diff --git a/mars_trans_logger.c b/mars_trans_logger.c
index 928c3a6d..1e506164 100644
--- a/mars_trans_logger.c
+++ b/mars_trans_logger.c
@@ -2134,6 +2134,8 @@ void trans_logger_log(struct trans_logger_brick *brick)
 			brick->delay_callers = delay_callers;
 			wake_up_interruptible_all(&brick->worker_event);
 			wake_up_interruptible_all(&brick->caller_event);
+			if (delay_callers)
+				atomic_inc(&brick->total_delay_count);
 		}
 		if (unlimited) {
 			unlimited = LIMIT_FN(3, 8);
@@ -2491,13 +2493,13 @@ char *trans_logger_statistics(struct trans_logger_brick *brick, int verbose)
 	if (!res)
 		return NULL;
 
-	snprintf(res, 1023, "mode replay=%d continuous=%d replay_code=%d log_reads=%d | replay_start_pos = %lld replay_end_pos = %lld | new_input_nr = %d log_input_nr = %d (old = %d) replay_min_pos1 = %lld replay_max_pos1 = %lld replay_min_pos2 = %lld replay_max_pos2 = %lld | total replay=%d callbacks=%d reads=%d writes=%d flushes=%d (%d%%) wb_clusters=%d writebacks=%d (%d%%) shortcut=%d (%d%%) mshadow=%d sshadow=%d rounds=%d restarts=%d phase1=%d phase2=%d phase3=%d phase4=%d | current shadow_mem_used=%ld/%lld replay=%d mshadow=%d/%d sshadow=%d hash_count=%d pos_count=%d balance=%d/%d/%d/%d fly=%d phase1=%d+%d phase2=%d+%d phase3=%d+%d phase4=%d+%d\n",
+	snprintf(res, 1023, "mode replay=%d continuous=%d replay_code=%d log_reads=%d | replay_start_pos = %lld replay_end_pos = %lld | new_input_nr = %d log_input_nr = %d (old = %d) replay_min_pos1 = %lld replay_max_pos1 = %lld replay_min_pos2 = %lld replay_max_pos2 = %lld | total replay=%d callbacks=%d reads=%d writes=%d flushes=%d (%d%%) wb_clusters=%d writebacks=%d (%d%%) shortcut=%d (%d%%) mshadow=%d sshadow=%d rounds=%d restarts=%d delays=%d phase1=%d phase2=%d phase3=%d phase4=%d | current shadow_mem_used=%ld/%lld replay=%d mshadow=%d/%d sshadow=%d hash_count=%d pos_count=%d balance=%d/%d/%d/%d fly=%d phase1=%d+%d phase2=%d+%d phase3=%d+%d phase4=%d+%d\n",
 		 brick->do_replay, brick->do_continuous_replay, brick->replay_code, brick->log_reads,
 		 brick->replay_start_pos, brick->replay_end_pos,
 		 brick->new_input_nr, brick->log_input_nr, brick->old_input_nr,
 		 brick->inputs[TL_INPUT_LOG1]->replay_min_pos, brick->inputs[TL_INPUT_LOG1]->replay_max_pos, 
 		 brick->inputs[TL_INPUT_LOG2]->replay_min_pos, brick->inputs[TL_INPUT_LOG2]->replay_max_pos, 
-		 atomic_read(&brick->total_replay_count), atomic_read(&brick->total_cb_count), atomic_read(&brick->total_read_count), atomic_read(&brick->total_write_count), atomic_read(&brick->total_flush_count), atomic_read(&brick->total_write_count) ? atomic_read(&brick->total_flush_count) * 100 / atomic_read(&brick->total_write_count) : 0, atomic_read(&brick->total_writeback_cluster_count), atomic_read(&brick->total_writeback_count), atomic_read(&brick->total_writeback_cluster_count) ? atomic_read(&brick->total_writeback_count) * 100 / atomic_read(&brick->total_writeback_cluster_count) : 0, atomic_read(&brick->total_shortcut_count), atomic_read(&brick->total_writeback_count) ? atomic_read(&brick->total_shortcut_count) * 100 / atomic_read(&brick->total_writeback_count) : 0, atomic_read(&brick->total_mshadow_count), atomic_read(&brick->total_sshadow_count), atomic_read(&brick->total_round_count), atomic_read(&brick->total_restart_count), atomic_read(&brick->q_phase1.q_total), atomic_read(&brick->q_phase2.q_total), atomic_read(&brick->q_phase3.q_total), atomic_read(&brick->q_phase4.q_total),
+		 atomic_read(&brick->total_replay_count), atomic_read(&brick->total_cb_count), atomic_read(&brick->total_read_count), atomic_read(&brick->total_write_count), atomic_read(&brick->total_flush_count), atomic_read(&brick->total_write_count) ? atomic_read(&brick->total_flush_count) * 100 / atomic_read(&brick->total_write_count) : 0, atomic_read(&brick->total_writeback_cluster_count), atomic_read(&brick->total_writeback_count), atomic_read(&brick->total_writeback_cluster_count) ? atomic_read(&brick->total_writeback_count) * 100 / atomic_read(&brick->total_writeback_cluster_count) : 0, atomic_read(&brick->total_shortcut_count), atomic_read(&brick->total_writeback_count) ? atomic_read(&brick->total_shortcut_count) * 100 / atomic_read(&brick->total_writeback_count) : 0, atomic_read(&brick->total_mshadow_count), atomic_read(&brick->total_sshadow_count), atomic_read(&brick->total_round_count), atomic_read(&brick->total_restart_count), atomic_read(&brick->total_delay_count), atomic_read(&brick->q_phase1.q_total), atomic_read(&brick->q_phase2.q_total), atomic_read(&brick->q_phase3.q_total), atomic_read(&brick->q_phase4.q_total),
 		 atomic64_read(&brick->shadow_mem_used), brick_global_memlimit, atomic_read(&brick->replay_count), atomic_read(&brick->mshadow_count), brick->shadow_mem_limit, atomic_read(&brick->sshadow_count), atomic_read(&brick->hash_count), atomic_read(&brick->pos_count), atomic_read(&brick->sub_balance_count), atomic_read(&brick->inner_balance_count), atomic_read(&brick->outer_balance_count), atomic_read(&brick->wb_balance_count), atomic_read(&brick->fly_count), atomic_read(&brick->q_phase1.q_queued), atomic_read(&brick->q_phase1.q_flying), atomic_read(&brick->q_phase2.q_queued), atomic_read(&brick->q_phase2.q_flying), atomic_read(&brick->q_phase3.q_queued), atomic_read(&brick->q_phase3.q_flying), atomic_read(&brick->q_phase4.q_queued), atomic_read(&brick->q_phase4.q_flying));
 	return res;
 }
@@ -2517,6 +2519,7 @@ void trans_logger_reset_statistics(struct trans_logger_brick *brick)
 	atomic_set(&brick->total_sshadow_count, 0);
 	atomic_set(&brick->total_round_count, 0);
 	atomic_set(&brick->total_restart_count, 0);
+	atomic_set(&brick->total_delay_count, 0);
 }
 
 
diff --git a/mars_trans_logger.h b/mars_trans_logger.h
index e0001268..05a8012b 100644
--- a/mars_trans_logger.h
+++ b/mars_trans_logger.h
@@ -160,6 +160,7 @@ struct trans_logger_brick {
 	atomic_t total_sshadow_count;
 	atomic_t total_round_count;
 	atomic_t total_restart_count;
+	atomic_t total_delay_count;
 	// queues
 	struct logger_queue q_phase1;
 	struct logger_queue q_phase2;