Update the max_concurrent_block_requests docs
In we decreased `max_concurrent_block_requests`,
but forgot to update the docs.
@@ -132,10 +132,10 @@ impl Default for MetricsSection {
pub struct SyncSection {
/// The maximum number of concurrent block requests during sync.
///
- /// This is set to a high value by default, so that the concurrency limit is
- /// based only on the number of available peers. However, on a slow network,
- /// making too many concurrent block requests can overwhelm the connection.
- /// Lowering this value may help on slow or unreliable networks.
+ /// This is set to a low value by default, to avoid task and
+ /// network contention. Increasing this value may improve
+ /// performance on machines with many cores and a fast network
+ /// connection.
pub max_concurrent_block_requests: usize,
/// Controls how far ahead of the chain tip the syncer tries to
