Werk #19743: Fix clipping in CPU utilization graphs when values exceed 100%
| Component | User interface | ||
| Title | Fix clipping in CPU utilization graphs when values exceed 100% | ||
| Date | May 18, 2026 | ||
| Level | Prominent Change | ||
| Class | Bug Fix | ||
| Compatibility | Compatible - no manual interaction needed | ||
| Checkmk versions & editions |
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Previously, CPU utilization graphs could cut off the upper part of the curve. The graph would appear flat at some value even though the actual CPU usage went higher - you could see the real peak listed in the "Maximum" column of the legend, but the curve on the chart never reached it.
This was especially noticeable for containers on multi-core hosts, where CPU utilization can rise to several hundred percent (a container fully using 4 CPU cores shows up as 400%).
The recorded values were always correct; only the chart was drawing the y-axis too short. With this fix, the y-axis automatically grows to cover the highest value in the time range you are looking at, so peaks are no longer hidden.
Other graphs that share the same axis-range logic (e.g. filesystem usage, swap usage, session counts) behave the same way: their y-axis now expands when values exceed the initial range instead of clipping the curve.