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9f8e7b0b3b
32-bit architecture is limited to 4GiB, so it doesn't make sense to set a too high value. Since this setting is performance critical, pick an arbitrary value higher than for -maxmempool but still reasonable.
48 lines
2.1 KiB
C++
48 lines
2.1 KiB
C++
// Copyright (c) 2021-2022 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <node/caches.h>
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#include <common/args.h>
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#include <index/txindex.h>
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#include <kernel/caches.h>
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#include <logging.h>
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#include <util/byte_units.h>
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#include <algorithm>
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#include <string>
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// Unlike for the UTXO database, for the txindex scenario the leveldb cache make
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// a meaningful difference: https://github.com/bitcoin/bitcoin/pull/8273#issuecomment-229601991
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//! Max memory allocated to tx index DB specific cache in bytes.
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static constexpr size_t MAX_TX_INDEX_CACHE{1024_MiB};
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//! Max memory allocated to all block filter index caches combined in bytes.
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static constexpr size_t MAX_FILTER_INDEX_CACHE{1024_MiB};
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//! Maximum dbcache size on 32-bit systems.
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static constexpr size_t MAX_32BIT_DBCACHE{1024_MiB};
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namespace node {
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CacheSizes CalculateCacheSizes(const ArgsManager& args, size_t n_indexes)
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{
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// Convert -dbcache from MiB units to bytes. The total cache is floored by MIN_DB_CACHE and capped by max size_t value.
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size_t total_cache{DEFAULT_DB_CACHE};
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if (std::optional<int64_t> db_cache = args.GetIntArg("-dbcache")) {
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if (*db_cache < 0) db_cache = 0;
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uint64_t db_cache_bytes = SaturatingLeftShift<uint64_t>(*db_cache, 20);
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constexpr auto max_db_cache{sizeof(void*) == 4 ? MAX_32BIT_DBCACHE : std::numeric_limits<size_t>::max()};
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total_cache = std::max<size_t>(MIN_DB_CACHE, std::min<uint64_t>(db_cache_bytes, max_db_cache));
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}
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IndexCacheSizes index_sizes;
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index_sizes.tx_index = std::min(total_cache / 8, args.GetBoolArg("-txindex", DEFAULT_TXINDEX) ? MAX_TX_INDEX_CACHE : 0);
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total_cache -= index_sizes.tx_index;
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if (n_indexes > 0) {
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size_t max_cache = std::min(total_cache / 8, MAX_FILTER_INDEX_CACHE);
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index_sizes.filter_index = max_cache / n_indexes;
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total_cache -= index_sizes.filter_index * n_indexes;
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}
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return {index_sizes, kernel::CacheSizes{total_cache}};
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}
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} // namespace node
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