basic pgbouncer configuration with odoo

pgbouncer.ini

;; database name = connect string
;;
;; connect string params:
;;   dbname= host= port= user= password=
;;   client_encoding= datestyle= timezone=
;;   pool_size= connect_query=
[databases]
odoo1 = host=127.0.0.1 auth_user=odoo dbname=odoo1 port=5432
odoo2 = host=127.0.0.1 auth_user=odoo dbname=odoo2 port=5432
odoo3 = host=127.0.0.1 auth_user=odoo port=5432 dbname=odoo3
odoo4 = host=127.0.0.1 auth_user=odoo dbname=odoo4 port=5433 # odoo - postgres 10 test
postgres = port=5432 host=127.0.0.1 auth_user=postgres

[pgbouncer]

;;;
;;; Administrative settings
;;;

logfile = /var/log/postgresql/pgbouncer.log
pidfile = /var/run/postgresql/pgbouncer.pid

;;;
;;; Where to wait for clients
;;;

; ip address or * which means all ip-s
listen_addr = 127.0.0.1
listen_port = 6432

; unix socket is also used for -R.
; On debian it should be /var/run/postgresql
;unix_socket_dir = /tmp
;unix_socket_mode = 0777
;unix_socket_group =
unix_socket_dir = /var/run/postgresql

auth_file = /etc/pgbouncer/userlist.txt

;; Path to HBA-style auth config
;auth_hba_file =

;; Query to use to fetch password from database.  Result
;; must have 2 columns - username and password hash.
auth_query = SELECT usename, passwd FROM pg_shadow WHERE usename=$1

;;;
;;; Users allowed into database 'pgbouncer'
;;;

; comma-separated list of users, who are allowed to change settings
;admin_users = user2, someadmin, otheradmin

; comma-separated list of users who are just allowed to use SHOW command
;stats_users = stats, root

;;;
;;; Pooler personality questions
;;;

; When server connection is released back to pool:
;   session      - after client disconnects
;   transaction  - after transaction finishes
;   statement    - after statement finishes
pool_mode = transaction

;
; Query for cleaning connection immediately after releasing from client.
; No need to put ROLLBACK here, pgbouncer does not reuse connections
; where transaction is left open.
;
; Query for 8.3+:
;   DISCARD ALL;
;
; Older versions:
;   RESET ALL; SET SESSION AUTHORIZATION DEFAULT
;
; Empty if transaction pooling is in use.
;
server_reset_query = DISCARD ALL


; Whether server_reset_query should run in all pooling modes.
; If it is off, server_reset_query is used only for session-pooling.
;server_reset_query_always = 0

;
; Comma-separated list of parameters to ignore when given
; in startup packet.  Newer JDBC versions require the
; extra_float_digits here.
;
;ignore_startup_parameters = extra_float_digits

;
; When taking idle server into use, this query is ran first.
;   SELECT 1
;
;server_check_query = select 1

; If server was used more recently that this many seconds ago,
; skip the check query.  Value 0 may or may not run in immediately.
;server_check_delay = 30

;; Use <appname - host> as application_name on server.
;application_name_add_host = 0

;;;
;;; Connection limits
;;;

; total number of clients that can connect
max_client_conn = 500

; default pool size.  20 is good number when transaction pooling
; is in use, in session pooling it needs to be the number of
; max clients you want to handle at any moment
default_pool_size = 50

;; Minimum number of server connections to keep in pool.
min_pool_size = 2

; how many additional connection to allow in case of trouble
reserve_pool_size = 20

; if a clients needs to wait more than this many seconds, use reserve pool
;reserve_pool_timeout = 3

; how many total connections to a single database to allow from all pools
;max_db_connections = 0
;max_user_connections = 50

; If off, then server connections are reused in LIFO manner
;server_round_robin = 0

;;;
;;; Logging
;;;

;; Syslog settings
;syslog = 0
;syslog_facility = daemon
;syslog_ident = pgbouncer

; log if client connects or server connection is made
;log_connections = 1

; log if and why connection was closed
;log_disconnections = 1

; log error messages pooler sends to clients
;log_pooler_errors = 1

;; Period for writing aggregated stats into log.
;stats_period = 60

;; Logging verbosity.  Same as -v switch on command line.
;verbose=0

;;;
;;; Timeouts
;;;

;; Close server connection if its been connected longer.
;server_lifetime = 1200

;; Close server connection if its not been used in this time.
;; Allows to clean unnecessary connections from pool after peak.
;server_idle_timeout = 60

;; Cancel connection attempt if server does not answer takes longer.
;server_connect_timeout = 15

;; If server login failed (server_connect_timeout or auth failure)
;; then wait this many second.
;server_login_retry = 15

;; Dangerous.  Server connection is closed if query does not return
;; in this time.  Should be used to survive network problems,
;; _not_ as statement_timeout. (default: 0)
;query_timeout = 0

;; Dangerous.  Client connection is closed if the query is not assigned
;; to a server in this time.  Should be used to limit the number of queued
;; queries in case of a database or network failure. (default: 120)
;query_wait_timeout = 120

;; Dangerous.  Client connection is closed if no activity in this time.
;; Should be used to survive network problems. (default: 0)
;client_idle_timeout = 0

;; Disconnect clients who have not managed to log in after connecting
;; in this many seconds.
;client_login_timeout = 60

;; Clean automatically created database entries (via "*") if they
;; stay unused in this many seconds.
; autodb_idle_timeout = 3600

;; How long SUSPEND/-R waits for buffer flush before closing connection.
;suspend_timeout = 10

;; Close connections which are in "IDLE in transaction" state longer than
;; this many seconds.
;idle_transaction_timeout = 0

;;;
;;; Low-level tuning options
;;;

;; buffer for streaming packets
;pkt_buf = 4096

;; man 2 listen
;listen_backlog = 128

;; Max number pkt_buf to process in one event loop.
;sbuf_loopcnt = 5

;; Maximum Postgres protocol packet size.
;max_packet_size = 2147483647

;; networking options, for info: man 7 tcp

;; Linux: notify program about new connection only if there
;; is also data received.  (Seconds to wait.)
;; On Linux the default is 45, on other OS'es 0.
;tcp_defer_accept = 0

;; In-kernel buffer size (Linux default: 4096)
;tcp_socket_buffer = 0

;; whether tcp keepalive should be turned on (0/1)
;tcp_keepalive = 1

;; following options are Linux-specific.
;; they also require tcp_keepalive=1

;; count of keepaliva packets
;tcp_keepcnt = 0

;; how long the connection can be idle,
;; before sending keepalive packets
;tcp_keepidle = 0

;; The time between individual keepalive probes.
;tcp_keepintvl = 0

;; DNS lookup caching time
;dns_max_ttl = 15

;; DNS zone SOA lookup period
;dns_zone_check_period = 0

;; DNS negative result caching time
;dns_nxdomain_ttl = 15

;;;
;;; Random stuff
;;;

;; Hackish security feature.  Helps against SQL-injection - when PQexec is disabled,
;; multi-statement cannot be made.
;disable_pqexec=0

;; Config file to use for next RELOAD/SIGHUP.
;; By default contains config file from command line.
;conffile

;; Win32 service name to register as.  job_name is alias for service_name,
;; used by some Skytools scripts.
;service_name = pgbouncer
;job_name = pgbouncer

;; Read additional config from the /etc/pgbouncer/pgbouncer-other.ini file
;%include /etc/pgbouncer/pgbouncer-other.ini