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@ -428,7 +428,7 @@ void BlockchainLMDB::check_and_resize_for_batch(uint64_t batch_num_blocks)
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{
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LOG_PRINT_L3("BlockchainLMDB::" << __func__);
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LOG_PRINT_L1("[" << __func__ << "] " << "checking DB size");
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const uint64_t min_increase_size = 128 * (1 << 20);
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const uint64_t min_increase_size = 512 * (1 << 20);
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uint64_t threshold_size = 0;
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uint64_t increase_size = 0;
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if (batch_num_blocks > 0)
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@ -464,6 +464,7 @@ uint64_t BlockchainLMDB::get_estimated_batch_size(uint64_t batch_num_blocks) con
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// batch size estimate * batch safety factor = final size estimate
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// Takes into account "reasonable" block size increases in batch.
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float batch_safety_factor = 1.7f;
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float batch_fudge_factor = batch_safety_factor * batch_num_blocks;
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// estimate of stored block expanded from raw block, including denormalization and db overhead.
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// Note that this probably doesn't grow linearly with block size.
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float db_expand_factor = 4.5f;
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@ -485,6 +486,13 @@ uint64_t BlockchainLMDB::get_estimated_batch_size(uint64_t batch_num_blocks) con
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{
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LOG_PRINT_L1("No existing blocks to check for average block size");
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}
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else if (m_cum_count)
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{
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avg_block_size = m_cum_size / m_cum_count;
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LOG_PRINT_L1("average block size across recent " << m_cum_count << " blocks: " << avg_block_size);
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m_cum_size = 0;
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m_cum_count = 0;
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}
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else
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{
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for (uint64_t block_num = block_start; block_num <= block_stop; ++block_num)
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@ -502,8 +510,10 @@ uint64_t BlockchainLMDB::get_estimated_batch_size(uint64_t batch_num_blocks) con
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avg_block_size = min_block_size;
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LOG_PRINT_L1("estimated average block size for batch: " << avg_block_size);
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threshold_size = avg_block_size * db_expand_factor * batch_num_blocks;
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threshold_size = threshold_size * batch_safety_factor;
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// bigger safety margin on smaller block sizes
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if (batch_fudge_factor < 5000.0)
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batch_fudge_factor = 5000.0;
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threshold_size = avg_block_size * db_expand_factor * batch_fudge_factor;
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return threshold_size;
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}
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@ -570,6 +580,8 @@ void BlockchainLMDB::add_block(const block& blk, const size_t& block_size, const
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if (result)
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throw0(DB_ERROR(std::string("Failed to add block hash to db transaction: ").append(mdb_strerror(result)).c_str()));
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m_cum_size += block_size;
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m_cum_count++;
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}
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void BlockchainLMDB::remove_block()
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@ -945,6 +957,8 @@ BlockchainLMDB::BlockchainLMDB(bool batch_transactions)
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m_write_batch_txn = nullptr;
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m_batch_active = false;
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m_height = 0;
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m_cum_size = 0;
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m_cum_count = 0;
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m_hardfork = nullptr;
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}
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@ -1208,6 +1222,8 @@ void BlockchainLMDB::reset()
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txn.commit();
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m_height = 0;
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m_num_outputs = 0;
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m_cum_size = 0;
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m_cum_count = 0;
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}
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std::vector<std::string> BlockchainLMDB::get_filenames() const
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