/usr/bin/pgpool

pgpool-II version 4.7.2 (tasukiboshi),
  A generic connection pool/replication/load balance server for PostgreSQL

Usage:
  pgpool [ -c] [ -f CONFIG_FILE ] [ -F PCP_CONFIG_FILE ] [ -a HBA_CONFIG_FILE ]
         [ -n ] [ -D ] [ -d ]
  pgpool [ -f CONFIG_FILE ] [ -F PCP_CONFIG_FILE ] [ -a HBA_CONFIG_FILE ]
         [ -m SHUTDOWN-MODE ] stop
  pgpool [ -f CONFIG_FILE ] [ -F PCP_CONFIG_FILE ] [ -a HBA_CONFIG_FILE ] reload

Common options:
  -a, --hba-file=HBA_CONFIG_FILE
                      Set the path to the pool_hba.conf configuration file
                      (default: /etc/pgpool2/pool_hba.conf)
  -f, --config-file=CONFIG_FILE
                      Set the path to the pgpool.conf configuration file
                      (default: /etc/pgpool2/pgpool.conf)
  -k, --key-file=KEY_FILE
                      Set the path to the pgpool key file
                      (default: USER-HOME-DIR/.pgpoolkey)
                      can be over ridden by PGPOOLKEYFILE environment variable
  -F, --pcp-file=PCP_CONFIG_FILE
                      Set the path to the pcp.conf configuration file
                      (default: /etc/pgpool2/pcp.conf)
  -h, --help          Print this help

Start options:
  -C, --clear-oidmaps Clear query cache oidmaps when memqcache_method is memcached
                      (If shmem, discards whenever pgpool starts.)
  -n, --dont-detach   Don't run in daemon mode, does not detach control tty
  -x, --debug-assertions   Turns on various assertion checks, This is a debugging aid
  -D, --discard-status Discard pgpool_status file and do not restore previous status
  -d, --debug         Debug mode

Stop options:
  -m, --mode=SHUTDOWN-MODE
                      Can be "smart", "fast", or "immediate"

Shutdown modes are:
  smart       quit after all clients have disconnected
  fast        quit directly, with proper shutdown
  immediate   the same mode as fast