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| author | Kim Alvefur <zash@zash.se> | 2021-06-08 00:58:27 +0200 |
|---|---|---|
| committer | Kim Alvefur <zash@zash.se> | 2021-06-08 00:58:27 +0200 |
| commit | 4abc78fb2f0df4eb60fa62b8b7d79a7c361646d7 (patch) | |
| tree | 6729b5cde52dc7b347dde627c6de7fb4d9329012 /util/openmetrics.lua | |
| parent | af9aa9349adc5d934da5231b157d51568512eb12 (diff) | |
| download | prosody-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.
Diffstat (limited to 'util/openmetrics.lua')
| -rw-r--r-- | util/openmetrics.lua | 2 |
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 |