https://github.com/openjdk/jdk/blob/c9ab330b7bdd3cc2410ffdb336a63aa0ac7256a3/src/hotspot/share/runtime/arguments.cpp#L1606-L1611

      if (reasonable_max > max_coop_heap) {
        if (FLAG_IS_ERGO(UseCompressedOops) && has_ram_limit) {
          aot_log_info(aot)("UseCompressedOops disabled due to "
                            "max heap %zu > compressed oop heap %zu. "
                            "Please check the setting of MaxRAMPercentage %5.2f.",
                            reasonable_max, (size_t)max_coop_heap, MaxRAMPercentage);

The message should be logged to the (gc, heap, coops) channel.