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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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2
src/test/coins_tests.cpp
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@@ -1078,7 +1078,7 @@ BOOST_FIXTURE_TEST_CASE(coins_db_leveldb_layout, FlushTest)
cache.Sync();
BOOST_CHECK_EQUAL(level2_files(base), 0);
WITH_LOCK(::cs_main, base.CompactFull());
WITH_LOCK(::cs_main, return base.CompactFull()).wait();
BOOST_CHECK_EQUAL(level2_files(base), 1);
BOOST_CHECK(*Assert(base.GetCoin(outpoint)) == coin);