Backend Performance Rescue Kit — Find and Fix the 20 Bottlenecks Killing Your App

Most performance guides are written by people who benchmark toy apps.

This one is written for people who:

• get paged at 3 AM
• have SLAs
• and can’t afford to “experiment in production”

This kit walks through 20 real performance killers in backend systems and shows you:

• How they manifest in metrics and logs
• Why they happen
• How to confirm they are actually your problem
• How to fix them safely

You’ll learn how to recognize:

• Thread pool starvation
• Blocking I/O in async systems
• N+1 query disasters
• Serialization overhead
• Cache stampedes
• GC-driven latency spikes

This is not about micro-optimizations.
This is about stopping your system from slowly dying.