private void checkMessageQueueSize(List<HealthStatus> status) {
    long threshold = config.getMaxMessageQueueSize();
    long overflowSize = dmStats.getOverflowQueueSize();
    if (overflowSize > threshold) {
      String s =
          String.format("The size of the overflow queue (%s) exceeds the threshold (%s).",
              overflowSize, threshold);
      status.add(okayHealth(s));
    }
  }
Checks to make sure that the size of the distribution manager's
{@linkplain DMStats#getOverflowQueueSize() overflow} message queue does not exceed the
{@linkplain MemberHealthConfig#getMaxMessageQueueSize threshold}. If not, the status is "okay"
health.
geode-core/src/main/java/org/apache/geode/admin/internal/MemberHealthEvaluator.java