pvary commented on code in PR #18144:
URL: https://github.com/apache/iceberg/pull/18144#discussion_r4081410853


##########
docs/docs/flink-configuration.md:
##########
@@ -226,3 +226,22 @@ builder.
 | table.exec.iceberg.fetch-batch-record-count      | 2048                      
           | Target number of records per fetch batch in the Iceberg source 
reader.                                                                         
                                                                          |
 | table.exec.iceberg.worker-pool-size              | max(2, available cpu)    
| Size of the worker pool used to plan or scan manifests. Defaults to the 
shared Iceberg worker pool size, which is controlled by the 
`iceberg.worker.num-threads` system property.                                   
      |
 | table.exec.iceberg.use-v2-sink                   | false                     
           | Use the SinkV2 based `IcebergSink` implementation, see [Sink V2 
based implementation](flink-writes.md#sink-v2-based-implementation).            
                                                                          |
+
+### Lookup options
+
+Flink lookup joins cache the whole projected dimension table in memory, and 
the cache is kept in
+memory for the lifetime of the job, so the dimension table should be populated 
before the join
+starts. See [Lookup Join](flink-queries.md#lookup-join) for details. These 
options are set as table
+options in the DDL, or per query with the `OPTIONS` hint:
+
+```sql
+SELECT o.order_id, u.name

Review Comment:
   Maybe remove the example from here and just link the other page?



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