Merge pull request #10096 from yyforyongyu/increase-gossip-default

Increase the default outgoing bandwidth

Author: Roasbeef

discovery/sync_manager.go

@@ -32,12 +32,12 @@ const (
 	// This is the most that can be sent in a given go. Requests beyond
 	// this, will block indefinitely. Once tokens (bytes are depleted),
 	// they'll be refilled at the DefaultMsgBytesPerSecond rate.
-	DefaultMsgBytesBurst = 2 * 100 * 1_024
+	DefaultMsgBytesBurst = 2 * 1000 * 1_024
 
 	// DefaultMsgBytesPerSecond is the max bytes/s we'll permit for outgoing
 	// messages. Once tokens (bytes) have been taken from the bucket,
 	// they'll be refilled at this rate.
-	DefaultMsgBytesPerSecond = 100 * 1_024
+	DefaultMsgBytesPerSecond = 1000 * 1_024
 
 	// assumedMsgSize is the assumed size of a message if we can't compute
 	// its serialized size. This comes out to 1 KB.

docs/release-notes/release-notes-0.20.0.md

@@ -74,6 +74,10 @@ circuit. The indices are only available for forwarding events saved after v0.20.
   finish under this timeout value. Consider using a larger timeout value if you
   have a slow network.
 
+* The default value for `gossip.msg-rate-bytes` has been
+  [increased](https://github.com/lightningnetwork/lnd/pull/10096) from 100KB to
+  1MB, and `gossip.msg-burst-bytes` has been increased from 200KB to 2MB.
+
 
 ## lncli Additions
 

lncfg/gossip.go

@@ -34,9 +34,9 @@ type Gossip struct {
 
 	AnnouncementConf uint32 `long:"announcement-conf" description:"The number of confirmations required before processing channel announcements."`
 
-	MsgRateBytes uint64 `long:"msg-rate-bytes" description:"The maximum number of bytes of gossip messages that will be sent per second. This is a global limit that applies to all peers."`
+	MsgRateBytes uint64 `long:"msg-rate-bytes" description:"The total rate of outbound gossip messages, expressed in bytes per second. This setting controls the long-term average speed of gossip traffic sent from your node. The rate limit is applied globally across all peers, not per-peer. If the rate of outgoing messages exceeds this value, lnd will start to queue and delay messages to stay within the limit."`
 
-	MsgBurstBytes uint64 `long:"msg-burst-bytes" description:"The maximum number of bytes of gossip messages that will be sent in a burst. This is a global limit that applies to all peers. This value should be set to something greater than 130 KB"`
+	MsgBurstBytes uint64 `long:"msg-burst-bytes" description:"The maximum burst of outbound gossip data, in bytes, that can be sent at once. This works in conjunction with gossip.msg-rate-bytes as part of a token bucket rate-limiting scheme. This value represents the size of the token bucket. It allows for short, high-speed bursts of traffic, with the long-term rate controlled by gossip.msg-rate-bytes. This value must be larger than the maximum lightning message size (~65KB) to allow sending large gossip messages."`
 }
 
 // Parse the pubkeys for the pinned syncers.

sample-lnd.conf

@@ -1763,16 +1763,20 @@
 ; The number of confirmations required before processing channel announcements.
 ; gossip.announcement-conf=6
 
-; The allotted bandwidth rate expressed in bytes/second that will be allocated
-; towards outbound gossip messages. Realized rates above this value will be 
-; throttled. This value is shared across all peers.
-; gossip.msg-rate-bytes=102400
-
-; The amount of bytes of gossip messages that can be sent at a given time. This
-; is used as the amount of tokens in the token bucket algorithm. This value
-; MUST be set to something about 65 KB, otherwise a single max sized message
-; can never be sent.
-; gossip.msg-burst-bytes=204800
+; The total rate of outbound gossip messages, expressed in bytes per second.
+; This setting controls the long-term average speed of gossip traffic sent from
+; your node. The rate limit is applied globally across all peers, not per-peer.
+; If the rate of outgoing messages exceeds this value, lnd will start to queue
+; and delay messages to stay within the limit.
+; gossip.msg-rate-bytes=1024000
+
+; The maximum burst of outbound gossip data, in bytes, that can be sent at once.
+; This works in conjunction with `gossip.msg-rate-bytes` as part of a token
+; bucket rate-limiting scheme. This value represents the size of the token
+; bucket. It allows for short, high-speed bursts of traffic, with the long-term
+; rate controlled by `gossip.msg-rate-bytes`. This value must be larger than the
+; maximum lightning message size (~65KB) to allow sending large gossip messages.
+; gossip.msg-burst-bytes=2048000
 
 [invoices]