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8 votes
Accepted

Why is my sync slow even with a dbcache of 16000?

Although you've set a dbcache large enough to contain the entire UTXO set, at some point you've restarted. This means that the cache will begin empty and so UTXOs will need to be fetched from the ...
Ava Chow's user avatar
  • 71k
5 votes

What's a rule of thumb for setting the maximum number of connections?

The -maxconnections setting primarily controls how many inbound connections a peer can accept. The number of outbound ones is independently limited (~10), so unless -maxconnections is set lower than ...
Pieter Wuille's user avatar
4 votes
Accepted

What are outgoing and incoming connections and what is the difference between them?

There's a overlap with this post and others but I'll try to directly correct a couple of things here. Why do we have two types of connections, outgoing and incoming? To risk stating the obvious ...
Michael Folkson's user avatar
4 votes

Missing transactions from full node

The full node you are running likely has the standard mempool size (300 MB) and default settings. At the moment (see e.g. https://mempool.space/), transactions with a fee less than 5.88 sat/vB are ...
deyw's user avatar
  • 560
3 votes
Accepted

Broadcast a valid block to network, without a local full node

What message could he send to the node to be confident that his valid block will be broadcast to the network and appended to the chain? You can never be confident. The node you connect to may be ...
Pieter Wuille's user avatar
3 votes

Missing transactions from full node

Bitcoin Core uses a 300 MiB limit for its mempool data structure by default. If enough transactions get submitted to the network, this limit will be reached and Bitcoin Core will start dropping ...
Murch's user avatar
  • 76k
3 votes

addnode + v2transport (BIP324) argument available to the bitcoin.conf?

There is currently no way to specify the v2transport option for the -addnode startup option.
Ava Chow's user avatar
  • 71k
2 votes

Why do nodes have a maximum peer count?

Holding the state of a peer and handling its requests consumes resources. Mainly RAM, bandwidth and CPU. Each additional peer has a fixed cost for a node but a decreasing utility.
Antoine Poinsot's user avatar
1 vote
Accepted

I can't get Inbound Connections on my node

Alright! I just solved it! My full node is now up and running! :D So, there were two problems: I indeed had CGNAT open by my ISP, so I called it and asked them to take it off; Port forwarding on my ...
CMD's user avatar
  • 31
1 vote
Accepted

What does unbroadcastcount in getmempoolinfo mean?

This field counts transactions that have been submitted locally with the sendrawtransaction RPC or the wallet but have not yet been successfully relayed to at least one peer (as a response to a ...
Vojtěch Strnad's user avatar
1 vote

What is a Feeler Connection? When is it used?

The inspiration for feeler connections (and related eclipse mitigation techniques) comes from botnet designs observed in the wild. From the original eclipse attack paper (Ethan Heilman): .. many ...
gimballock's user avatar

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