diff --git a/ctxcdb/pebble/pebble.go b/ctxcdb/pebble/pebble.go
index 5df070ac7e..3cb6b75270 100644
--- a/ctxcdb/pebble/pebble.go
+++ b/ctxcdb/pebble/pebble.go
@@ -269,7 +269,7 @@ func New(file string, cache int, handles int, namespace string, readonly bool) (
 	// These two settings define the conditions under which compaction concurrency
 	// is increased. Specifically, one additional compaction job will be enabled when:
 	// - there is one more overlapping sub-level0;
-	// - there is an additional 512 MB of compaction debt;
+	// - there is an additional 256 MB of compaction debt;
 	//
 	// The maximum concurrency is still capped by MaxConcurrentCompactions, but with
 	// these settings compactions can scale up more readily.