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// Copyright (c) 2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <node/caches.h>
#include <index/txindex.h>
#include <txdb.h>
#include <util/system.h>
namespace node {
CacheSizes CalculateCacheSizes(const ArgsManager& args, size_t n_indexes)
{
int64_t nTotalCache = (args.GetIntArg("-dbcache", nDefaultDbCache) << 20);
nTotalCache = std::max(nTotalCache, nMinDbCache << 20); // total cache cannot be less than nMinDbCache
nTotalCache = std::min(nTotalCache, nMaxDbCache << 20); // total cache cannot be greater than nMaxDbcache
CacheSizes sizes;
sizes.block_tree_db = std::min(nTotalCache / 8, nMaxBlockDBCache << 20);
nTotalCache -= sizes.block_tree_db;
sizes.tx_index = std::min(nTotalCache / 8, args.GetBoolArg("-txindex", DEFAULT_TXINDEX) ? nMaxTxIndexCache << 20 : 0);
nTotalCache -= sizes.tx_index;
sizes.filter_index = 0;
if (n_indexes > 0) {
int64_t max_cache = std::min(nTotalCache / 8, max_filter_index_cache << 20);
sizes.filter_index = max_cache / n_indexes;
nTotalCache -= sizes.filter_index * n_indexes;
}
sizes.coins_db = std::min(nTotalCache / 2, (nTotalCache / 4) + (1 << 23)); // use 25%-50% of the remainder for disk cache
sizes.coins_db = std::min(sizes.coins_db, nMaxCoinsDBCache << 20); // cap total coins db cache
nTotalCache -= sizes.coins_db;
sizes.coins = nTotalCache; // the rest goes to in-memory cache
return sizes;
}
} // namespace node
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