Tonight, I was monitoring on-chain data again and encountered that kind of "lag," at first I thought my internet was acting up.


Later I thought it was probably not the node malfunctioning, but that the middle stack of things was queuing: the indexer is catching up on blocks, the Subgraph hasn't yet stored the new data, and RPC is rate-limited.
When you refresh, it feels like someone is throttling your throat... Anyway, it looks like latency, but it's actually a synchronization issue.

Recently, AI Agents and automated trading narratives have been quite popular, but the more I look at it, the more I think:
Being able to automatically place orders isn't surprising; what’s really impressive is making no rash decisions when "data stalls," otherwise you're just trading safety for speed.

Next time, I plan to compare key queries across two sources (RPC and Subgraph separately), and add a switch for "don't act if data is behind."
How do you usually determine whether it's your own problem or if the indexer/RPC is acting up?
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