Inject a long read transaction and observe why a healthy process can still grow its WAL toward disk exhaustion.
A SQLite service can keep answering health checks while its WAL grows without a successful checkpoint. One forgotten read transaction is enough to reproduce the risk.
Run a controlled drill:
Enable WAL mode and create a small table.
Open connection A, begin a read transaction, and keep it open.
From connection B, commit batches of writes for 60 seconds.
Build a small backup drill that catches missing WAL data and incompatible schema changes.
Uncover a 16-year-old SQLite WAL bug using TLA+. Explore formal verification's role in debugging legacy systems.
Inject disk exhaustion locally, observe write failure, and prove cleanup restores durable writes.
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