Merge #80160

80160: kvserver: warn more aggressively about slow AddSST apply r=erikgrinaker a=tbg

AddSST application is "just" a hard-link on any kind of reasonable file system,
so it shouldn't take north of 30s ever. Anecdotally, during a recent spat of
experiments, I never saw this logging fire despite raft handling cycles taking
upward of 450s. So this is almost certainly too conservative.

Change the timeout to a 500ms cutoff, which matches the "slow raft ready"
message.

Release note: None


Co-authored-by: Tobias Grieger <[email protected]>

pkg/kv/kvserver/replica_proposal.go

@@ -430,7 +430,7 @@ func (r *Replica) leasePostApplyLocked(
 var addSSTPreApplyWarn = struct {
 	threshold time.Duration
 	log.EveryN
-}{30 * time.Second, log.Every(5 * time.Second)}
+}{500 * time.Millisecond, log.Every(time.Second)}
 
 func addSSTablePreApply(
 	ctx context.Context,