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Minor correction needed to details on the automatic CPU profiler #22757

@smcvey

Description

@smcvey

Affected page: https://www.cockroachlabs.com/docs/stable/automatic-cpu-profiler#high-water-mark-threshold

What needs changed:

At time2, the 20m0s interval after time0, the high-water mark threshold is reset to the baseline threshold of 65.

Needs to be changed to this line:

At time2, the 20m0s interval after time1, the high-water mark threshold is reset to the baseline threshold of 65.

Reasoning:

The interval period always resets after each new CPU profile, so we count the 20 minutes from time1 in this example - we do NOT count from when the first CPU profile was taken.

Confirmation:

Confirmed by the Observability team and by the code in https://github.com/cockroachdb/cockroach/blob/74a9fdc34d97afc902379f73f017e028531ae841/pkg/server/profiler/profiler_common.go#L113

Jira issue: DOC-16188

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