Metrics and measurement units
What does the dot mean?
It separates integer and fractional parts of a number. For example, the 123,456 means 123 and 456 thousandths.
Why does cpu_usage exceed 100%?
You're using a VM with guaranteed vCPU performance under 100%. For example, a VM guarantees you 20% of vCPU performance. The monitoring system considers this value as 100% of the expected load. If you are the only one using a physical core, your VM can use up to 100% of vCPU, which is 5 times higher than guaranteed vCPU performance. In this case, the chart can show values as high as 500%.
If the charts indicate that the 100% upper limit is exceeded consistently, we recommend increasing the guaranteed vCPU performance. At any time, concurrent activities on the physical core can reduce the actual vCPU usage to guaranteed 20%, i.e., about 400 MHz for Intel Cascade Lake.
Where can I find DB metric descriptions?
Metrics are described in our service guides, such as:
- Yandex Managed Service for PostgreSQL.
- Yandex Managed Service for MySQL®.
- Yandex Managed Service for Valkey™.
You can see the most important metrics on a service dashboard. If you need a list of all service metrics, navigate to Metrics. To export a full list of metrics, follow this guide.
How can I configure chart measurement units?
You can set up measurement units in the Axes chart configuration tab. There you can select the measurement unit type, specify the number format, choose a linear or logarithmic scale, and set the maximum and minimum values.
How the maximum (peak) values are displayed on a chart?
When creating a point, Monitoring averages metric values received for a certain period of time. As you shorten the time scale, the sample size grows, leading to higher peak chart values.
The opposite is also true; if you expand the time scale, peaks are averaged out and may not show up on the chart.
The chart is missing or looks cut off. Why?
The data may lie beyond the chart scale. Check the chart scale and its maximum and minimum values in the Axes tab.
Does query language contain function descriptions?
You can find function descriptions in the Reference.
You can test the functions in the Metrics section.