Jan Nidzwetzki

pg-lock-tracer. An eBPF based lock tracer for PostgreSQL

crypto-bot. This repository contains a crypto currency trading bot. The bot implements some strategies (donchian, ema, atr) and works on the Bitfinex crypto currency exchange.

bitfinex-v2-wss-api-java. This project provides a Java client library for the Bitfinex WebSocket API (v2). Public and private channels (candles, ticks, executed trades, (raw) orderbooks, orders, and wallets) are implemented.

bboxdb. BBoxDB is a scalable, highly available, and distributed data store for multi-dimensional big data. The software supports operations like multi-dimensional range queries and spatial joins. In addition, data streams are supported.

pg-dev-container. Visual Studio Code - Development Container - PostgreSQL

pg_plan_alternatives. An eBPF based query planning tracer for PostgreSQL

mysql-ha-cloud. This container image provides a highly available and replicated MySQL installation in Kubernetes or Docker Swarm. Consul, ProxySQL, and XtraBackup are used for leader election, load distribution, and backups.

planexplorer. Plan Explorer is a web application for visualizing PostgreSQL query plans

spatial-index-java. Spatial indexing algorithms for java

chrootfs. chrootfs is a virtual filesystem for chroot environments. The project implements a lighweight FUSE FS overlay over a exsting filesystem.

pg_debug_scan. PostgreSQL extension to debug table scans. The extension is intended to illustrate MVCC in PostgreSQL.

postgresql-sandbox. PostgreSQL sandbox installer

ansible-playbooks. Ansible Playbooks

berlinmodplayer. BerlinMod Player is a tool that creates a stream of coordinate updates from BerlinMod data. The tool can be used to benchmark geo-spatial stream processing sytems.

saslpolicyd. Policy Daemon for Postfix. Detects the abuse of SASL accounts.

pic. This project contains some assemby code for 8-bit PIC microcontroller (e.g., a driver for seven-segment leds or a driver for a ultrasonic sensor).

sleepuntil. A program that sleeps until a certain time is reached

spatialhadoop2. The second generation of SpatialHadoop that ships as an extension

jnidzwetzki.github.io. The source code of my website

pg-conf-ger-2026. Supplemental material for my talk at PostgreSQL Conf Ger 2026