fix

src/config/example.toml

@@ -101,7 +101,7 @@ share_buffer_compaction_worker_threads_number = 4
 shared_buffer_flush_ratio = 0.800000011920929
 imm_merge_threshold = 4
 write_conflict_detection_enabled = true
-max_prefetch_block_number = 128
+max_prefetch_block_number = 16
 disable_remote_compactor = false
 share_buffer_upload_concurrency = 8
 compactor_max_task_multiplier = 2.5