OptionalengineOptionalmemoryOptionalpersistOwn persist() cache for this runtime (tenant / request isolation). Default: the process-wide cache.
OptionalpreferOptionalstrictStrict engine selection: the requested engine must execute the plan itself. Any runtime fallback
(backend throws, plan unsupported) or a backend that delegates every node to another engine raises
EngineStrictError with the reasons instead of silently running elsewhere.
OptionalwasmOptionalwebgpu
Soft memory budget / spill / persist cache (also settable via
setMemoryPolicy).