ferd/vmstats

This system is a configurable Erlang application for collecting and transmitting virtual machine statistics. It decouples metric collection from specific backends by allowing users to define custom sink modules, replacing the previous hardcoded dependency on StatsD. The application tracks various VM metrics such as port counts, atom counts, and scheduler wall time, with support for configurable intervals and optional feature toggles.

The vmstats application no longer hardcodes the StatsD client (statsderl) for sending metrics. Instead, it accepts a configurable 'sink' module that implements the new vmstats\_sink behavior, allowing users to integrate with any metrics backend. This change also introduces several new metrics (port counts, atom counts, messages in queues, scheduler wall time ratios, and incremental IO/GC stats), makes scheduler wall time collection optional, and renames the configuration key 'delay' to 'interval'.

src · high confidence

The vmstats application no longer relies on the statsderl library for sending metrics. Instead, it introduces a configurable \vmstats\_sink\ behavior, allowing users to define custom modules to handle metric collection and transmission. This change also updates the build configuration to use rebar3 directly, removing the embedded rebar and the legacy Makefile, and adds a new LICENSE file.

(repo-wide) · high confidence

The test suite was updated to reflect internal refactoring: the mock sink module was renamed from statsderl to sample\_sink and now implements the vmstats\_sink behavior, and the vmstats\_server\_tests were rewritten to use a setup/teardown pattern with configurable environment variables (interval, key\_separator, sched\_time, memory\_metrics) instead of hard-coded assertions.

test · high confidence

Written by watchdog.canine.dev from the codebase's own history, inside the signed delivery this page is composed from.

• CAI 58 → 56 (-1.9)
• Rubric changed (rubric-2026.09.12 → rubric-2026.09.18) — scores are not directly comparable.

• Code Health 100 → 100 (+0.0)
• Architecture 69 → 69 (+0.0)
• Maturity 36 → 31 (-4.9)
• Readiness 74 → 77 (+2.7)
• Security 100 → 100 (+0.0)

• Coverage not measured — no coverage collector is wired up

Written by watchdog.canine.dev from the codebase's own history, inside the signed delivery this page is composed from.

ferd/vmstats was measured the same way every project in this corpus was: the same rubric, at a pinned commit, with the result published in full. Point a surveyor at a repository you know and see whether you agree with it.