diff --git a/content/en/database_monitoring/setup_postgres/alloydb.md b/content/en/database_monitoring/setup_postgres/alloydb.md index 90d7b358e26..b8fcc9e33e3 100644 --- a/content/en/database_monitoring/setup_postgres/alloydb.md +++ b/content/en/database_monitoring/setup_postgres/alloydb.md @@ -32,7 +32,7 @@ Performance impact Database Monitoring runs as an integration on top of the base Agent ([see benchmarks][1]). Proxies, load balancers, and connection poolers -: The Datadog Agent must connect directly to the host being monitored. For self-hosted databases, `127.0.0.1` or the socket is preferred. The Agent should not connect to the database through a proxy, load balancer, or connection pooler such as `pgbouncer`. If the Agent connects to different hosts while it is running (as in the case of failover, load balancing, and so on), the Agent calculates the difference in statistics between two hosts, producing inaccurate metrics. +: The Datadog Agent must connect directly to the host being monitored. For self-hosted databases, use `127.0.0.1` or the socket. The Agent should not connect to the database through a proxy, load balancer, or connection pooler such as `pgbouncer`. If the Agent connects to different hosts while it is running (as in the case of failover, load balancing, and so on), the Agent calculates the difference in statistics between two hosts, producing inaccurate metrics. Data security considerations : See [Sensitive information][2] for information about what data the Agent collects from your databases and how to ensure it is secure. @@ -41,22 +41,29 @@ Data security considerations Configure the following [parameters][3] in [Database flags][4] and then **restart the server** for the settings to take effect. For more information about these parameters, see the [Postgres documentation][5]. +**Required parameters** + | Parameter | Value | Description | | --- | --- | --- | | `track_activity_query_size` | `4096` | Required for collection of larger queries. Increases the size of SQL text in `pg_stat_activity`. If left at the default value then queries longer than `1024` characters will not be collected. | -| `pg_stat_statements.track` | `all` | Optional. Enables tracking of statements within stored procedures and functions. | -| `pg_stat_statements.max` | `10000` | Optional. Increases the number of normalized queries tracked in `pg_stat_statements`. This setting is recommended for high-volume databases that see many different types of queries from many different clients. | -| `pg_stat_statements.track_utility` | `off` | Optional. Disables utility commands like PREPARE and EXPLAIN. Setting this value to `off` means only queries like SELECT, UPDATE, and DELETE are tracked. | -| `track_io_timing` | `on` | Optional. Enables collection of block read and write times for queries. | + +**Optional parameters** + +| Parameter | Value | Description | +| --- | --- | --- | +| `pg_stat_statements.track` | `all` | Enables tracking of statements within stored procedures and functions. | +| `pg_stat_statements.max` | `10000` | Increases the number of normalized queries tracked in `pg_stat_statements`. Recommended for high-volume databases that see many different types of queries from many different clients. | +| `pg_stat_statements.track_utility` | `off` | Disables utility commands like PREPARE and EXPLAIN. Setting this value to `off` means only queries like SELECT, UPDATE, and DELETE are tracked. | +| `track_io_timing` | `on` | Enables collection of block read and write times for queries. | ## Grant the Agent access -The Datadog Agent requires read-only access to the database server in order to collect statistics and queries. +The Datadog Agent requires read-only access to the database server to collect statistics and queries. -The following SQL commands should be executed on the **primary** database server (the writer) in the cluster if Postgres is replicated. Choose a PostgreSQL database on the database server for the Agent to connect to. The Agent can collect telemetry from all databases on the database server regardless of which one it connects to, so a good option is to use the default `postgres` database. Choose a different database only if you need the Agent to run [custom queries against data unique to that database][6]. +Run the following SQL commands on the **primary** database server (the writer) in the cluster if Postgres is replicated. The Agent can collect telemetry from all databases on the server regardless of which database it connects to. Use the default `postgres` database unless you need the Agent to run [custom queries against data unique to a different database][6]. -Connect to the chosen database as a superuser (or another user with sufficient permissions). For example, if your chosen database is `postgres`, connect as the `postgres` user using [psql][7] by running: +Connect to your chosen database as a superuser (or another user with sufficient permissions). For example, to connect to the `postgres` database using [psql][7]: ```bash psql -h mydb.example.com -d postgres -U postgres @@ -80,7 +87,9 @@ CREATE EXTENSION IF NOT EXISTS pg_stat_statements;
For data collection or custom metrics that require querying additional tables, you may need to grant the SELECT permission on those tables to the datadog user. Example: grant SELECT on <TABLE_NAME> to datadog;. See PostgreSQL custom metric collection for more information.
-Create the function **in every database** to enable the Agent to collect explain plans. +### Create the explain plan function + +Create the following function **in every database** to enable the Agent to collect explain plans: ```SQL CREATE OR REPLACE FUNCTION datadog.explain_statement( @@ -110,7 +119,7 @@ SECURITY DEFINER; ### Securely store your password {{% dbm-secret %}} -### Verify +### Verify database permissions To verify the permissions are correct, run the following commands to confirm the Agent user is able to connect to the database and read the core tables: @@ -388,9 +397,10 @@ The Cluster Agent automatically registers this configuration and begin running t See the [Postgres integration spec][13] for additional information on setting `project_id` and `instance_id` fields. -### Validate +### Verify Agent setup [Run the Agent's status subcommand][9] and look for `postgres` under the Checks section. Or visit the [Databases][10] page to get started! + ## Example Agent Configurations {{% dbm-postgres-agent-config-examples %}} @@ -400,7 +410,7 @@ To collect more comprehensive database metrics from AlloyDB, install the [AlloyD ## Troubleshooting -If you have installed and configured the integrations and Agent as described and it is not working as expected, see [Troubleshooting][12] +If you have installed and configured the integrations and Agent as described and it is not working as expected, see [Troubleshooting][12]. ## Further reading