Category: Distributed Database

March 27, 2022

Hibernate Oracle sessions not be closed correctly

We got escalation today, a lot of services are very slow or stop working. Our Oracle database(10g) admin has found that there are a huge number of unclosed sessions in the Oracle database. In...

MySQL Theory & Solution / Postgres

September 15, 2018

[Repost]Why Uber Engineering Switched from Postgres to MySQL

1. Introduction The early architecture of Uber consisted of a monolithic backend application written in Python that used Postgres for data persistence. Since that time, the architecture of Uber has changed significantly, to a model of microservices and...

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Category: Distributed Database

Hibernate Oracle sessions not be closed correctly

[Repost]Why Uber Engineering Switched from Postgres to MySQL

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