Performance impact of MySQL performance-schema-instruments

Hi, there! I’m Otsuka (tom__bo), mainly responsible for MySQL operations and development of various DB administration and verification tools. In this post, I am going to write about my experiment on MySQL performance when its performance consumers, namely the performance_schema database and the innodb_metrics table of the information_schema database, are up and running.  I got to learn about the performance_schema and the INFORMATION_SCHEMA.INNODB_METRICS from a book …

Make your GitHub contributions calendar greener (featuring Armeria Sprint)!

Hi, there! Do any of you need to make lots and lots of commits to turn your GitHub contribution calendar into a pastureland? If that’s the case, I proudly present Armeria Sprint! Let me give you some ideas on what Armeria Sprint is and share reviews from our enthusiastic participants. You’ve probably come across a sprint at technical …

How AIR ARMOR checks iOS Code Signing

AIR ARMOR is a security solution of AIR; AIR is a component of the LINE GAME PLATFORM. You can refer to Seunghoon’s posting on AIR GO and APK Signing for information on the APK signature scheme. For this posting, I’ll explain about iOS code signing, one of Apple’s security mechanism. Code signing is to verify the integrity of the software code …

Introducing LINE Games analytics environment

Big data and data analysis have long been popular key words in the IT world. Nowadays, they are no longer a choice but a necessity. Everyone is piling up and digging up data to find a meaning from big data. To achieve success in this “fact-finding” process, we need an appropriate analytics environment. Today I’d like to share with you how and what LINE has built for game analysis.

Announcing the LINE API Experts for 2019

LINE API Expert is a program to recognize and award the title of “LINE API Expert” to competent engineers who have a deep understanding of the APIs provided by LINE and are influential in the developer community. LINE API experts will be offered an array of benefits as well as LINE’s support for their activities. …

VueConf TO 2018 Recap

VueConf TO is North America’s biggest Vue conference with attendees from all around the world, including Vue.js core team members, Nuxt.js, Vuetify.js and main library authors, along with expert speakers from the community. Vue is an open-source JavaScript framework for building user interfaces and single-page applications, which lower the barrier and complexity of frontend development. It’s one of the most popular framework nowadays …

Thank you for contributing to Armeria!

Hello to the readers! I’d like to share with you the first ever Armeria Contributor Reward Event and how it went. For this posting, I’m not going to elaborate on the technical aspects of Armeria. To learn more about its technology and features, please visit the official website for Armeria. The Armeria project was initially developed by LINE but …

Troubleshooting Data Engineering Software

Hello, I’m Keiji Yoshida. I currently work as a data engineer at LINE Data Labs. In this posting, I’d like to share a few cases on data engineering software troubleshooting: Apache Hadoop YARN ResourceManager failover Apache Hadoop HDFS NameNode failover Apache Zeppelin Notebook scheduler issue Apache Zeppelin deadlock issue Apache Spark SQL performance issue Troubleshooting failover issue in Apache Hadoop …