Vlad Lazar 1ef4258f29 pageserver: add tenant level performance tracing sampling ratio (#11433) ...

## Problem

https://github.com/neondatabase/neon/pull/11140 introduces performance
tracing with OTEL
and a pageserver config which configures the sampling ratio of get page
requests.

Enabling a non-zero sampling ratio on a per region basis is too
aggressive and comes with perf
impact that isn't very well understood yet.

## Summary of changes

Add a `sampling_ratio` tenant level config which overrides the
pageserver level config.
Note that we do not cache the config and load it on every get page
request such that changes propagate
timely.

Note that I've had to remove the `SHARD_SELECTION` span to get this to
work. The tracing library doesn't
expose a neat way to drop a span if one realises it's not needed at
runtime.

Closes https://github.com/neondatabase/neon/issues/11392

2025-04-04 13:41:28 +00:00

..

src

pageserver: add tenant level performance tracing sampling ratio (#11433)

2025-04-04 13:41:28 +00:00

Cargo.toml

pageserver: optionally export perf traces in OTEL format (#11140)

2025-04-03 17:56:51 +00:00