pub const DEFAULT_MAX_PENDING: u32 = 256;Expand description
Default pending-request cap when max_pending is absent (#270).
Previously absent = unbounded queueing, which allowed memory to
grow without limit when the connection cap was saturated. A
default of 256 bounds the queue so excess requests get 503
“upstream saturated” (backpressure) instead of queueing
indefinitely. This aligns with the AGENTS.md rule that buffering
must be size-capped. Operators who need deeper queueing can set
max_pending explicitly.