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dbcache: bump default from 450MB -> 1024MB if enough memory

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If dbcache is unset, bump default from 450MB to 1024MB on 64-bit systems
that have at least 4GB of detected RAM.
This commit is contained in:
Andrew Toth
2026-02-27 09:17:00 -05:00
parent 3a8b4e89f6
commit 5b34f25184
3 changed files with 17 additions and 2 deletions
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16
src/node/caches.cpp
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@@ -27,8 +27,22 @@ static constexpr size_t MAX_FILTER_INDEX_CACHE{1024_MiB};
static constexpr size_t MAX_TXOSPENDER_INDEX_CACHE{1024_MiB};
//! Maximum dbcache size on 32-bit systems.
static constexpr size_t MAX_32BIT_DBCACHE{1024_MiB};
//! Larger default dbcache on 64-bit systems with enough RAM.
static constexpr size_t HIGH_DEFAULT_DBCACHE{1024_MiB};
//! Minimum detected RAM required for HIGH_DEFAULT_DBCACHE.
static constexpr uint64_t HIGH_DEFAULT_DBCACHE_MIN_TOTAL_RAM{4096ULL << 20};
namespace node {
size_t GetDefaultDBCache()
{
if constexpr (sizeof(void*) >= 8) {
if (GetTotalRAM().value_or(0) >= HIGH_DEFAULT_DBCACHE_MIN_TOTAL_RAM) {
return HIGH_DEFAULT_DBCACHE;
}
}
return DEFAULT_DB_CACHE;
}
size_t CalculateDbCacheBytes(const ArgsManager& args)
{
if (auto db_cache{args.GetIntArg("-dbcache")}) {
@@ -37,7 +51,7 @@ size_t CalculateDbCacheBytes(const ArgsManager& args)
constexpr auto max_db_cache{sizeof(void*) == 4 ? MAX_32BIT_DBCACHE : std::numeric_limits<size_t>::max()};
return std::max<size_t>(MIN_DB_CACHE, std::min<uint64_t>(db_cache_bytes, max_db_cache));
}
return DEFAULT_DB_CACHE;
return GetDefaultDBCache();
}
CacheSizes CalculateCacheSizes(const ArgsManager& args, size_t n_indexes)