diff options
| -rw-r--r-- | src/main.cpp | 23 | ||||
| -rw-r--r-- | src/main.h | 4 |
2 files changed, 26 insertions, 1 deletions
diff --git a/src/main.cpp b/src/main.cpp index c80a4ac922..44d96d614e 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -100,6 +100,7 @@ struct IteratorComparator struct COrphanTx { CTransaction tx; NodeId fromPeer; + int64_t nTimeExpire; }; map<uint256, COrphanTx> mapOrphanTransactions GUARDED_BY(cs_main); map<COutPoint, set<map<uint256, COrphanTx>::iterator, IteratorComparator>> mapOrphanTransactionsByPrev GUARDED_BY(cs_main); @@ -641,7 +642,7 @@ bool AddOrphanTx(const CTransaction& tx, NodeId peer) EXCLUSIVE_LOCKS_REQUIRED(c return false; } - auto ret = mapOrphanTransactions.emplace(hash, COrphanTx{tx, peer}); + auto ret = mapOrphanTransactions.emplace(hash, COrphanTx{tx, peer, GetTime() + ORPHAN_TX_EXPIRE_TIME}); assert(ret.second); BOOST_FOREACH(const CTxIn& txin, tx.vin) { mapOrphanTransactionsByPrev[txin.prevout].insert(ret.first); @@ -689,6 +690,26 @@ void EraseOrphansFor(NodeId peer) unsigned int LimitOrphanTxSize(unsigned int nMaxOrphans) EXCLUSIVE_LOCKS_REQUIRED(cs_main) { unsigned int nEvicted = 0; + static int64_t nNextSweep; + int64_t nNow = GetTime(); + if (nNextSweep <= nNow) { + // Sweep out expired orphan pool entries: + int nErased = 0; + int64_t nMinExpTime = nNow + ORPHAN_TX_EXPIRE_TIME - ORPHAN_TX_EXPIRE_INTERVAL; + map<uint256, COrphanTx>::iterator iter = mapOrphanTransactions.begin(); + while (iter != mapOrphanTransactions.end()) + { + map<uint256, COrphanTx>::iterator maybeErase = iter++; + if (maybeErase->second.nTimeExpire <= nNow) { + nErased += EraseOrphanTx(maybeErase->second.tx.GetHash()); + } else { + nMinExpTime = std::min(maybeErase->second.nTimeExpire, nMinExpTime); + } + } + // Sweep again 5 minutes after the next entry that expires in order to batch the linear scan. + nNextSweep = nMinExpTime + ORPHAN_TX_EXPIRE_INTERVAL; + if (nErased > 0) LogPrint("mempool", "Erased %d orphan tx due to expiration\n", nErased); + } while (mapOrphanTransactions.size() > nMaxOrphans) { // Evict a random orphan: diff --git a/src/main.h b/src/main.h index 9b99ae7c87..191aafe043 100644 --- a/src/main.h +++ b/src/main.h @@ -56,6 +56,10 @@ static const CAmount HIGH_TX_FEE_PER_KB = 0.01 * COIN; static const CAmount HIGH_MAX_TX_FEE = 100 * HIGH_TX_FEE_PER_KB; /** Default for -maxorphantx, maximum number of orphan transactions kept in memory */ static const unsigned int DEFAULT_MAX_ORPHAN_TRANSACTIONS = 100; +/** Expiration time for orphan transactions in seconds */ +static const int64_t ORPHAN_TX_EXPIRE_TIME = 20 * 60; +/** Minimum time between orphan transactions expire time checks in seconds */ +static const int64_t ORPHAN_TX_EXPIRE_INTERVAL = 5 * 60; /** Default for -limitancestorcount, max number of in-mempool ancestors */ static const unsigned int DEFAULT_ANCESTOR_LIMIT = 25; /** Default for -limitancestorsize, maximum kilobytes of tx + all in-mempool ancestors */ |