Hello,

I'm not sure if that normal or not, but I did search about this point in the 
documentation and I did find anything.


In any TICK script I create, I always find 



An example for `cpu_example` task:

```
var query_data = batch
    |query('''
        SELECT percentile("usage_user", 95) as query_value
        FROM "telegraf"."15d"."cpu"
    ''')
        .period(5m)
        .every(4m)
        .fill('none')
        .groupBy(time(1m), 'host')

```

And here the DOT part of output of `kapacitor show`:
```
kapacitor show cpu_example

DOT:
digraph CPU_cpu_usage {
graph [throughput="0.00 batches/s"];

query1 [avg_exec_time_ns="1.009318388s" batches_queried="2912" 
connect_errors="0" points_queried="14460" query_errors="0" ];

stats2 [avg_exec_time_ns="1.179459ms" ];
stats2 -> derivative3 [processed="2705"];

derivative3 [avg_exec_time_ns="6.999µs" ];
derivative3 -> alert4 [processed="2704"];

alert4 [alerts_triggered="2704" avg_exec_time_ns="177.822µs" 
crits_triggered="2704" infos_triggered="0" oks_triggered="0" 
warns_triggered="0" ];
```


So the question is, what are these extra "stats", "derivative", and "alert"?
Especially "alert" part since it triggering a lot of critical alerts!


Thanks.
Best

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