Cache tweak and logging improvements

Author: sipa

src/init.cpp

@@ -1052,18 +1052,20 @@ bool AppInit2(boost::thread_group& threadGroup)
     }
 
     // cache size calculations
-    size_t nTotalCache = (GetArg("-dbcache", nDefaultDbCache) << 20);
-    if (nTotalCache < (nMinDbCache << 20))
-        nTotalCache = (nMinDbCache << 20); // total cache cannot be less than nMinDbCache
-    else if (nTotalCache > (nMaxDbCache << 20))
-        nTotalCache = (nMaxDbCache << 20); // total cache cannot be greater than nMaxDbCache
-    size_t nBlockTreeDBCache = nTotalCache / 8;
+    int64_t nTotalCache = (GetArg("-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 greated than nMaxDbcache
+    int64_t nBlockTreeDBCache = nTotalCache / 8;
     if (nBlockTreeDBCache > (1 << 21) && !GetBoolArg("-txindex", false))
         nBlockTreeDBCache = (1 << 21); // block tree db cache shouldn't be larger than 2 MiB
     nTotalCache -= nBlockTreeDBCache;
-    size_t nCoinDBCache = nTotalCache / 2; // use half of the remaining cache for coindb cache
+    int64_t nCoinDBCache = std::min(nTotalCache / 2, (nTotalCache / 4) + (1 << 23)); // use 25%-50% of the remainder for disk cache
     nTotalCache -= nCoinDBCache;
-    nCoinCacheUsage = nTotalCache;
+    nCoinCacheUsage = nTotalCache; // the rest goes to in-memory cache
+    LogPrintf("Cache configuration:\n");
+    LogPrintf("* Using %.1fMiB for block index database\n", nBlockTreeDBCache * (1.0 / 1024 / 1024));
+    LogPrintf("* Using %.1fMiB for chain state database\n", nCoinDBCache * (1.0 / 1024 / 1024));
+    LogPrintf("* Using %.1fMiB for in-memory UTXO set\n", nCoinCacheUsage * (1.0 / 1024 / 1024));
 
     bool fLoaded = false;
     while (!fLoaded) {

src/main.cpp

@@ -1961,10 +1961,10 @@ void static UpdateTip(CBlockIndex *pindexNew) {
     nTimeBestReceived = GetTime();
     mempool.AddTransactionsUpdated(1);
 
-    LogPrintf("%s: new best=%s  height=%d  log2_work=%.8g  tx=%lu  date=%s progress=%f  cache=%u\n", __func__,
+    LogPrintf("%s: new best=%s  height=%d  log2_work=%.8g  tx=%lu  date=%s progress=%f  cache=%.1fMiB(%utx)\n", __func__,
       chainActive.Tip()->GetBlockHash().ToString(), chainActive.Height(), log(chainActive.Tip()->nChainWork.getdouble())/log(2.0), (unsigned long)chainActive.Tip()->nChainTx,
       DateTimeStrFormat("%Y-%m-%d %H:%M:%S", chainActive.Tip()->GetBlockTime()),
-      Checkpoints::GuessVerificationProgress(chainActive.Tip()), (unsigned int)pcoinsTip->GetCacheSize());
+      Checkpoints::GuessVerificationProgress(chainActive.Tip()), pcoinsTip->DynamicMemoryUsage() * (1.0 / (1<<20)), pcoinsTip->GetCacheSize());
 
     cvBlockChange.notify_all();
 

src/txdb.h

@@ -22,7 +22,7 @@ class uint256;
 //! -dbcache default (MiB)
 static const int64_t nDefaultDbCache = 100;
 //! max. -dbcache in (MiB)
-static const int64_t nMaxDbCache = sizeof(void*) > 4 ? 4096 : 1024;
+static const int64_t nMaxDbCache = sizeof(void*) > 4 ? 16384 : 1024;
 //! min. -dbcache in (MiB)
 static const int64_t nMinDbCache = 4;