LangGraph Advanced Persistance - Custom Checkpointers

This is an advanced video on how to implement custom, advanced checkpointers with LangGraph.

[lbasavaraj]

You are a legend man. Thanks for all these videos.

[chakerayachi]

dude big thanks for every video you upload i've learned a lot from your videos

[abhishekchintagunta]

thanks for the timely tutorial, very helpful

[mahmoudghareeb]

thank you very much, Can you send the link to the code, please?

[todormishinev]

What about if we have already a legacy chat memory in some format ... like millions of rows in many conversations, I would like to use the redis checkpointer and use the checkpointer like a short term memory with expire timer (that solves the problem with memory build up also). Then if the graph is without a checkpoint at current state I can use the long-term history for loading a list of the Human/AI messages + new HumanMessage ... Thanks for the video, not many people talking about the memory management and if you are using it in production env it's a problem, I wish there will be a more streamlined alternative for this

[b]

Great video (as always). Quick question. I am running into an error in cell 11 where we execute this line for the first time:
runnable.invoke({"messages": input_message}, config=config)

The error says:
"UndefinedTable: relation "checkpoints" does not exist"

I have run all prior cells (the Postgres database seems to be up and running). Any ideas? Thank you!

[say.xy_]

Hey man, I'm little confused, lets say I wanted to show updated message history with every new message coming from user (api call from frontend) So if im using langgraph all I need to do is generate thread id (when new conversation is initiated) correspond to user id in my backend, and return the response to user where I can map the human and ai message?

[revathitalla]

InterfaceError: connection already closed.

Thanks for this video! I am getting this error when I pick up a conversation from session history. How do I keep the connection open for long?

[Investwithwisdome]

I am still confused, is Persistance used for adding ChatHistory?
Why are we not using ChatMessageHistory?
Can we use ChatMessageHistory in our Langgraph ChatBots?

[sktime]

Apart from latest checkpoint, all the previous checkpoints are not used anywhere and containing redundant information that already latest checkpoint has, why are we storing them ?
Why cant we just update the existing row for a thread_id in the put function instead of inserting new row