@Entrance
    public final void combine(@SourceFrom int value, @Arg String name, @Arg boolean status) {
        int t = DICT.lookup(name).intValue();
        int t4 = t * 4;
        totalNum++;
        if (!status || value > t4) {
            return;
        }
        if (value > t) {
            tNum++;
        } else {
            sNum++;
        }
    }
Apdex dissatisfaction levels of Tolerating (apdex_t) and Frustrated (apdex_f) indicate how slow site performance
contributes to poor customer experiences in your app. For example:
<p>
10000: All responses are satisfactory. Tolerating responses half satisfy a user. For example, if all responses are
Tolerating, then the Apdex value will be 5000. 0: None of the responses are satisfactory.
oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/metrics/ApdexMetrics.java