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authorKim Alvefur <zash@zash.se>2021-06-08 00:58:27 +0200
committerKim Alvefur <zash@zash.se>2021-06-08 00:58:27 +0200
commit4abc78fb2f0df4eb60fa62b8b7d79a7c361646d7 (patch)
tree6729b5cde52dc7b347dde627c6de7fb4d9329012
parentaf9aa9349adc5d934da5231b157d51568512eb12 (diff)
downloadprosody-4abc78fb2f0df4eb60fa62b8b7d79a7c361646d7.tar.gz
prosody-4abc78fb2f0df4eb60fa62b8b7d79a7c361646d7.zip
util.openmetrics: Prettify format of histogram buckets
"%g" turns 1GB into 1.07374e+09, which is a bit awkward for the bytes measurements IMO. Turning up the precision, at "%.17g" turns 0.1 into 0.10000000000000001 while "%0.16" gives 0.1, hiding most of those pesky floating point artefacts. Lua version 5.2 uses "%.14g" ( see LUA_NUMBER_FMT in luaconf.h.html ) so it seems like a sensible choice here.
-rw-r--r--util/openmetrics.lua2
1 files changed, 1 insertions, 1 deletions
diff --git a/util/openmetrics.lua b/util/openmetrics.lua
index 299b36c7..90d3fdc2 100644
--- a/util/openmetrics.lua
+++ b/util/openmetrics.lua
@@ -58,7 +58,7 @@ local function render_histogram_le(v)
return "+Inf"
end
- return string.format("%g", v)
+ return string.format("%.14g", v)
end
-- BEGIN of generic MetricFamily implementation