Reddit Tech VN BotJan 22

Người dùng đã phát triển biểu đồ độ sâu thị trường cho Grafana – thứ mà đội ngũ Grafana không tạo trong hơn 3 năm dù nhu cầu từ 2022. Giải pháp sử dụng Plotly với mã nguồn mở trên GitHub, giúp theo dõi order book theo thời gian thực. Dễ tích hợp với QuestDB cho xử lý dữ liệu hiệu suất cao.
#Grafana #MarketDepth #Plotly #QuestDB #JavaScript #ThịTrườngTàiChính #ĐộSâuThịTrường #DataVisualization #ThịTrường #BiểuĐồ

https://www.reddit.com/r/programming/comments/1qk1qwi/building_the_market_depth_ch

Hacker NewsJan 13

A 40-Line Fix Eliminated a 400x Performance Gap

https://questdb.com/blog/jvm-current-thread-user-time/

#HackerNews #40LineFix #PerformanceOptimization #JVM #QuestDB #HackerNews

How a 40-Line Fix Eliminated a 400x Performance Gap | QuestDB

A deep dive into an OpenJDK commit that replaced slow /proc file parsing with a single syscall, revealing obscure Linux kernel internals and a 20-year-old optimization opportunity.

QuestDB
N-gated Hacker NewsDec 15
Ah, the classic saga of a techie who thinks their personal Linux odyssey is as gripping as a Netflix series. 🤦‍♂️ Somehow, in 2025, we're still pretending a frozen machine is a kernel bug's fault and not just an excuse to name-drop the "ultralow latency" #QuestDB. 🚀 Spoiler alert: the real #deadlock is between this writer's ego and reality. 🐢💥
https://questdb.com/blog/async-profiler-kernel-bug/ #techhumor #LinuxDrama #egoVsReality #HackerNews #ngated
How a Kernel Bug Froze My Machine: Debugging an Async-profiler Deadlock | QuestDB

How I investigated and worked around a kernel bug that caused async-profiler to freeze my machine whenever I tried to use a profiler.

QuestDB
Hacker NewsDec 15

A Kernel Bug Froze My Machine: Debugging an Async-Profiler Deadlock

https://questdb.com/blog/async-profiler-kernel-bug/

#HackerNews #KernelBug #AsyncProfiler #Deadlock #Debugging #TechBlog #QuestDB

How a Kernel Bug Froze My Machine: Debugging an Async-profiler Deadlock | QuestDB

How I investigated and worked around a kernel bug that caused async-profiler to freeze my machine whenever I tried to use a profiler.

QuestDB
N-gated Hacker NewsSep 23
Oh, look! Another riveting tale of a developer's tedious journey down the rabbit hole of #Rust and #compilers 🐇🔧. Because clearly, nothing screams "exciting read" like learning how an awkward job interview spiraled into a deep dive on #fetchmax and #concurrency 🤦‍♂️. If you've ever wanted a timeseries database to match your existential dread, QuestDB's got you covered! 📉📚
https://questdb.com/blog/rust-fetch-max-compiler-journey/ #developerjourney #QuestDB #HackerNews #ngated
From Rust to Reality: The Hidden Journey of fetch_max | QuestDB

A compiler deep-dive tracing Rust’s AtomicU64::fetch_max from macro expansion and rustc intrinsics through LLVM’s atomicrmw umax and AtomicExpandPass to the final x86-64 CAS loop

QuestDB
OS-SCIJul 24, 2025
#QuestDB 9.0 is out! This high-performance, #opensource #timeseries #database now supports multi-dimensional arrays and a new binary line protocol for better throughput. Enhance your skills with OS-SCi's specialized courses at https://os-sci.com and https://os-sci.nl. https://www.phoronix.com/news/QuestDB-9.0
Neustradamus :xmpp: :linux:Jul 13, 2025
#QuestDB 9.0.0 has been released (#SQL / #TimeSeriesDBMS / #InfluxDB / #eXtremeDB / #MongoDB / #TimescaleDB / #DBMS / #RDBMS / #Database / #DB) https://questdb.io/
QuestDB | Next-generation time-series database

QuestDB is the world's fastest growing time-series database. Engineered for demanding workloads—from trading floors to stock exchanges—it delivers ultra-low latency, high ingestion throughput, and a multi-tier storage engine. Native support for open formats keeps your data portable and free from vendor lock-in.

QuestDB
Nicolas Fränkel 🇪🇺🇺🇦🇬🇪Jun 28, 2025

Unorthodox #Java: Building #QuestDB by my friend (and former boss) @jerrinot

https://bjug.jerrinot.info/

Unorthodox Java: Building QuestDB

 Qiita - 人気の記事Aug 5, 2024

Ubuntu22.04にQuestdbを入れてinfluxDBと比較してみた。
https://qiita.com/nw-engineer/items/10224376ffb0917dc7f2?utm_campaign=popular_items&utm_medium=feed&utm_source=popular_items

#qiita #ESXi #java17 #Ubuntu22_04 #questdb

Ubuntu22.04にQuestdbを入れてinfluxDBと比較してみた。 - Qiita

QuestDBは、高スループットの取り込みと高速SQLクエリを実現するオープンソースの時系列データベースという事らしく、influxDBよりも高速に動作するという話なので両者の性能差を比較してみたい…

Qiita
Neustradamus :xmpp: :linux:Jun 23, 2024
#QuestDB 8.0.1 has been released (#SQL / #TimeSeriesDBMS / #InfluxDB / #eXtremeDB / #MongoDB / #TimescaleDB / #DBMS / #RDBMS / #Database / #DB) https://questdb.io/
QuestDB | High performance time series database

QuestDB is a fast columnar database that solves ingestion speed bottlenecks. Superior developer experience with SQL and native time series extensions. Open source, self-hosted enterprise or fully managed.