p2p: Increase tx relay rate

ajtowns · fanquake · commit 1bc3be19620d · 2025-09-23T10:20:05.000-04:00
In the presence of smaller transactions on the network, blocks can sustain a higher relay rate than 7tx/second. In this event, the per-peer inventory queues can grow too large. This commit bumps the rate up to 14 tx/s (for inbound peers), increasing the safety margin by a factor of 2. Outbound peers continue to receive relayed transactions at 2.5x the rate of inbound peers, for a rate of 35tx/second. Co-Authored-By: Suhas Daftuar <sdaftuar@gmail.com> Github-Pull: #28592 Rebased-From: b81f370
diff --git a/src/net_processing.cpp b/src/net_processing.cpp
@@ -167,7 +167,7 @@ static constexpr auto INBOUND_INVENTORY_BROADCAST_INTERVAL{5s};
 static constexpr auto OUTBOUND_INVENTORY_BROADCAST_INTERVAL{2s};
 /** Maximum rate of inventory items to send per second.
  *  Limits the impact of low-fee transaction floods. */
-static constexpr unsigned int INVENTORY_BROADCAST_PER_SECOND = 7;
+static constexpr unsigned int INVENTORY_BROADCAST_PER_SECOND{14};
 /** Target number of tx inventory items to send per transmission. */
 static constexpr unsigned int INVENTORY_BROADCAST_TARGET = INVENTORY_BROADCAST_PER_SECOND * count_seconds(INBOUND_INVENTORY_BROADCAST_INTERVAL);
 /** Maximum number of inventory items to send per transmission. */
