This topic describes how to configure a horizontal bar chart to display query results.

Background information

A bar chart is a horizontal column chart that is used to analyze the top N values of fields. A bar chart is configured in a similar way to a column chart.

Each bar chart consists of the following elements:
  • X-axis (vertical)
  • Y-axis (horizontal)
  • Rectangular bar
  • Legend

Each rectangular bar has a fixed height and a variable width. The variable width indicates a value. You can use a grouped bar chart to display the data if multiple columns of data are configured for the Y-axis.

Procedure

  1. Log on to the Log Service console.
  2. In the Projects section, click the name of the project that you want to manage.
  3. Choose Log Storage > Logstores, and then click the Logstore that you want to manage.
  4. Enter a query statement in the search box, specify a time range, and then click Search & Analyze.
  5. On the Graph tab, click the Bar chart - 001 icon.
  6. On the Properties tab, configure the properties of the bar chart.
    Note
    • Bar charts can be used to display query results if less than 20 log entries are returned. You can use a LIMIT clause to control the number of rectangular bars. Analysis results may not be clearly displayed if the chart contains a large number of rectangular bars. You can use an ORDER BY clause to analyze the top N values of fields. We recommend that you map less than five columns of data to the Y-axis.
    • You can use a grouped bar chart to display query results. However, the values represented by each rectangular bar in a group must be positively or negatively associated with each other.
    Parameter Description
    X Axis The categorical data.
    Y Axis The numeric data. You can select one or more fields for the Y-axis.
    Legend The position where the legend is located in the chart. Valid values: Top, Bottom, Left, and Right.
    Format X-axis The format in which the data selected for the X-axis is displayed.
    Legend Width The width of the Legend.
    Y-axis Scale Density The scale density of the Y-axis. Valid values: 3 to 30.
    Show Values If you turn on the Show Values switch, the value of each column is displayed.
    Margin The distance between the axis and the borders of the chart. This includes the Top Margin, Bottom Margin, Left Margin, and Right Margin.

Examples

To analyze the top 10 visited request URIs (request_uri), execute the following query statement:

* | select  request_uri, count(1) as count group by request_uri order by count desc limit 10
Examples