stablum commented on issue #19957:
URL: https://github.com/apache/airflow/issues/19957#issuecomment-1095093672

   Hmm, actually the last recorded query starts with: 
   ```
   UPDATE serialized_dag SET data='{"__version": 1, "dag": {"_dag_id": "down    
load_and_preprocess_sets", "schedule_interval": null, "_description": 
"Downloads sets data from IATI.cloud", "_task_group": {"_group_id": null, 
"prefix_    group_id": true, "tooltip": "", "ui_color": "CornflowerBlue", 
"ui_fgcolor": "#000", "children": {"codelists": ["operator", "codelists"], 
"clear_activity    _ids": ["operator", "clear_activity_ids"], 
"clear_activity_date": ["operator", "clear_activity_date"], "clear_budget": 
["operator", "clear_budget"], "cl    ear_result": ["operator", "clear_result"], 
"clear_participating_org": ["operator", "clear_participating_org"], 
"clear_contact_info": ["operator", "clear    _contact_info"], "clear_location": 
["operator", "clear_location"], "clear_sector": ["operator", "clear_sector"], 
"clear_policy_marker": ["operator", "cl    ear_policy_marker"], 
"clear_default_aid_type": ["operator", "clear_default_aid_type"], 
"clear_transaction": ["operator", "clear_transactio
 n"], "clear_ac    tivity_without_rels": ["operator", 
"clear_activity_without_rels"], "download_0": ["operator", "download_0"], 
"persist_activity_ids_0": ["operator", "per    sist_activity_ids_0"], 
"parse_0": ["operator", "parse_0"], "clear_page_0": ["operator", 
"clear_page_0"], "persist_0_activity_date": ["operator", "persis    
t_0_activity_date"], "persist_0_budget": ["operator", "persist_0_budget"], 
"persist_0_result": ["operator", "persist_0_result"], "persist_0_participatin   
 g_org": ["operator", "persist_0_participating_org"], "persist_0_contact_info
   ...
   ```
   
   So I'm wondering if storing the serialization of such a huge dag is creating 
problems. Maybe deactivating the serialization would prevent the issue?


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