--- title: Multi-receiver configuration for MSSQL with NRDOT source: https://docs.newrelic.com/docs/opentelemetry/db360/mssql/multi-receiver --- You can configure the NRDOT Collector to monitor multiple MSSQL instances from one collector. This is useful if you have multiple MSSQL instances running on different hosts and want to collect metrics from all of them using a single NRDOT Collector instance. ## Prerequisites [#prerequisites] - NRDOT is installed and configured for your MSSQL instances: - [Linux RDS](https://docs.newrelic.com/docs/opentelemetry/db360/mssql/linux-rds) - [Linux Hosted](https://docs.newrelic.com/docs/opentelemetry/db360/mssql/linux-hosted) - Windows self-hosted: - [SQL Server authentication](https://docs.newrelic.com/docs/opentelemetry/db360/mssql/windows-hosted-sql) - [Windows Domain authentication](https://docs.newrelic.com/docs/opentelemetry/db360/mssql/windows-hosted-domain) - [gMSA](https://docs.newrelic.com/docs/opentelemetry/db360/mssql/windows-hosted-gmsa) - Windows RDS: - [SQL Server authentication](https://docs.newrelic.com/docs/opentelemetry/db360/mssql/windows-rds-sql) - [Windows Domain authentication](https://docs.newrelic.com/docs/opentelemetry/db360/mssql/windows-rds-domain) - [gMSA](https://docs.newrelic.com/docs/opentelemetry/db360/mssql/windows-rds-gmsa) ## Add multi-receiver configuration [#multi] The following example shows how to configure the NRDOT Collector to monitor two MSSQL instances using a multi-receiver configuration. The first instance, `nrsqlserver/1`, carries the complete configuration and acts as the anchor; the second instance, `nrsqlserver/2`, inherits every shared setting through the YAML merge key and overrides only its own connection details. You can add more receivers as needed for additional instances. ```yaml receivers: # Base SQL Server instance: defines the anchor all others inherit from. nrsqlserver/1: &nrsqlserver-common username: "" password: "" server: "" port: 1433 collection_interval: 15s metrics: sqlserver.database.count: enabled: true sqlserver.database.io: enabled: true sqlserver.database.latency: enabled: true sqlserver.database.operations: enabled: true sqlserver.database.tempdb.space: enabled: true sqlserver.database.tempdb.version_store.size: enabled: true sqlserver.deadlock.rate: enabled: true sqlserver.os.wait.duration: enabled: true sqlserver.processes.blocked: enabled: true sqlserver.memory.grants.pending.count: enabled: true sqlserver.database.file.size: enabled: true sqlserver.memory.area: enabled: true events: db.server.query_sample: enabled: true db.server.top_query: enabled: true db.server.query_plan: enabled: true db.server.top_procedure: enabled: true top_query_collection: lookback_time: 60s max_query_sample_count: 1000 top_query_count: 250 collection_interval: 60s collect_full_query_text: true allowed_comment_keys: - nr_service_guid query_sample_collection: max_rows_per_query: 100 collect_full_query_text: true allowed_comment_keys: - nr_service_guid top_procedure_collection: max_procedure_sample_count: 1000 top_procedure_count: 250 collection_interval: 60s resource_attributes: db.system.version: enabled: true sqlserver.db.edition: enabled: true # Second SQL Server instance: inherits all settings from nrsqlserver/1, # overrides only the connection-specific fields. # Additional SQL Server instances can be added here following the same pattern. nrsqlserver/2: <<: *nrsqlserver-common username: "" password: "" server: "" port: 1433 processors: memory_limiter: check_interval: ${env:NR_MEM_LIMITER_CHECK_INTERVAL:-1s} limit_mib: ${env:NR_MEM_LIMITER_LIMIT_MIB:-200} spike_limit_mib: ${env:NR_MEM_LIMITER_SPIKE_MIB:-50} exporters: otlp: endpoint: https://otlp.nr-data.net:4318 headers: api-key: tls: insecure: false compression: gzip sending_queue: enabled: true sizer: bytes queue_size: 100_000_000 num_consumers: 10 batch: sizer: bytes max_size: 1_000_000 min_size: 0 flush_timeout: 5s service: telemetry: metrics: level: none # Metrics and logs pipelines for multiple SQL Server instances pipelines: metrics: receivers: [nrsqlserver/1, nrsqlserver/2] processors: [memory_limiter] exporters: [otlp] logs: receivers: [nrsqlserver/1, nrsqlserver/2] processors: [memory_limiter] exporters: [otlp] ``` The `<<: *nrsqlserver-common` merge key inherits all settings from `nrsqlserver/1`, including its metric catalog, events, query/procedure collection settings, and resource attributes. Any field you explicitly set after it, such as `username`, `password`, `server`, and `port`, overrides the inherited value for that specific receiver instance. > #### ⚠️ IMPORTANT > > Each time you add a new receiver instance (for example, `nrsqlserver/3`), also add it to the `receivers` list in both the `metrics` and `logs` pipelines under `service.pipelines`. A receiver defined in the `receivers` block but missing from `service.pipelines` won't collect any data. > #### 💡 TIP > > For Windows self-hosted and RDS environments using domain or gMSA authentication, use the `datasource` field instead of `username`/`password`/`server`/`port`. See [Windows self-hosted instrumentation (Windows Domain authentication)](https://docs.newrelic.com/docs/opentelemetry/db360/mssql/windows-hosted-domain) for the `datasource` format. ## Restart NRDOT Collector [#restart] Restart the NRDOT Collector service for configuration changes to take effect. The collector loads configuration parameters once at startup and doesn't support hot-reloading. Any changes made to the configuration while the collector is running remain inactive until the process restarts. ```bash sudo systemctl restart nrdot-collector ``` ## Related documentation [#related-docs] [Linux instrumentation for self-hosted environments](https://docs.newrelic.com/docs/opentelemetry/db360/mssql/linux-hosted) Learn how to set up MSSQL monitoring in self-hosted Linux environments with New Relic. [Windows instrumentation for self-hosted environments](https://docs.newrelic.com/docs/opentelemetry/db360/mssql/windows-hosted-sql) Learn how to set up MSSQL monitoring in self-hosted Windows environments with New Relic. [Set up APM-database correlation](https://docs.newrelic.com/docs/opentelemetry/db360/capabilities/db-apm) Learn how to correlate your application performance with database operations in New Relic.