In late September to early October of 2023, my friend Vivian and I embarked on a memorable journey through Central Japan. This article details our adventures, offering insights for those planning to show foreign friends around or anyone considering a visit to Central Japan. Kusatsu Onsen 草津温泉 Mt. Chougatake 蝶ヶ岳 Suwa Gokura 諏訪五蔵 Chirihama Nagisa Driveway 千里浜なぎさドライブウェイ Kanazawa Castle Park 金沢城公園
I had a chance to learn about the concept called the “xmin horizon” in Postgres, so I’m leaving a learning memo. The xmin horizon is also called the oldest xmin, and it tells you “until which point (in terms of transactions) the vacuum process can clean up dead rows”. In other words, VACUUM can’t clean up dead rows after this xmin horizon. When you see a log…
In May 2017, I received my Green Card (the US Permanent Residency Card). This was a long journey and it took about 2 years, so I’d like to explain how I got one and what the journey was like.
While the Heroku Postgres team were trying to close “the follower hole”, we discovered “phantom WAL1 segments”. This was causing recovering standbys that were trying to replay that segment to crash or enter a retry loop. In this article, I’m going to explain what the follower hole is, what the phantom WAL segment is, and how we tackled it. The phantom WAL segment is a…
Early October, I had a chance to give a talk at Grailed, with a title “Healthy Database”, about Heroku Postgres and databases in general to their engineers and friends (thanks for having me, Grailed!). Grailed is a curated community marketplace for men’s clothing. They’re an NYC based company, have a very nice office and super nice people. They recently launched Heroine,…
Last month or so, I finally decided to write a blog post. It’s been a while since I wrote one. Basically I stopped writing something after I joined Heroku. I’ve learned many things last 5 years (well that’s the last time I wrote a blog post, seems like), and I’ve also experienced many things. Thanks to the technology and community, seems like blogging systems improved a…
I went to Chartio‘s new office space (really modan & cool, I loved it!) and launch party! Thank you for inviting me to this event, Melissa! Melissa is a wonderful lady who is working at Chartio as PR. I would love to introduce their office and product for Japanese people. Sorry for non-Japanese speakers, this blog post is written in Japanese. 友達のMelissaに招待され、Chartioの新オフィスお披露目&サービス一般公開パーティに行ってきました!…
これぞサンフランシスコの醍醐味!とも言えるBay To Breakersを見てきました。去年も見に行ったので、1年以上サンフランシスコに住んでるなぁと実感する1日でもありました。 Bay To Breakersは、サンフランシスコの東から西まで12kmを横断するマラソン大会です。もちろんガチで走っている人もいる(らしい)のですが、なにせ7時スタートなので私が見に行く頃にはもうガチで走っている人はゼロです。みんな歩くor早歩きです。それよりメインは仮装です!ということで、私の見つけたおもしろい仮装を紹介したいと思います。他にもおもしろい仮装はいっぱいあったんですが、カメラが間に合いませんでした。 左上:レインボーフラッグの仮装です。とってもかわいかったです!しかも、これ「いったい何着発注したんだ…」ってくらい多くの人が着ていました。見つけた限りでも30人以上は着ていたと思います。…