Александр Спирин
Александр Спирин Лига Цифровой Экономики
Кирилл Калистратов
Кирилл Калистратов InCountry
17:30 04 February
22 мин

PostgreSQL Citus vs MongoDB sharded

We would like to share our test results (including performance testing) of PostgreSQL/Citrus and MongoDB for our company's data. It has been a very exciting process with unexpected turns and a somewhat controversial outcome.



Другие доклады

  • Jose Cores Finotto
    Jose Cores Finotto Gitlab Inc
    45 мин

    Managing PostgreSQL at Gitlab.com

    I would like to present the main projects for the evolution of our database, how we execute the administration, the problems and pitfalls we found, and how we solve them,the number and how are the database clusters from Gitlab.com , and what is our planning for the future, sharding, kubernetes... Our environment is in an exponential growth, with millions of users and thousands of requests per second, and we keep our platform stable and scaling. Join our session and discover our how we are doing it!

  • Ivan Frolkov
    Ivan Frolkov Postgres Professional
    45 мин

    Transaction Isolation Levels in PostgreSQL

    Everyone has heard something about transaction isolation levels, but oddly enough, almost no one can clearly explain what it is any why it is important. At the same time, for many operations, it is critical to have a clear understanding of isolation levels and how they can affect the result. Indeed, if a customer has been paid twice and the developer has to pay back the losses, it won't seem unimportant. We'll discuss how to avoid such unpleasant situations.

  • Andrey Zubkov
    Andrey Zubkov ООО "Пармалогика"
    22 мин

    Using a GiST index in solution of custom search problem

    I'll show an example of solving the problem of searching "similar" texts for one given text in big array using GiST index. The problem itself is not much important, but it is easy to understand. Using this problem as example, I'll show one of many methods of adapting GiST index for custom search problems. Maybe this talk will help you to solve other search problems.

  • Andrey Zubkov
    Andrey Zubkov ООО "Пармалогика"
    45 мин

    An easy tool for historical workload analysis in Postgres database - pg_profile

    Any DBA needs some kind of tool for historical workload analyse. Assume once at morning your monitoring team will report of sudden performance degradation at 2-3 a.m., and now you need to investigate this issue. What activities was most resource consuming within that hour? There are several tools for solving this problem, and I'll talk about one very easy and convenient tool - pg_profile. It need only a postgres database and a cron-like tool to run, and it will generate a workload profile report for your database as you need it. Ths report will be a good start point for further investigation.