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Folds every successful auto-routed request into LiteLLM_AutoRouterSession with one conditional upsert at spend-write time, classifying each turn (same model, first visit, return to tier, out of order) against the row's own columns so nothing is read before the write. The upsert's placeholders and argument tuple both derive from the transaction dataclass's own field order, so the SQL and the call site cannot drift apart. GET /auto_router/benchmarks aggregates the rollup, grouped by the full (router, type) identity, and never scans LiteLLM_SpendLogs. A turn's cache interaction is derived once from its usage record (savings.py owns the extraction; compute_savings_spend derives cache reads from usage_object itself), hits are counted order-independently so the overall hit rate matches its covered denominator, caller-chosen session ids are bounded before entering the primary key, and a poisoned statement drops only its own session's remaining turns. Return misses inside the recorded TTL are named for what the telemetry shows (within_ttl) rather than a presumed cause, since a provider can evict early. Savings ride each router's derived baseline by default, so the response carries no deployment-wide baseline label. Rollup retention has its own maximum_autorouter_session_retention_period setting, pattern-identical to the spend-logs knob and running in the same cleanup job on its own cutoff. Every drain trigger sizes the queues through one owner and the enqueue honors disable_spend_logs beside the tool-usage queue it mirrors. |
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