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coins: compact chainstate in background

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Full chainstate compaction can take minutes on large databases.
Move `CCoinsViewDB::CompactFull()` to a named `utxocompact` one-shot background thread so validation only schedules the work.

When validation selects compaction after a full flush, the chainstate was just written and another write is less likely to be needed immediately.
The coins view destructor waits for completion, and a mutex prevents compaction from using `m_db` while `ResizeCache()` replaces it.

Co-authored-by: Andrew Toth <andrewstoth@gmail.com>
This commit is contained in:
Lőrinc
2026-06-08 16:15:21 +02:00
parent aa021b26f3
commit 394e473d42
4 changed files with 43 additions and 10 deletions
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6
src/validation.cpp
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@@ -2838,9 +2838,11 @@ bool Chainstate::FlushStateToDisk(
m_chainman.m_options.signals->ChainStateFlushed(this->GetRole(), GetLocator(m_chain.Tip()));
}
if (!m_chainman.m_interrupt && m_chainman.m_chainstates.size() == 1) { // Skip AssumeUTXO
if (ShouldCompactChainstate(m_chainman.IsInitialBlockDownload())) {
if (!m_chainman.m_interrupt && ShouldCompactChainstate(m_chainman.IsInitialBlockDownload())) {
try {
CoinsDB().CompactFull();
} catch (const std::exception& e) {
LogWarning("Failed to start chainstate compaction (%s)", e.what());
}
}
}