[hotfix][docs] Update currentInputNWatermark metrics docs including N…

…-ary operator
zhengcanbin · Jul 30, 2020 · bb66409 · bb66409
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diff --git a/docs/monitoring/metrics.md b/docs/monitoring/metrics.md
@@ -1471,19 +1471,11 @@ Certain RocksDB native metrics are available but disabled by default, you can fi
       <td>Gauge</td>
     </tr>
     <tr>
-      <th rowspan="4"><strong>Operator</strong></th>
-      <td>currentInput1Watermark</td>
+      <th rowspan="3"><strong>Operator</strong></th>
+      <td>currentInput<strong>N</strong>Watermark</td>
       <td>
-        The last watermark this operator has received in its first input (in milliseconds).
-        <p><strong>Note:</strong> Only for operators with 2 inputs.</p>
-      </td>
-      <td>Gauge</td>
-    </tr>
-    <tr>
-      <td>currentInput2Watermark</td>
-      <td>
-        The last watermark this operator has received in its second input (in milliseconds).
-        <p><strong>Note:</strong> Only for operators with 2 inputs.</p>
+        The last watermark this operator has received in its <strong>N'th</strong> input (in milliseconds), with index <strong>N</strong> starting from 1. For example currentInput<strong>1</strong>Watermark, currentInput<strong>2</strong>Watermark, ...
+        <p><strong>Note:</strong> Only for operators with 2 or more inputs.</p>
       </td>
       <td>Gauge</td>
     </tr>

diff --git a/docs/monitoring/metrics.zh.md b/docs/monitoring/metrics.zh.md
@@ -1470,19 +1470,11 @@ Certain RocksDB native metrics are available but disabled by default, you can fi
       <td>Gauge</td>
     </tr>
     <tr>
-      <th rowspan="4"><strong>Operator</strong></th>
-      <td>currentInput1Watermark</td>
+      <th rowspan="3"><strong>Operator</strong></th>
+      <td>currentInput<strong>N</strong>Watermark</td>
       <td>
-        The last watermark this operator has received in its first input (in milliseconds).
-        <p><strong>Note:</strong> Only for operators with 2 inputs.</p>
-      </td>
-      <td>Gauge</td>
-    </tr>
-    <tr>
-      <td>currentInput2Watermark</td>
-      <td>
-        The last watermark this operator has received in its second input (in milliseconds).
-        <p><strong>Note:</strong> Only for operators with 2 inputs.</p>
+        The last watermark this operator has received in its <strong>N'th</strong> input (in milliseconds), with index <strong>N</strong> starting from 1. For example currentInput<strong>1</strong>Watermark, currentInput<strong>2</strong>Watermark, ...
+        <p><strong>Note:</strong> Only for operators with 2 or more inputs.</p>
       </td>
       <td>Gauge</td>
     </tr>