Brad Fitzpatrick
d1cb7a2639
metrics: use SYS_OPENAT
...
New systems like arm64 don't even have SYS_OPEN.
2021-09-02 15:28:19 -07:00
Brad Fitzpatrick
99a1c74a6a
metrics: optimize CurrentFDs to not allocate on Linux
...
It was 50% of our allocs on one of our servers. (!!)
Updates #2784
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-09-02 13:28:39 -07:00
Brad Fitzpatrick
fc160f80ee
metrics: move currentFDs code to the metrics package
...
Updates #2784
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-09-02 11:14:14 -07:00
Brad Fitzpatrick
f267a7396f
metrics: add LabelMap.GetFloat
2020-07-19 12:31:12 -07:00
David Anderson
f192c05413
metrics: add a LabelMap type for variables with 1 label dimension.
...
This lets us publish sets of vars that are breakdowns along one
dimension in a format that Prometheus and Grafana natively know
how to do useful things with.
Signed-off-by: David Anderson <dave@natulte.net>
2020-03-04 13:22:50 -08:00
Brad Fitzpatrick
e371520cc5
tsweb, derp: add expvar http.Handler for Prometheus's format
...
And add some opinions.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-03-03 13:59:16 -08:00
