Add batching config docs (#10601)

* Add batching config docs

* Tech review edits

Author: theletterf

docs/reference/edot-collector/config/default-config-standalone.md

@@ -13,7 +13,7 @@ products:
   - id: edot-collector
 ---
 
-# Default configuration of the EDOT Collector (Standalone)
+# Default configuration of the EDOT Collector (standalone)
 
 The default configuration of the {{edot}} (EDOT) Collector includes pipelines for the collection of logs, host metrics, and data from OpenTelemetry SDKs.
 
@@ -65,7 +65,7 @@ Data is exported directly to {{es}} using the [`elasticsearch`] exporter in `OTe
 
 The application pipeline in the EDOT Collector receives data from OTel SDKs through the [`OTLP`] receiver. While logs and metrics are exported verbatim into {{es}}, traces require two additional components.
 
-{applies_to}`edot_collector: ga 9.2` The [`elasticapm`] processor enriches trace data with additional attributes that improve the user experience in the Elastic Observability UIs. In addition, the [`elasticapm`] connector generates pre-aggregated APM metrics from tracing data.
+{applies_to}`edot_collector: ga 9.2` The [`elasticapm`] processor enriches trace data with additional attributes that improve the user experience in the {{product.observability}} UIs. In addition, the [`elasticapm`] connector generates pre-aggregated APM metrics from tracing data.
 
 Application-related OTel data is ingested into {{es}} in OTel-native format using the [`elasticsearch`] exporter.
 
@@ -102,6 +102,32 @@ Data from OTel SDKs is piped through the [`OTLP`] receiver directly to the OTLP
 
 With the {{motlp}}, there is no need to configure any Elastic-specific components, such as the [`elasticinframetrics`] and [`elasticapm`] processors, the [`elasticapm`] connector, or the [`elasticsearch`] exporter. Edge setup and configuration can be fully vendor agnostic.
 
+### Batching configuration for contrib OpenTelemetry Collector
+
+When using contrib or upstream OpenTelemetry collectors, the following batching configuration is recommended when sending data to the {{motlp}}:
+
+```yaml
+otlp/ingest:
+  endpoint: <ingest endpoint>
+  headers:
+    Authorization: ApiKey <value>
+  sending_queue:
+    enabled: true
+    sizer: bytes
+    queue_size: 50000000 # 50MB uncompressed
+    block_on_overflow: true
+  batch:
+    flush_interval: 1s
+    min_size: 1_000_000 # 1MB uncompressed
+    max_size: 4_000_000 # 4MB uncompressed
+```
+
+The previous configuration leverages an in-memory queue and optimized batching defaults to improve throughput, minimize data loss, and maintain low end-to-end latency.
+
+:::{note}
+The previous configuration is already included in the {{edot}} Collector.
+:::
+
 ## Gateway mode
 
 In Gateway mode, the Collector ingests data from other Collectors running in Agent mode and forwards it to Elastic.