Pratik Mankawde 61b101e147 fix(nodestore): sample writer depth over one population ...

Depth was observed at insert entry but its sample was only counted at
insert exit, so an insert still in flight contributed nothing to the
mean while completed inserts -- disproportionately the fast, shallow
ones -- all did. The reported mean understated queueing exactly when
queueing was worst: with every writer inside its first insert the gauge
was omitted entirely, while writers-in-flight correctly showed them all.

Depth and its sample count are now both folded in at entry, so the mean
is taken over one population. Mean depth is the L in Little's Law, so a
biased L understated the derived queueing share of each insert.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

2026-07-28 18:24:07 +01:00

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xrpl

fix(nodestore): sample writer depth over one population

2026-07-28 18:24:07 +01:00