Line data    Source code

       1             : // Copyright (c) 2021-2022 The Bitcoin Core developers
       2             : // Distributed under the MIT software license, see the accompanying
       3             : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       4             : 
       5             : #include <node/caches.h>
       6             : 
       7             : #include <common/args.h>
       8             : #include <index/txindex.h>
       9             : #include <txdb.h>
      10             : 
      11             : namespace node {
      12           1 : CacheSizes CalculateCacheSizes(const ArgsManager& args, size_t n_indexes)
      13             : {
      14           1 :     int64_t nTotalCache = (args.GetIntArg("-dbcache", nDefaultDbCache) << 20);
      15           1 :     nTotalCache = std::max(nTotalCache, nMinDbCache << 20); // total cache cannot be less than nMinDbCache
      16           1 :     nTotalCache = std::min(nTotalCache, nMaxDbCache << 20); // total cache cannot be greater than nMaxDbcache
      17             :     CacheSizes sizes;
      18           1 :     sizes.block_tree_db = std::min(nTotalCache / 8, nMaxBlockDBCache << 20);
      19           1 :     nTotalCache -= sizes.block_tree_db;
      20           1 :     sizes.tx_index = std::min(nTotalCache / 8, args.GetBoolArg("-txindex", DEFAULT_TXINDEX) ? nMaxTxIndexCache << 20 : 0);
      21           1 :     nTotalCache -= sizes.tx_index;
      22           1 :     sizes.filter_index = 0;
      23           1 :     if (n_indexes > 0) {
      24           0 :         int64_t max_cache = std::min(nTotalCache / 8, max_filter_index_cache << 20);
      25           0 :         sizes.filter_index = max_cache / n_indexes;
      26           0 :         nTotalCache -= sizes.filter_index * n_indexes;
      27           0 :     }
      28           1 :     sizes.coins_db = std::min(nTotalCache / 2, (nTotalCache / 4) + (1 << 23)); // use 25%-50% of the remainder for disk cache
      29           1 :     sizes.coins_db = std::min(sizes.coins_db, nMaxCoinsDBCache << 20); // cap total coins db cache
      30           1 :     nTotalCache -= sizes.coins_db;
      31           1 :     sizes.coins = nTotalCache; // the rest goes to in-memory cache
      32           1 :     return sizes;
      33           0 : }
      34             : } // namespace node