↓ 4 callersMethodsplitMetaGroupSizeThe group size of split meta, if the meta size exceeds the group size, the meta will be will be divided into multiple groups.
flink-cdc-connect/flink-cdc-source-connectors/flink-connector-db2-cdc/src/main/java/org/apache/flink/cdc/connectors/db2/source/Db2SourceBuilder.java:117