damccorm commented on code in PR #31721:
URL: https://github.com/apache/beam/pull/31721#discussion_r1672016838


##########
sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/BigQueryOptions.java:
##########
@@ -122,6 +145,11 @@ public interface BigQueryOptions
 
   void setStorageWriteMaxInflightBytes(Long value);
 
+  @Description(
+      "Enables multiplexing mode, where multiple tables can share the same 
connection. Only available when writing with STORAGE_API_AT_LEAST_ONCE"
+          + " mode. This is recommended if your write operation is creating 
20+ connections. When using multiplexing, consider tuning "
+          + "the number of connections created by the connection pool with 
minConnectionPoolConnections and maxConnectionPoolConnections. "
+          + "For more information, see 
https://cloud.google.com/bigquery/docs/write-api-best-practices#connection_pool_management";)
   @Default.Boolean(false)

Review Comment:
   +1 to trying this, I'd probably vote to to do it separately after the 
release cut though to give it time to bake and so we can check on benchmarks. 



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