Browse Source

Make threshold for flushing more conservative.

Always leave a reasonable buffer of 50MB for usage from newly connected block (once over 50%) and increase the high water mark buffer to 200MB.
0.15
Alex Morcos 8 years ago
parent
commit
1b55e07b7a
  1. 6
      src/txdb.h
  2. 5
      src/validation.cpp

6
src/txdb.h

@ -23,8 +23,10 @@ class uint256;
//! Compensate for extra memory peak (x1.5-x1.9) at flush time. //! Compensate for extra memory peak (x1.5-x1.9) at flush time.
static constexpr int DB_PEAK_USAGE_FACTOR = 2; static constexpr int DB_PEAK_USAGE_FACTOR = 2;
//! No need to flush if at least this much space still available. //! No need to periodic flush if at least this much space still available.
static constexpr int MAX_BLOCK_COINSDB_USAGE = 100 * DB_PEAK_USAGE_FACTOR; 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) //! -dbcache default (MiB)
static const int64_t nDefaultDbCache = 450; static const int64_t nDefaultDbCache = 450;
//! max. -dbcache (MiB) //! max. -dbcache (MiB)

5
src/validation.cpp

@ -2007,8 +2007,9 @@ bool static FlushStateToDisk(CValidationState &state, FlushStateMode mode, int n
int64_t nMempoolSizeMax = GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000; int64_t nMempoolSizeMax = GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000;
int64_t cacheSize = pcoinsTip->DynamicMemoryUsage() * DB_PEAK_USAGE_FACTOR; int64_t cacheSize = pcoinsTip->DynamicMemoryUsage() * DB_PEAK_USAGE_FACTOR;
int64_t nTotalSpace = nCoinCacheUsage + std::max<int64_t>(nMempoolSizeMax - nMempoolUsage, 0); 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). // 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::max((9 * nTotalSpace) / 10, nTotalSpace - MAX_BLOCK_COINSDB_USAGE * 1024 * 1024); 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. // The cache is over the limit, we have to write now.
bool fCacheCritical = mode == FLUSH_STATE_IF_NEEDED && cacheSize > nTotalSpace; 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. // 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.

Loading…
Cancel
Save