lock-contention

Predictive lock-contention monitoring for Postgres. Scores blocking backends by risk before they cascade, using a background worker in pgrx/Rust.

jfrq: ask a Java Flight Recorder recording why a thread stalled, who held the lock, what allocates, and what the JVM warned about. A verdict with its evidence, in text, HTML or JSON.

Interactive simulator for lock contention, serialized critical sections, and hidden wait time.

Example code for the HappyCoders article “Java Flight Recorder (JFR)” – an order-processing program with five built-in performance problems, recorded with JFR and analyzed with jfr view, jfr print, and jcmd

matrix-compute-gate is a deterministic local transaction gateway controlling access to physical RAM/VRAM compute slots. It manages a rolling 10-day flat-file ledger over a Tailscale mesh tunnel, calculating non-linear telemetry pipeline latency spikes and garbage collection lock contentions entirely offline in local memory lanes.

Catch Active Record transactions napping—detect non-database idle gaps while locks may be held.