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Store fewer orphan tx by default, add -maxorphantx option

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There is no reason to store thousands of orphan transactions;
normally an orphan's parents will either be broadcast or
mined reasonably quickly.

This pull drops the maximum number of orphans from 10,000 down
to 100, and adds a command-line option (-maxorphantx) that is
just like -maxorphanblocks to override the default.
This commit is contained in:
Gavin Andresen
2014-09-10 14:08:03 -04:00
committed by Wladimir J. van der Laan
parent af252082ef
commit ea3c1b0806
3 changed files with 5 additions and 3 deletions
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3
src/main.cpp
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@@ -3819,7 +3819,8 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
AddOrphanTx(tx, pfrom->GetId());
// DoS prevention: do not allow mapOrphanTransactions to grow unbounded
unsigned int nEvicted = LimitOrphanTxSize(MAX_ORPHAN_TRANSACTIONS);
unsigned int nMaxOrphanTx = (unsigned int)std::max((int64_t)0, GetArg("-maxorphantx", DEFAULT_MAX_ORPHAN_TRANSACTIONS));
unsigned int nEvicted = LimitOrphanTxSize(nMaxOrphanTx);
if (nEvicted > 0)
LogPrint("mempool", "mapOrphan overflow, removed %u tx\n", nEvicted);
}