Issue Details

Number

29993

Title

Pause IBD during AssumeUTXO snapshot load

Description

### Please describe the feature you'd like to see added. The `loadtxoutset` RPC call should cause IBD to pause until the snapshot is loaded and the snapshot chain is activated. ### Is your feature related to a problem, if so please describe it. When I start a fresh node and load a mainnet shapshot (#28553) any progress is completely buried in the log. More importantly, I get the strong impression, though haven't properly tested this, that the IBD process slows down the snapshot load. This makes sense given the amount of I/O involved. It's definitely slower than the process of creating the snapshot. On my AMD Ryzen 7950x machine the IBD reaches block 300,000 while the snapshot has only loaded 71.2% (where is triggers a cache flush). By the time 100% is loaded IBD is at 324,000. When the snapshot chainstate is saved IBD reaches 362,000. ### Describe the solution you'd like Pause IBD until the snapshot is loaded and the snapshot chain is activated. ### Describe any alternatives you've considered 1. Do nothing 2. Keep IBD going but at low priority (how???) ### Please leave any additional context _No response_

URL

https://github.com/bitcoin/bitcoin/issue/29993

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