PgBouncer

Plugin: go.d.plugin Module: pgbouncer

Overview

This collector monitors PgBouncer servers.

Executed queries:

• SHOW VERSION;
• SHOW CONFIG;
• SHOW DATABASES;
• SHOW STATS;
• SHOW POOLS;

Information about the queries can be found in the PgBouncer Documentation.

This collector is supported on all platforms.

This collector supports collecting metrics from multiple instances of this integration, including remote instances.

Default Behavior

Auto-Detection

This integration doesn't support auto-detection.

Limits

The default configuration for this integration does not impose any limits on data collection.

Performance Impact

The default configuration for this integration is not expected to impose a significant performance impact on the system.

Metrics

Metrics grouped by scope.

The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.

Per PgBouncer instance

These metrics refer to the entire monitored application.

This scope has no labels.

Metrics:

Metric	Dimensions	Unit
pgbouncer.client_connections_utilization	used	percentage

Per database

These metrics refer to the database.

Labels:

Label	Description
database	database name
postgres_database	Postgres database name

Metrics:

Metric	Dimensions	Unit
pgbouncer.db_client_connections	active, waiting, cancel_req	connections
pgbouncer.db_server_connections	active, idle, used, tested, login	connections
pgbouncer.db_server_connections_utilization	used	percentage
pgbouncer.db_clients_wait_time	time	seconds
pgbouncer.db_client_max_wait_time	time	seconds
pgbouncer.db_transactions	transactions	transactions/s
pgbouncer.db_transactions_time	time	seconds
pgbouncer.db_transaction_avg_time	time	seconds
pgbouncer.db_queries	queries	queries/s
pgbouncer.db_queries_time	time	seconds
pgbouncer.db_query_avg_time	time	seconds
pgbouncer.db_network_io	received, sent	B/s

Alerts

There are no alerts configured by default for this integration.

Setup

Prerequisites

Create netdata user

Create a user with stats_users permissions to query your PgBouncer instance.

To create the netdata user:

• Add netdata user to the pgbouncer.ini file:

  stats_users = netdata

• Add a password for the netdata user to the userlist.txt file:

  "netdata" "<PASSWORD>"

• To verify the credentials, run the following command

  psql -h localhost -U netdata -p 6432 pgbouncer -c "SHOW VERSION;" >/dev/null 2>&1 && echo OK || echo FAIL

  When it prompts for a password, enter the password you added to userlist.txt.

Configuration

File

The configuration file name for this integration is go.d/pgbouncer.conf.

You can edit the configuration file using the edit-config script from the Netdata config directory.

cd /etc/netdata 2>/dev/null || cd /opt/netdata/etc/netdata
sudo ./edit-config go.d/pgbouncer.conf

Options

The following options can be defined globally: update_every, autodetection_retry.

Config options

Name	Description	Default	Required
update_every	Data collection frequency.	5	no
autodetection_retry	Recheck interval in seconds. Zero means no recheck will be scheduled.	0	no
dsn	PgBouncer server DSN (Data Source Name). See DSN syntax.	postgres://postgres:[email protected]:6432/pgbouncer	yes
timeout	Query timeout in seconds.	1	no

Examples

TCP socket

An example configuration.

Config

jobs:
  - name: local
    dsn: 'postgres://postgres:[email protected]:6432/pgbouncer'

Unix socket

An example configuration.

Config

jobs:
  - name: local
    dsn: 'host=/tmp dbname=pgbouncer user=postgres port=6432'

Multi-instance

Note: When you define multiple jobs, their names must be unique.

Local and remote instances.

Config

jobs:
  - name: local
    dsn: 'postgres://postgres:[email protected]:6432/pgbouncer'

  - name: remote
    dsn: 'postgres://postgres:[email protected]:6432/pgbouncer'

Troubleshooting

Debug Mode

Important: Debug mode is not supported for data collection jobs created via the UI using the Dyncfg feature.

To troubleshoot issues with the pgbouncer collector, run the go.d.plugin with the debug option enabled. The output should give you clues as to why the collector isn't working.

• Navigate to the plugins.d directory, usually at /usr/libexec/netdata/plugins.d/. If that's not the case on your system, open netdata.conf and look for the plugins setting under [directories].

  cd /usr/libexec/netdata/plugins.d/

• Switch to the netdata user.

  sudo -u netdata -s

• Run the go.d.plugin to debug the collector:

  ./go.d.plugin -d -m pgbouncer

Getting Logs

If you're encountering problems with the pgbouncer collector, follow these steps to retrieve logs and identify potential issues:

• Run the command specific to your system (systemd, non-systemd, or Docker container).
• Examine the output for any warnings or error messages that might indicate issues. These messages should provide clues about the root cause of the problem.

System with systemd

Use the following command to view logs generated since the last Netdata service restart:

journalctl _SYSTEMD_INVOCATION_ID="$(systemctl show --value --property=InvocationID netdata)" --namespace=netdata --grep pgbouncer

System without systemd

Locate the collector log file, typically at /var/log/netdata/collector.log, and use grep to filter for collector's name:

grep pgbouncer /var/log/netdata/collector.log

Note: This method shows logs from all restarts. Focus on the latest entries for troubleshooting current issues.

Docker Container

If your Netdata runs in a Docker container named "netdata" (replace if different), use this command:

docker logs netdata 2>&1 | grep pgbouncer