Increase the number of bulk workers from 2 to 10

elastic/client.go

@@ -21,7 +21,7 @@ const (
 	// Limiting to 10MiB lets us work on small AWS clusters, but unnecessarily
 	// increases round trips in larger or non-AWS clusters
 	MaxBulkSize  = 10 * 1024 * 1024
-	BulkWorkers  = 2
+	BulkWorkers  = 10
 )
 type Client struct {