Limiter: avoid stop-the-world pause when reading heap size #10325
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Use a Go metric instead of calling `runtime.ReadMemStats`. Empirically this is much faster. Signed-off-by: Bryan Boreham <[email protected]>
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What this PR does
Use a Go metric instead of calling
runtime.ReadMemStats. Empirically this is much faster.In a trace from a large ingester; the stop-the-world pause was more like 1-5ms; see example in image.
(and this is called every 1 second)
Checklist
CHANGELOG.mdupdated - the order of entries should be[CHANGE],[FEATURE],[ENHANCEMENT],[BUGFIX].about-versioning.mdupdated with experimental features.