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QueryTuner

QueryTuner

QueryTuner

QueryTuner

1

An index scan is typically shown in Query Tuner as a group of four nodes in the access path graph .

在访问路径图中，一个索引扫描通常作为一组四个节点显示在 QueryTuner 上。

2

This section illustrates how the Query Tuner query annotation and access path graph can help you analyze access paths and SQL performance .

本部分说明 QueryTuner 查询注释和访问路径图如何帮助您分析访问路径和 SQL 性能。

3

4

Query Tuner provides a visualization of the processing that your data server uses to run a query .

在 QueryTuner 中可以看到您的数据服务器运行查询的处理过程。

5

Note , you can specify a threshold in the Query Tuner preferences to define how old statistics are before they are considered obsolete .

请注意，您可以在 QueryTuner 优先权中设置一个阈值，定义多旧的数据可认为过时。

6

Figure 6 is the access path graph generated by Query Tuner for the sample query in this article .

图 6 是 QueryTuner 为本文中大的查询样例生成的访问路径图。

7

You can save them for later execution , or run them directly from the Query Tuner client if you have the appropriate authority .

您可以将其保存以后执行，或者，如果您有适当权限，可以直接在 QueryTuner 客户端中运行。

8

For each table reference in the query, Query Tuner adds the following annotations

对于查询中的每个表引用，QueryTuner 会添加以下注释

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