[tf.data] Increasing roll out of `max_parallelism_v2` experiment to 50%.

PiperOrigin-RevId: 408745581
Change-Id: I1ea3a5d6f2901a63a36af2c2662cfbb91bd890a2
diff --git a/tensorflow/core/data/dataset_utils.cc b/tensorflow/core/data/dataset_utils.cc
index 4b6bd35..2213b39 100644
--- a/tensorflow/core/data/dataset_utils.cc
+++ b/tensorflow/core/data/dataset_utils.cc
@@ -882,7 +882,7 @@
 namespace {
 
 REGISTER_DATASET_EXPERIMENT("max_parallelism", 100);
-REGISTER_DATASET_EXPERIMENT("max_parallelism_v2", 5);
+REGISTER_DATASET_EXPERIMENT("max_parallelism_v2", 50);
 REGISTER_DATASET_EXPERIMENT("min_outer_interleave_parallelism", 0);
 REGISTER_DATASET_EXPERIMENT("inject_prefetch", 5);
 }  // namespace