Merge pull request #6776

ab1f560 Support -checkmempool=N, which runs checks on average once every N transactions (Pieter Wuille)

1 files changed, 6 insertions, 3 deletions

diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index 47e8de536..a772e7ade 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -314,7 +314,7 @@ CTxMemPool::CTxMemPool(const CFeeRate& _minReasonableRelayFee) :
     // Sanity checks off by default for performance, because otherwise
     // accepting transactions becomes O(N^2) where N is the number
     // of transactions in the pool
-    fSanityCheck = false;
+    nCheckFrequency = 0;
 
     minerPolicyEstimator = new CBlockPolicyEstimator(_minReasonableRelayFee);
     minReasonableRelayFee = _minReasonableRelayFee;
@@ -487,7 +487,7 @@ void CTxMemPool::removeCoinbaseSpends(const CCoinsViewCache *pcoins, unsigned in
             if (it2 != mapTx.end())
                 continue;
             const CCoins *coins = pcoins->AccessCoins(txin.prevout.hash);
-            if (fSanityCheck) assert(coins);
+            if (nCheckFrequency != 0) assert(coins);
             if (!coins || (coins->IsCoinBase() && ((signed long)nMemPoolHeight) - coins->nHeight < COINBASE_MATURITY)) {
                 transactionsToRemove.push_back(tx);
                 break;
@@ -568,7 +568,10 @@ void CTxMemPool::clear()
 
 void CTxMemPool::check(const CCoinsViewCache *pcoins) const
 {
-    if (!fSanityCheck)
+    if (nCheckFrequency == 0)
+        return;
+
+    if (insecure_rand() >= nCheckFrequency)
         return;
 
     LogPrint("mempool", "Checking mempool with %u transactions and %u inputs\n", (unsigned int)mapTx.size(), (unsigned int)mapNextTx.size());