtual IP control Setting -
 506
 507 delegate_IP = '10.210.1.60'
 508                                     # delegate IP address
 509                                     # If this is empty, virtual IP never bring up.
 510                                     # (change requires restart)
 511 if_cmd_path = '/etc/pgpool-II/sbin'
 512                                     # path to the directory where if_up/down_cmd exists
 513                                     # (change requires restart)
 514 if_up_cmd = 'ifconfig eth0:0 $_IP_$ netmask 255.255.255.0 up'
 515                                     # startup delegate IP command
 516                                     # (change requires restart)
 517 if_down_cmd = 'ifconfig eth0:0 down'
 518                                     # shutdown delegate IP command
 519                                     # (change requires restart)
 520 arping_path = '/etc/pgpool-II/sbin'
 521                                     # arping command path
 522                                     # (change requires restart)
 523 arping_cmd = 'arping -U $_IP_$ -w 1'
 524                                     # arping command
 525                                     # (change requires restart)
 526
 527 # - Behaivor on escalation Setting -
 528
 529 clear_memqcache_on_escalation = on
 530                                     # Clear all the query cache on shared memory
 531                                     # when standby pgpool escalate to active pgpool
 532                                     # (= virtual IP holder).
 533                                     # This should be off if client connects to pgpool
 534                                     # not using virtual IP.
 535                                     # (change requires restart)
 536 wd_escalation_command = ''
 537                                     # Executes this command at escalation on new active pgpool.
 538                                     # (change requires restart)
 539 wd_de_escalation_command = ''
 540                                                                         # Executes this command when master pgpool resigns from being master.
 541                                                                         # (change requires restart)
 542
 543 # - Lifecheck Setting -
 544
 545 # -- common --
 546
 547 wd_monitoring_interfaces_list = ''  # Comma separated list of interfaces names to monitor.
 548                                                                         # if any interface from the list is active the watchdog will
 549                                                                         # consider the network is fine
 550                                                                         # 'any' to enable monitoring on all interfaces except loopback
 551                                                                         # '' to disable monitoring
 552
 553
 554 wd_lifecheck_method = 'heartbeat'
 555                                     # Method of watchdog lifecheck ('heartbeat' or 'query' or 'external')
 556                                     # (change requires restart)
 557 wd_interval = 3
 558                                     # lifecheck interval (sec) > 0
 559                                     # (change requires restart)
 560
 561 # -- heartbeat mode --
 562
 563 wd_heartbeat_port = 9694
 564                                     # Port number for receiving heartbeat signal
 565                                     # (change requires restart)
 566 wd_heartbeat_keepalive = 2
 567                                     # Interval time of sending heartbeat signal (sec)
 568                                     # (change requires restart)
 569 wd_heartbeat_deadtime = 30
 570                                     # Deadtime interval for heartbeat signal (sec)
 571                                     # (change requires restart)
 572 heartbeat_destination0 = 'edozvola-db-01'
 573                                     # Host name or IP address of destination 0
 574                                     # for sending heartbeat signal.
 575                                     # (change requires restart)
 576 heartbeat_destination_port0 = 9694
 577                                     # Port number of destination 0 for sending
 578                                     # heartbeat signal. Usually this is the
 579                                     # same as wd_heartbeat_port.
 580                                     # (change requires restart)
 581 heartbeat_device0 = ''
 582                                     # Name of NIC device (such like 'eth0')
 583                                     # used for sending/receiving heartbeat
 584                                     # signal to/from destination 0.
 585                                     # This works only when this is not empty
 586                                     # and pgpool has root privilege.
 587                                     # (change requires restart)
 588
 589 heartbeat_destination1 = 'edozvola-db-02'
 590 heartbeat_destination_port1 = 9694
 591 heartbeat_device1 = ''
 592
 593 # -- query mode --
 594
 595 wd_life_point = 3
 596                                     # lifecheck retry times
 597                                     # (change requires restart)
 598 wd_lifecheck_query = 'SELECT 1'
 599                                     # lifecheck query to pgpool from watchdog
 600                                     # (change requires restart)
 601 wd_lifecheck_dbname = 'template1'
 602                                     # Database name connected for lifecheck
 603                                     # (change requires restart)
 604 wd_lifecheck_user = 'nobody'
 605                                     # watchdog user monitoring pgpools in lifecheck
 606                                     # (change requires restart)
 607 wd_lifecheck_password = ''
 608                                     # Password for watchdog user in lifecheck
 609                                     # (change requires restart)
 610
 611 # - Other pgpool Connection Settings -
 612
 613 #other_pgpool_hostname0 = 'host0'
 614                                     # Host name or IP address to connect to for other pgpool 0
 615                                     # (change requires restart)
 616 #other_pgpool_port0 = 5432
 617                                     # Port number for othet pgpool 0
 618                                     # (change requires restart)
 619 #other_wd_port0 = 9000
 620                                     # Port number for othet watchdog 0
 621                                     # (change requires restart)
 622 other_pgpool_hostname0 = '__HOSTNAME__OTHER__'
 623 other_pgpool_port0 = 5432
 624 other_wd_port0 = 9000
 625
 626
 627 #------------------------------------------------------------------------------
 628 # OTHERS
 629 #------------------------------------------------------------------------------
 630 relcache_expire = 0
 631                                    # Life time of relation cache in seconds.
