async-profiler
Jailer
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| async-profiler | Jailer | |
|---|---|---|
| 10 | 217 | |
| 7,112 | 2,705 | |
| 2.8% | - | |
| 8.7 | 9.6 | |
| 11 days ago | 5 days ago | |
| C++ | Java | |
| Apache License 2.0 | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
async-profiler
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JVM Profiling in Action
We'll use async-profiler and flame graphs for profiling. To simplify the process, we'll run the code using JBang.
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The Return of the Frame Pointers
JIT'ed code is sadly poorly supported, but LLVM has had great hooks for noting each method that is produced and its address. So you can build a simple mixed-mode unwinder, pretty easily, but mostly in process.
I think Intel's DNN things dump their info out to some common file that perf can read instead, but because the *kernels* themselves reuse rbp throughout oneDNN, it's totally useless.
Finally, can any JVM folks explain this claim about DWARF info from the article:
> Doesn't exist for JIT'd runtimes like the Java JVM
that just sounds surprising to me. Is it off by default or literally not available? (Google searches have mostly pointed to people wanting to include the JNI/C side of a JVM stack, like https://github.com/async-profiler/async-profiler/issues/215).
- FLaNK Stack 29 Jan 2024
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Tracking Java Native Memory with JDK Flight Recorder
debugging native calls in itself is also painful. I have switched to using async-profiler (https://github.com/async-profiler/async-profiler) instead of JFR for most of my usecases.
A. it tracks native calls by default
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Show HN: Javaflame – Simple Flamegraph for your Java application
https://github.com/async-profiler/async-profiler#flame-graph...
Ok, Windows is not supported. But IntelliJ made a fork which works on Windows.
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Lettuce (Redis) + Mybatis (MySQL) take up most of the CPU in production - Is it normal? Did you observe that in your environment? Any ways to optimize it?
Hi, today I used async-profiler to check the CPU usage of my Spring Boot app (just a normal backend) in production. Surprisingly, Lettuce (Redis) + Mybatis (MySQL) take up most of the CPU time. I am not talking about wall time here, but CPU time, since I know database requests need to wait for milliseconds and thus wall time will be very long. Therefore, I wonder:
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A question about Http4s new major version
You can use async-profiler to see what is happening under the hood.
- Reducing code size in (Rust) librsvg by removing an unnecessary generic struct
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what is your favorite programming trick/tool that not many People know about?
I have used visual vm quite a bit. https://github.com/async-profiler/async-profiler is also amazing... Throw the binary on the system and fire it up. It also profiles down into native code as well if you do that kind of thing.
Jailer
- Show HN: Jailer is a unique open-source database client tool
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DBeaver – open-source Database client
Some other tools I have also enjoyed:
DBVisualizer: https://www.dbvis.com/ (for exploring the schema)
Jailer: https://wisser.github.io/Jailer/ (for data browsing)
Aside from that, it's usually just been a mix of using specialized tools like MySQL Workbench, SQL Developer, pgAdmin and others, or something that tries to do it all like DataGrip.
Didn't actually find anything particularly amazing about DataGrip, but if I'm paying for the JetBrains Ultimate subscription, might as well use it because it's pretty okay.
- Database browsing tool with sophisticated and animated Java Swing UI
- Jailer is a unique open-source database client tool
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Why people care about PostGIS and Postgres
I also found DBeaver to be a huge improvement over tools I used earlier.
Recently I discovered Jailer which makes it very easy to navigate complex relational structures: https://github.com/Wisser/Jailer
- Jailer, a unique open-source database tool
- Jailer is a unique open-source database tool
- FLaNK Stack Weekly for 14 Aug 2023
- UniversalProblemSolver
- Jailer: Database Subsetting and Relational Data Browsing Tool.
What are some alternatives?
jmh - https://openjdk.org/projects/code-tools/jmh
dbgate - Database manager for MySQL, PostgreSQL, SQL Server, MongoDB, SQLite and others. Runs under Windows, Linux, Mac or as web application
container-jfr - Secure JDK Flight Recorder management for containerized JVMs
Replibyte - Seed your development database with real data ⚡️
jfr-libraries - a list of libraries that generate JFR events
beekeeper-studio - Modern and easy to use SQL client for MySQL, Postgres, SQLite, SQL Server, and more. Linux, MacOS, and Windows.
Arthas - Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas
Ebean ORM - Ebean ORM
opentelemetry-java-instrumentation - OpenTelemetry auto-instrumentation and instrumentation libraries for Java
H2 - H2 is an embeddable RDBMS written in Java.
junit-jfr - a JUnit 5 extension that generates JFR events
presto - Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io) [Moved to: https://github.com/trinodb/trino]