datasource-proxy
HikariCP
| datasource-proxy | HikariCP | |
|---|---|---|
| 2 | 33 | |
| 652 | 19,424 | |
| 0.5% | - | |
| 7.3 | 6.2 | |
| 5 months ago | about 1 month ago | |
| Java | Java | |
| MIT License | Apache License 2.0 |
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datasource-proxy
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Integration Tests for N + 1 problem in Java
There is a cool library called datasource-proxy. It provides a convenient API to wrap javax.sql.DataSource interface with a proxy containing specific logic. For example, we can register callbacks invoked before and after query execution. What's interesting is that the library also contains out-of-the-box solution to count executed queries. We're going to alter it a bit to serve our needs.
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A Tale of Two Connection Pools
In this option, we wrap our HikariCP instance in another object. The nice thing about this option is that it can be used with any connection pooling library (not just HikariCP); but, it does require that you add an additional dependency to your project: https://github.com/jdbc-observations/datasource-proxy
HikariCP
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Java virtual threads caused a deadlock in TPC-C for PostgreSQL
Looks like HikariCP is also awaiting fixes for this https://github.com/brettwooldridge/HikariCP/pull/2055
- About Pool Sizing
- HikariCP maximumPoolSize based on AWS ECS number of tasks
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Writing to db
I have used hikari and exposed to do this in the past with postgres, although other dialects are supported.
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A Tale of Two Connection Pools
I found one suggestion from the author of HikariCP on how to address this, which I implemented and it worked. However, there are additional classes involved, and it feels a little clunky and hard to follow.
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Spring boot change password runtime
Not really, you can change some things in spring boot but doing so will typically trigger a refresh which is less reliable than restarting but still causes a large performance hit. You could probably do it with hikari if you really needed to but it's inadvisable to build your application around this mechanic.
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Help with bungeecord server
# https://github.com/brettwooldridge/HikariCP/wiki/About-Pool-Sizing
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Currently load testing a Django API I don’t get good results, Help me brainstorm this
Not familiar with Python but this thread about a Java connection pool might be interesting: https://github.com/brettwooldridge/HikariCP/wiki/About-Pool-Sizing
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Should I use diesel ORM if performance is the most important thing?
Whatever you choose, presuming your app is database heavy, I highly recommend spending time on DB schema design to make all queries as short as possible, avoid relying on transactions, and keep your connection pool tiny. For reference: https://github.com/brettwooldridge/HikariCP/wiki/About-Pool-Sizing
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Art of README
You reminded me of the HikariCP library and it’s documentation: Clear and simple with references to other libraries trying to accomplish the same thing. It is not in the closure space though.
https://github.com/brettwooldridge/HikariCP
What are some alternatives?
Hibernate - Hibernate's core Object/Relational Mapping functionality
c3p0 - a mature, highly concurrent JDBC Connection pooling library, with support for caching and reuse of PreparedStatements.
testing-n-1-problem - An example of writing tests to track N + 1 problem automatically
spring-boot-r2dbc - An example implementation of Spring Boot R2DBC REST API with PostgreSQL database.
Vibur DBCP - Vibur DBCP - concurrent and dynamic JDBC connection pool
JDBI - The Jdbi library provides convenient, idiomatic access to relational databases in Java and other JVM technologies such as Kotlin, Clojure or Scala.
Flyway - Flyway by Redgate • Database Migrations Made Easy.
jOOQ - jOOQ is the best way to write SQL in Java
Presto - The official home of the Presto distributed SQL query engine for big data
H2 - H2 is an embeddable RDBMS written in Java.
FlexyPool - FlexyPool adds metrics and failover strategies to a given Connection Pool, allowing it to resize on demand.
Apache Hive - Apache Hive