Memory Leak Investigation

I suspect a memory leak in my [language] application.

Symptoms:
- [Memory growth pattern]
- [When it becomes noticeable]
- [Any crashes or slowdowns]

Application type: [web server, desktop app, CLI tool, etc.]

Suspected areas:
[Code sections you think might be responsible]

I'm using these tools/techniques so far:
[Profilers, monitoring, etc.]

Please help me:
1. Confirm if this is likely a memory leak
2. Suggest investigation strategies
3. Identify common patterns that cause this in [language]