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Zeus reports around 40000 zombie channels, no matter how many times I reset the graph.
That number is not important. You will NEVER have 0 zombies, that is impossible. Zombies are the old nodes and channels that went off or are in limbo during the entire history of LN. Your node will NOT use them.
Important is how many online nodes and channels you see.
Your payments arte not affected by the zombies.
But if you see very few online nodes and more zombies, that means you local graph copy is borked.
And you do not have to reset it every time you start Zeus. But is enough 2-3 times per week, so you will have most of the changes in public LN nodes.
The EGS is the responsible one that create the path finding ((based on that graph) on your own device, locally, not depending on any server or LSP.
Keep in mind that a public LN node that stays 24/7/365 online, it would have that graph updated all the time, at ms, with all possible available nodes. But a private node like embedded Zeus do not have to stay online 24/7, so it will have to get a copy from somewhere and read it. If you want to skip this, just keep your Zeus in persistent mode all the time and will not bother you anymore.
I have the zombie channels even immediately after resetting the graph. Zero zombie channels may not be achievable, but is 40000 normal? And if it is, then why does Zeus itself warn me about it? It warns me, suggests I clear the graph, I clear the graph and it warns me again :)
but is 40000 normal?
Go to any LN explorer or run a public LN node with updated LN graph and check the total LN stats. It is around that number or maybe more. Just think about all those busted pleb nodes...
This is what you should see, around 10-12k online nodes
https://1ml.com/statistics
I just open one of my Zeus nodes and I see this. 16k nodes is the right number to see online.
it warns me again :)
Definitely you have sync issues. Logs will tell you. It warns you because is not syncing well.
EGS is not served by neutrino peers. But yes, it start syncing after the neutrino sync.
EGS is the updated LN graph downloaded from a server, usually Olympus or others.
But if that graph is borked locally it could be a problem. Users not reset it so often and keep it for months.
I use to reset it every 2-3 days (even if I do not use it to pay in that time) so all my path finding is updated properly. Yes it could take few seconds more to start Zeus, but I have a proper node sync and never have any issues with paying.
Nevertheless you can switch to other EGS servers in Zeus, see the drop down list.
Always when are issues like these, logs are very helpfull and Zeus can provide quite good ones. Is not complete log, but enough to see what is going on.