Hello there, Im trying to reduce the db size by deleting some checkpoints and writes. However, Im not really sure what needs to stay there for HIL and to maintain state within a thread in an agent with several subagents. Should I leave the last checkpoint for a thread with empty ns? Should I worr…

@Samerlkhodary Keeping the newest checkpoint per (thread_id, checkpoint_ns) is sufficient to restore the current running state for that conversation. An empty namespace in streaming means “main agent”; keeping the latest checkpoint for the main-thread (empty namespace) is fine. Each subgraph invo…

Thank you very much for your reply ! The langgraph.json ttl, when set to keep_latest it keeps the last checkpoints I assume or? Also for the write, we should keep all the checkpoint writes entries that are related to the checkpoint ids that we kept? or those are safe to clear?

* "keep_latest ": Retains the thread and latest checkpoint, but deletes older checkpoint data that subsequent runs won’t need which will reduce your DB usage automatically. I would recommend not to manually remove checkpoint write entries as it might mess up time travel and rely only on `keep_lates…

Hi @Samerlkhodary , :one: ttl: "keep_latest" Yes — it keeps: The thread The latest checkpoint per namespace And automatically removes older checkpoints that are no longer needed for future runs. So you don’t need to manually manage old checkpoints in most cases. :two: What about checkpoi…

Checkpoint cleanup

OSS Product Help LangGraph

keenborder786 March 3, 2026, 5:05am 6

@Samerlkhodary Is everything clear now?

Topic		Replies	Views
Subgraph checkpointing LangGraph python-help	8	333	January 17, 2026
Separate Long term memory and Checkpointing LangGraph intro-to-langgraph , python-help	1	423	September 29, 2025
Help Needed: MongoDB Checkpoints Collection Growing Too Large LangGraph js-help	1	503	November 6, 2025
Restoring to checkpoint doesn't resume from node of checkpoint LangGraph python-help	3	370	November 21, 2025
MemorySaver/Checkpointer is not recalling thread discussion LangGraph intro-to-langgraph , js-help	1	529	July 28, 2025

Checkpoint cleanup

Related topics