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app/vmselect/promql: adjust ttf calculation, so deriv(freev) for freev=m[d] could be properly calculated

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Aliaksandr Valialkin 2019-06-23 14:31:19 +03:00
parent c9cbf5351c
commit 3b3b2f1e6e
1 changed files with 1 additions and 1 deletions
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2
app/vmselect/promql/parser.go
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@ -18,7 +18,7 @@ func getDefaultWithArgExprs() []*withArgExpr {
// ttf - time to fuckup // ttf - time to fuckup
`ttf(freev) = smooth_exponential( `ttf(freev) = smooth_exponential(
clamp_max(clamp_min(freev, 0) / clamp_min(deriv(-freev), 0), 365*24*3600), clamp_max(clamp_max(-freev, 0) / clamp_max(deriv(freev), 0), 365*24*3600),
clamp_max(step()/300, 1) clamp_max(step()/300, 1)
)`, )`,