Boost Java App Performance with MyPerf4J: High‑Throughput, Low‑Latency Monitoring

Background

As the company grew, the vertical application architecture could no longer meet product development needs; dozens of engineers working on a single project reduced development efficiency.

The company therefore pushed a service‑oriented approach, improving efficiency but introducing new challenges such as unknown service QPS, latency distribution, load balancing, and root‑cause analysis of performance issues.

To address these pains, we introduce a high‑concurrency, low‑latency Java performance monitoring and statistics tool— MyPerf4J .

Use Cases

Quickly locate performance bottlenecks in Java applications during development.

Continuously monitor performance metrics of Java applications in production.

Features

High Performance: Single‑threaded support for 10 million records per second, each record costing only 73 ns.

Non‑Intrusive: Implemented via JavaAgent, requiring no code changes.

Low Memory: Uses object reuse to minimize temporary objects and avoid GC impact.

High Precision: Measures response time in nanoseconds.

Real‑Time: Supports second‑level monitoring, minimum interval 1 second.

Monitoring Metrics

MyPerf4J collects dozens of real‑time metrics for each application.

Method

RPS, Count, Avg, Min, Max, StdDev, TP50, TP90, TP95, TP99, TP999, TP9999, TP99999, TP100

Memory

HeapInit, HeapUsed, HeapCommitted, HeapMax, NonHeapInit, NonHeapUsed, NonHeapCommitted, NonHeapMax

JVM GC

CollectCount, CollectTime

JVM Class

Total, Loaded, Unloaded

Quick Start

MyPerf4J is integrated via JavaAgent, requiring no code changes.

Download

Download and unzip

MyPerf4J-ASM.zip

.

Read the extracted

README

file.

Modify

MyPerf4J.properties

to set

app_name

,

metrics.log.xxx

, and

filter.packages.include

.

Download link: https://github.com/LinShunKang/Objects/blob/master/zips/CN/MyPerf4J-ASM-3.3.0-SNAPSHOT.zip?raw=true

Configuration

Add the following JVM startup parameters:

<code>-javaagent:/path/to/MyPerf4J-ASM.jar
-DMyPerf4JPropFile=/path/to/MyPerf4J.properties
</code>

Run

Start the application; monitoring logs are written to

/path/to/log/method_metrics.log

:

<code>MyPerf4J Method Metrics [2020-01-01 12:49:57, 2020-01-01 12:49:58]  
Method[6]                Type        Level  TimePercent  RPS  Avg(ms)  Min(ms)  Max(ms)    StdDev  Count  TP50  TP90  TP95  TP99  TP999  TP9999  
DemoServiceImpl.getId2(long)      General      Service      322.50%     6524   0.49      0      1      0.50      6524      0      1      1      1      1      1  
DemoServiceImpl.getId3(long)      General      Service      296.10%     4350   0.68      0      1      0.47      4350      1      1      1      1      1      1  
DemoServiceImpl.getId4(long)      General      Service      164.60%     2176   0.76      0      1      0.43      2176      1      1      1      1      1      1  
DemoServiceImpl.getId1(long)      General      Service        0.00%     8704   0.00      0      0      0.00      8704      0      0      0      0      0      0  
DemoDAO.getId1(long)            DynamicProxy  DAO          0.00%     2176   0.00      0      0      0.00      2176      0      0      0      0      0      0  
DemoDAO.getId2()                DynamicProxy  DAO          0.00%     2176   0.00      0      0      0.00      2176      0      0      0      0      0      0
</code>

Uninstall

Remove the two JVM parameters and restart the application.

<code>-javaagent:/path/to/MyPerf4J-ASM.jar
-DMyPerf4JPropFile=/path/to/MyPerf4J.properties
</code>

Project Repository

https://github.com/LinShunKang/MyPerf4J