01 · Learn
What you will learn
Connect WAL generation, checkpoints, and storage latency to a measured PostgreSQL performance symptom.
- Measure how quickly WAL is growing
- Recognise checkpoint pressure
- Find why old WAL is being retained
Production Operator · Module
WAL, checkpoints, and storage behaviour
Connect WAL generation, checkpoints, and storage latency to a measured PostgreSQL performance symptom.
Start the first section- Total time
- About 50 minutes
- Learning sections
- 3
- Practice
- Real SQL in a disposable PostgreSQL lab
- Reward
- Shareable module certificate after you pass
02 · Use it
Why this matters
Deleting WAL or changing checkpoint settings without evidence can turn pressure into data loss or a longer recovery.
03 · Practise
What you will do
Read each short section, answer a quick understanding check, then use real SQL to solve a guided task in your own temporary database.
04 · Prove it
How you will finish
Pass the SQL lab and the module assessment. Your result is saved to your signed-in account, and a module certificate is created if you pass.
Before you start
What you should know
- You understand WAL durability and can read PostgreSQL statistics.