Skip to content

README.md

Latest commit

 

History

History
247 lines (164 loc) · 4.01 KB

README.md

File metadata and controls

247 lines (164 loc) · 4.01 KB
Raw

spring-redis-performance

Redis Cache-aside: Student GET 85ms DB → 2ms Redis | Java 17 + Spring Boot 2.6.6

Backend service proving Redis caching with measurable performance gains.

🚀 Tech Stack

Layer Technology
Backend Java 17, Spring Boot 2.6.6, Spring Web, Spring Data JPA
Cache Redis with Jackson JSON + @Cacheable
Database H2 in-memory for dev/testing
Ops Docker Compose, Timing logs, Spring Boot Actuator

⚡ Performance Proof

Before Redis: Student GET 85ms DB query After Redis: Student GET 2ms cache hit

Speedup: 42.5x faster with @Cacheable on service layer

Proof method: System.currentTimeMillis logs in console

🛠️ Redis Implementation

@Cacheable(value = "student-cache", key = "#id")
@Transactional(readOnly = true)
public Student getstudentById(Long id) {

    long start = System.currentTimeMillis();

    Student student = studentRepository.findById(id).orElse(null);

    System.out.println(
        "DB hit for ID " + id + ": "
        + (System.currentTimeMillis() - start)
        + "ms"
    );

    return student;
}

📊 Monitoring with Spring Boot Actuator

Spring Boot Actuator was used for application monitoring and observability.

Monitoring endpoint:

/actuator/metrics/http.server.requests?tag=uri:/student/students

Collected metrics:

  • HTTP request count
  • Total processing time
  • Maximum latency
  • HTTP methods
  • URI performance
  • HTTP status codes

Example monitoring result:

COUNT: 5015 requests
TOTAL_TIME: 16.48 seconds
MAX: 0.026 seconds

Actuator Metrics Screenshot

Add screenshot:

docs/screenshots/actuator-http-server-requests.png

🧪 Load Testing

ApacheBench (ab) was used to test the student endpoint under concurrent load.

Command:

ab -n 5000 -c 100 https://<application-url>/student/students

Test Configuration

Parameter Result
Total Requests 5000
Concurrent Users 100
Failed Requests 0

Results

Metric Value
Requests per second 82.68
Average request time 1209 ms
50% requests completed within 595 ms
Maximum request time 9900 ms

ApacheBench Load Test Screenshot

Add screenshot:

docs/screenshots/load-test-apachebench.png

🔎 API Verification

Student endpoint successfully tested:

GET:

/student/students

Response:

[
  {
    "id": 1,
    "studentName": "John Doe",
    "email": "john@test.com",
    "regDate": "2026-07-18",
    "courseName": "Computer Science"
  }
]

Student API Response Screenshot

Add screenshot:

docs/screenshots/student-api-response.png

🏗️ Run Locally

docker compose up -d
mvn spring-boot:run

Application:

http://localhost:8080

🔜 Remaining Work

  • Add Redis cache load test comparison
  • Compare database performance vs Redis cache hits
  • Add JVM and memory Actuator metrics
  • Add Prometheus/Grafana dashboard (if required)
  • Add final performance comparison screenshots

📸 Evidence Screenshots

Required screenshots:

1. Actuator Monitoring

Browser URL:

/actuator/metrics/http.server.requests?tag=uri:/student/students

File:

actuator-http-server-requests.png

2. Student API Response

Browser URL:

/student/students

File:

student-api-response.png

3. ApacheBench Load Test

Codespace terminal showing:

ab -n 5000 -c 100 ...
Requests per second: 82.68
Failed requests: 0

File:

load-test-apachebench.png

Commit Changes

git add README.md docs/screenshots

git commit -m "Add actuator monitoring and load testing evidence"

git push