 632                                    # 0 means no cache expiration(the default).
 633                                    # The relation cache is used for cache the
 634                                    # query result against PostgreSQL system
 635                                    # catalog to obtain various information
 636                                    # including table structures or if it's a
 637                                    # temporary table or not. The cache is
 638                                    # maintained in a pgpool child local memory
 639                                    # and being kept as long as it survives.
 640                                    # If someone modify the table by using
 641                                    # ALTER TABLE or some such, the relcache is
 642                                    # not consistent anymore.
 643                                    # For this purpose, cache_expiration
 644                                    # controls the life time of the cache.
 645
 646 relcache_size = 256
 647                                    # Number of relation cache
 648                                    # entry. If you see frequently:
 649                                    # "pool_search_relcache: cache replacement happend"
 650                                    # in the pgpool log, you might want to increate this number.
 651
 652 check_temp_table = on
 653                                    # If on, enable temporary table check in SELECT statements.
 654                                    # This initiates queries against system catalog of primary/master
 655                                    # thus increases load of master.
 656                                    # If you are absolutely sure that your system never uses temporary tables
 657                                    # and you want to save access to primary/master, you could turn this off.
 658                                    # Default is on.
 659
 660 check_unlogged_table = on
 661                                    # If on, enable unlogged table check in SELECT statements.
 662                                    # This initiates queries against system catalog of primary/master
 663                                    # thus increases load of master.
 664                                    # If you are absolutely sure that your system never uses unlogged tables
 665                                    # and you want to save access to primary/master, you could turn this off.
 666                                    # Default is on.
 667
 668 #------------------------------------------------------------------------------
 669 # IN MEMORY QUERY MEMORY CACHE
 670 #------------------------------------------------------------------------------
 671 memory_cache_enabled = off
 672                                                                    # If on, use the memory cache functionality, off by default
 673 memqcache_method = 'shmem'
 674                                                                    # Cache storage method. either 'shmem'(shared memory) or
 675                                                                    # 'memcached'. 'shmem' by default
 676                                    # (change requires restart)
 677 memqcache_memcached_host = 'localhost'
 678                                                                    # Memcached host name or IP address. Mandatory if
 679                                                                    # memqcache_method = 'memcached'.
 680                                                                    # Defaults to localhost.
 681                                    # (change requires restart)
 682 memqcache_memcached_port = 11211
 683                                                                    # Memcached port number. Mondatory if memqcache_method = 'memcached'.
 684                                                                    # Defaults to 11211.
 685                                    # (change requires restart)
 686 memqcache_total_size = 67108864
 687                                                                    # Total memory size in bytes for storing memory cache.
 688                                                                    # Mandatory if memqcache_method = 'shmem'.
 689                                                                    # Defaults to 64MB.
 690                                    # (change requires restart)
 691 memqcache_max_num_cache = 1000000
 692                                                                    # Total number of cache entries. Mandatory
 693                                                                    # if memqcache_method = 'shmem'.
 694                                                                    # Each cache entry consumes 48 bytes on shared memory.
 695                                                                    # Defaults to 1,000,000(45.8MB).
 696                                    # (change requires restart)
 697 memqcache_expire = 0
 698                                                                    # Memory cache entry life time specified in seconds.
 699                                                                    # 0 means infinite life time. 0 by default.
 700                                    # (change requires restart)
 701 memqcache_auto_cache_invalidation = on
 702                                                                    # If on, invalidation of query cache is triggered by corresponding
 703                                                                    # DDL/DML/DCL(and memqcache_expire).  If off, it is only triggered
 704                                                                    # by memqcache_expire.  on by default.
 705                                    # (change requires restart)
 706 memqcache_maxcache = 409600
 707                                                                    # Maximum SELECT result size in bytes.
 708                                                                    # Must be smaller than memqcache_cache_block_size. Defaults to 400KB.
 709                                    # (change requires restart)
 710 memqcache_cache_block_size = 1048576
 711                                                                    # Cache block size in bytes. Mandatory if memqcache_method = 'shmem'.
 712                                                                    # Defaults to 1MB.
 713                                    # (change requires restart)
 714 memqcache_oiddir = '/var/log/pgpool/oiddir'
 715                                                                    # Temporary work directory to record table oids
 716                                    # (change requires restart)
 717 white_memqcache_table_list = ''
 718                                    # Comma separated list of table names to memcache
 719                                    # that don't write to database
 720                                    # Regexp are accepted
 721 black_memqcache_table_list = ''
 722                                    # Comma separated list of table names not to memcache
 723                                    # that don't write to database
 724                                    # Regexp are accepted