Method FlushStateToDisk

src/validation.cpp:2491–2662

}

bool CChainState::FlushStateToDisk(
    BlockValidationState &state,
    FlushStateMode mode,
    int nManualPruneHeight)
{
    LOCK(cs_main);
    assert(this->CanFlushToDisk());
    static std::chrono::microseconds nLastWrite{0};
    static std::chrono::microseconds nLastFlush{0};
    std::set<int> setFilesToPrune;
    bool full_flush_completed = false;

    const size_t coins_count = CoinsTip().GetCacheSize();
    const size_t coins_mem_usage = CoinsTip().DynamicMemoryUsage();

    try {
    {
        bool fFlushForPrune = false;
        bool fDoFullFlush = false;

        CoinsCacheSizeState cache_state = GetCoinsCacheSizeState();
        LOCK(m_blockman.cs_LastBlockFile);
        if (fPruneMode && (m_blockman.m_check_for_pruning || nManualPruneHeight > 0) && !fReindex) {
            // make sure we don't prune above the blockfilterindexes bestblocks
            // pruning is height-based
            int last_prune = m_chain.Height(); // last height we can prune
            ForEachBlockFilterIndex([&](BlockFilterIndex& index) {
               last_prune = std::max(1, std::min(last_prune, index.GetSummary().best_block_height));
            });

            if (nManualPruneHeight > 0) {
                LOG_TIME_MILLIS_WITH_CATEGORY("find files to prune (manual)", BCLog::BENCH);

                m_blockman.FindFilesToPruneManual(setFilesToPrune, std::min(last_prune, nManualPruneHeight), m_chain.Height());
            } else {
                LOG_TIME_MILLIS_WITH_CATEGORY("find files to prune", BCLog::BENCH);

                m_blockman.FindFilesToPrune(setFilesToPrune, m_params.PruneAfterHeight(), m_chain.Height(), last_prune, IsInitialBlockDownload());
                m_blockman.m_check_for_pruning = false;
            }
            if (!setFilesToPrune.empty()) {
                fFlushForPrune = true;
                if (!fHavePruned) {
                    m_blockman.m_block_tree_db->WriteFlag("prunedblockfiles", true);
                    fHavePruned = true;
                }
            }
        }
        const auto nNow = GetTime<std::chrono::microseconds>();
        // Avoid writing/flushing immediately after startup.
        if (nLastWrite.count() == 0) {
            nLastWrite = nNow;
        }
        if (nLastFlush.count() == 0) {
            nLastFlush = nNow;
        }
        // The cache is large and we're within 10% and 10 MiB of the limit, but we have time now (not in the middle of a block processing).
        bool fCacheLarge = mode == FlushStateMode::PERIODIC && cache_state >= CoinsCacheSizeState::LARGE;