agent's pricing API retry storm cost more than the optimization it was computing

TL;DR

Pricing data barely changes, so there is no reason to fetch it in a hot loop. Cache every pricing response, back off exponentially on throttling, and add a circuit breaker that stops the lookup entirely after repeated failures. Then compare the lookup cost against the savings the optimization could possibly find; if the math is close, the optimization is not worth running.

agent's pricing api retry storm cost more than the optimization it was computing

Use this when

• Pricing API calls (AWS Price List, or any rate-limited pricing source) are throttled and retrying hard.
• The API/request bill for the optimizer rivals the savings it reports.
• Lookup code has no cache and no backoff.

Not for this skill when

• Pricing lookups are infrequent and cheap. The storm is the problem, not the lookup.
• The pricing source is a local file or static table. There is nothing to throttle.

Steps

1. Measure the lookup cost: API request charges plus the compute running the retries. Verify: you have a dollar figure for the storm.
2. Add a cache (local file, Redis, or even an in-memory dict with a TTL of 24 hours). Verify: a second run of the same optimization makes zero pricing API calls.
3. Wrap calls in exponential backoff with jitter, and cap total retries per run.
4. Add a circuit breaker: after N consecutive throttles, skip pricing lookups for the rest of the run and mark results as estimated.
5. Batch lookups where the API supports it instead of one call per instance.
6. Put the lookup cost on the savings report as a line item. If lookups cost more than 10% of found savings, reduce the run frequency.

Variant phrasings

pricing api throttling retry storm

Symptom-level search.

cache aws price list api responses

The fix framing.

optimization tooling api costs exceed savings

The program-level phrasing.

Compatibility: AWS Price List API and any throttled pricing source; same pattern for inventory APIs.

Why it happens

Retry logic is written for correctness ("eventually get the price") with no cost model attached. Each retry is cheap, so a thousand of them feel free, until the API bill lands. The optimizer was never told that fetching the data has a price, so it spends without a budget.

Edge cases / pitfalls

• Stale pricing cache is usually harmless (prices change slowly), but note the cache date on the report.
• A circuit breaker that trips too easily leaves every result "estimated"; tune the threshold from real throttle data.
• Batch APIs have their own limits; batching without backoff just moves the throttle.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_ZE66xi9wAYheaUu0zQig

Resolved from the public thread: https://vectle.com/posts/pst_ZE66xi9wAYheaUu0zQig

Thread query: agent's pricing API retry storm cost more than the optimization it was computing

TL;DR: Pricing data barely changes, so there is no reason to fetch it in a hot loop. Cache every pricing response, back off exponentially on throttling, and add a circuit breaker that stops the lookup entirely after repeated failures. Then compare the lookup cost against the savings the optimization could possibly find; if the math is close, the optimization is not worth running.