agent/goalcu: implement ZoneLoadAverage #1148
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Signed-off-by: Oleg Vasilev <[email protected]>
Signed-off-by: Oleg Vasilev <[email protected]>
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Signed-off-by: Oleg Vasilev <[email protected]>
Signed-off-by: Oleg Vasilev <[email protected]>
sharnoff
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Nov 26, 2024
Co-authored-by: Em Sharnoff <[email protected]>
Signed-off-by: Oleg Vasilev <[email protected]>
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ZoneLoadAverage compares abs(load1 - load5) against two thresholds, to determine if compute is in one of 3 zones:
The thresholds are computed as a percentage of a load5, the percentage is set by two new values:
cpuStableZoneRatioandcpuMixedZoneRatio.For example, for the
cpuStableZoneRatio = 0.25,cpuMixedZoneRatio = 0.25andload5 = 8, we'd get:abs(load5 - load1) < 2<=>6 < load1 < 102 < abs(load5 - load1) < 4<=>4 < load1 < 6or10 < load1 < 12.Similar algorithm is described in https://www.notion.so/neondatabase/RFC-SwitchLoadAverage-13ef189e0047804f9297e8772739508e?pvs=4
Fixes #729