Installing and Setting up a Secure multi-port PgBouncer connection pooler on Debian 12 Bookworm for PostgreSQL 16

Prerequisites and Initial Setup

This guide assumes you have a Debian 12 (Bookworm) server with PostgreSQL 16 already installed and running. We’ll be installing PgBouncer from the official Debian repositories for simplicity and stability. Ensure your PostgreSQL server is accessible from the PgBouncer host. For this setup, we’ll configure PgBouncer to listen on multiple ports, each serving a different database or pool configuration, enhancing isolation and management.

First, update your package lists and install the necessary packages:

sudo apt update
sudo apt install -y pgbouncer postgresql-client

Verify the installation and check the version:

pgbouncer --version

PgBouncer Configuration File

The primary configuration file for PgBouncer is located at /etc/pgbouncer/pgbouncer.ini. We will modify this file to define our connection pooler settings. It’s good practice to back up the original file before making changes.

sudo cp /etc/pgbouncer/pgbouncer.ini /etc/pgbouncer/pgbouncer.ini.bak

Now, let’s edit the configuration file. We’ll set up two distinct pools, one for a ‘webapp’ database and another for an ‘analytics’ database, each accessible via a different port. This allows for different connection limits and authentication methods per application.

[databases]
# Example: webapp_db = host=localhost port=5432 dbname=webapp
# Example: analytics_db = host=localhost port=5432 dbname=analytics

# For multi-port setup, we define pools that will be referenced by the listen_ports directive.
# The actual database connection details are defined in the [pgbouncer] section.
# We'll use a placeholder here and define the actual connections in the main section.

[pgbouncer]
; Listen on multiple ports for different pools
listen_ports = 6432, 6433
listen_addr = 0.0.0.0

; Pool mode: session, transaction, or statement.
; 'transaction' is generally recommended for most applications.
pool_mode = transaction

; Maximum number of clients connected to PgBouncer.
max_client_conn = 1000

; Maximum number of server connections per database.
default_max_db_connections = 20

; Maximum number of server connections for a specific database pool.
; This will be overridden by per-database settings if defined.
; max_db_connections = 10

; Minimum number of server connections to keep open per database.
; min_db_connections = 5

; Connection timeout in seconds.
; connection_timeout = 60

; Server connection timeout in seconds.
; server_connection_timeout = 30

; Authentication method.
; 'md5' requires users to have md5-hashed passwords in pg_shadow.
; 'scram-sha-256' is more secure and recommended for PostgreSQL 10+.
; 'cert' uses SSL client certificates.
; 'trust' is insecure and should not be used in production.
auth_type = md5

; Authentication file path.
auth_file = /etc/pgbouncer/userlist.txt

; Database file path.
; This file is used to map pool names to actual database connection strings.
; We will define this mapping directly in the [databases] section for clarity.
; db_file = /etc/pgbouncer/databases.txt

; Log level: debug, info, notice, warning, error.
log_level = info

; Log file path.
logfile = /var/log/pgbouncer/pgbouncer.log

; Stats interval in seconds.
stats_period = 60

; Enable statistics table.
; stats_file = /var/log/pgbouncer/stats.log

; Enable server-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Use a separate connection pool for each database.
; If set to 1, each database will have its own pool.
; If set to 0, all databases share a single pool (not recommended for multi-port).
; This setting is implicitly handled by defining distinct pools in the [databases] section.
; separate_pool_per_database = 1

; Enable DNS caching.
; dns_dns_cache_timeout = 60

; Enable TCP keepalives.
tcp_keepalive = 1

; TCP keepalive interval in seconds.
; tcp_keepalive_interval = 60

; TCP keepalive probes.
; tcp_keepalive_probes = 5

; TCP keepalive time.
; tcp_keepalive_time = 60

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side prepared statements pooling.
; enable_pooling_of_prepared_statements = 0

; Enable client-side