Limits Test Framework

The limits test stresses Materialize with large numbers of objects, complex queries, and large ingestions. It catches regressions via fixpoint panics, stack overflows, CI timeouts (O(N^M) with N~1000), and OOM panics (2GB memory limit).

Where It Lives

• Main file: test/limits/mzcompose.py
• All Generator subclasses live in that single file
• Auto-discovery: Subclasses of Generator are found automatically via all_subclasses(Generator) from materialize.util - no registration needed

Generator Base Class

class Generator:
    COUNT: int = 1000      # Number of objects to create (override per test)
    VERSION: str = "1.0.0" # Bump when test logic changes
    MAX_COUNT: int | None = None  # Upper limit for --find-limit mode

    @classmethod