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Add notes for specific metrics #1938

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Update source-monitoring-metrics.md
abby-cyber committed Jul 4, 2022
commit 90babc89c59a7f5772d4afffc861f1041cda853f
2 changes: 1 addition & 1 deletion docs-2.0/reuse/source-monitoring-metrics.md
Original file line number Diff line number Diff line change
@@ -3,7 +3,7 @@
| 参数 | 说明 |
| ---------------------------------------------- | ----------------------------------------- |
| `num_active_queries` | 描述过去 5 秒活跃的查询语句数的变化数。<br> 计算公式:过去 5 秒开始执行的语句数减去过去 5 秒执行完毕的语句数。 |
| `num_active_sessions` | 描述过去 5 秒活跃的会话数的变化数。<br> 计算公式:过去 5 秒中登录的会话数减去过去 5 秒中登出的会话数。<br>例如:过去 5 秒中登录了 10 个会话数,登出了 30 个会话数,那么该指标值就是`-20`(10-30=)。 |
| `num_active_sessions` | 描述过去 5 秒活跃的会话数的变化数。<br> 计算公式:过去 5 秒中登录的会话数减去过去 5 秒中登出的会话数。<br>例如:过去 5 秒中登录了 10 个会话数,登出了 30 个会话数,那么该指标值就是`-20`(10-30)。 |
| `num_aggregate_executors` | 聚合(Aggregate)算子执行时间。 |
| `num_auth_failed_sessions_bad_username_password` | 因用户名密码错误导验证失败的会话数量。 |
| `num_auth_failed_sessions_out_of_max_allowed` | 因为超过`FLAG_OUT_OF_MAX_ALLOWED_CONNECTIONS`参数导致的验证登录的失败的 session 数量。|