diff options
| -rw-r--r-- | src/txdb.h | 8 | ||||
| -rw-r--r-- | src/validation.cpp | 7 |
2 files changed, 11 insertions, 4 deletions
diff --git a/src/txdb.h b/src/txdb.h index 7f5cf2b583..d9214ba618 100644 --- a/src/txdb.h +++ b/src/txdb.h @@ -21,8 +21,14 @@ class CBlockIndex; class CCoinsViewDBCursor; class uint256; +//! Compensate for extra memory peak (x1.5-x1.9) at flush time. +static constexpr int DB_PEAK_USAGE_FACTOR = 2; +//! No need to periodic flush if at least this much space still available. +static constexpr int MAX_BLOCK_COINSDB_USAGE = 200 * DB_PEAK_USAGE_FACTOR; +//! Always periodic flush if less than this much space still available. +static constexpr int MIN_BLOCK_COINSDB_USAGE = 50 * DB_PEAK_USAGE_FACTOR; //! -dbcache default (MiB) -static const int64_t nDefaultDbCache = 300; +static const int64_t nDefaultDbCache = 450; //! max. -dbcache (MiB) static const int64_t nMaxDbCache = sizeof(void*) > 4 ? 16384 : 1024; //! min. -dbcache (MiB) diff --git a/src/validation.cpp b/src/validation.cpp index 7eae5fd800..1f5b317441 100644 --- a/src/validation.cpp +++ b/src/validation.cpp @@ -2006,10 +2006,11 @@ bool static FlushStateToDisk(CValidationState &state, FlushStateMode mode, int n nLastSetChain = nNow; } int64_t nMempoolSizeMax = GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000; - int64_t cacheSize = pcoinsTip->DynamicMemoryUsage() * 2; // Compensate for extra memory peak (x1.5-x1.9) at flush time. + int64_t cacheSize = pcoinsTip->DynamicMemoryUsage() * DB_PEAK_USAGE_FACTOR; int64_t nTotalSpace = nCoinCacheUsage + std::max<int64_t>(nMempoolSizeMax - nMempoolUsage, 0); - // The cache is large and we're within 10% and 100 MiB of the limit, but we have time now (not in the middle of a block processing). - bool fCacheLarge = mode == FLUSH_STATE_PERIODIC && cacheSize > std::max((9 * nTotalSpace) / 10, nTotalSpace - 100 * 1024 * 1024); + // The cache is large and we're within 10% and 200 MiB or 50% and 50MiB of the limit, but we have time now (not in the middle of a block processing). + bool fCacheLarge = mode == FLUSH_STATE_PERIODIC && cacheSize > std::min(std::max(nTotalSpace / 2, nTotalSpace - MIN_BLOCK_COINSDB_USAGE * 1024 * 1024), + std::max((9 * nTotalSpace) / 10, nTotalSpace - MAX_BLOCK_COINSDB_USAGE * 1024 * 1024)); // The cache is over the limit, we have to write now. bool fCacheCritical = mode == FLUSH_STATE_IF_NEEDED && cacheSize > nTotalSpace; // It's been a while since we wrote the block index to disk. Do this frequently, so we don't need to redownload after a crash. |