Timechart
Timecharts allow you to see the change in metric value over time. The amount of data visualized on a graph is dependent on the time selection selected within the Dashboard. You can aggregate metrics from multiple sources into a single line, or graph a line per combination of segment labels.
Time aggregation: For example, the average value of sysdig_host_cpu_used_percent
metric is computed for each entity over 1 hour at 1-minute intervals.
Group Rollup: For each host_hostName
the values from time
aggregation are averaged over the scope and the top 10 segments are
shown on the chart.
For information on configuring a chart, see Create a New Panel.
Types of Timecharts
Type | Preview |
---|---|
Line | |
Stacked Area | |
Stacked Bars |
Timechart look and feel can be configured under Display settings when configuring a panel.
When to Use
Type | Use case |
---|---|
Line | When quickly identifying outlier segments is important. When plotting a single metric over time. |
Stacked Area | When an aggregate view of segments is needed. |
Stacked Bars | When metrics are sometimes reporting zero. |
Sampling
PromQL-based panels and Form-based panels follow different rules when it comes to choosing which data sampling to use when displaying time series.
PromQL-Based Panels
PromQL-based panels dynamically choose the appropriate sampling that satisfies an upper limit of 360 data points per query. For a 10-second granular metric such as sysdig_container_cpu_used_percent
, the below table can be used as a reference.
Time Interval | Sampling used | Number of data points displayed |
---|---|---|
10 minutes | 10 seconds | 60 data points |
20 minutes | 10 seconds | 120 data points |
30 minutes | 10 seconds | 180 data points |
40 minutes | 10 seconds | 240 data points |
90 minutes | 10 seconds | 360 data points |
180 minutes | 1 minute | 90 data points |
1 day | 10 minutes | 240 data points |
2 weeks | 1 day | 14 data points |
Form-Based Panels
Form-based panels follow a static rule when choosing the sampling to use per query.
Time Interval | Sampling used |
---|---|
< 20 minutes | 10 seconds |
< 2 hours | 1 minute |
< 1 day | 10 minutes |
< 14 days | 1 hour |
>= 14 days | 1 days |
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