Limits & Credits

Deltex meters everything with one unit: the credit. There are no separate line items for reads, writes, and compute — every plan includes a monthly credit allowance, and paid plans bill only for usage beyond it.

How credits are counted

So a read query is about 1 credit and a write query is about 2 (the statement plus the write). A run of 1,000 simple SELECTs costs roughly 1,000 credits; 1,000 inserts roughly 2,000. Compute-heavy analytical scans add a credit per CPU-second.

Plan allowances

When you hit a limit

• Free credit cap — the free tier is hard-capped. When you reach your monthly credits, requests return 429 until the allowance resets at the start of the next month. You are never billed overage on free.
• Paid overage — Pro and Scale keep serving past the included allowance and bill the overage at the rate above. There is no hard stop.
• Rate limit — exceeding your per-minute request rate returns 429 with a Retry-After header. This is independent of your credit balance.

Per-request limits

The 50 ms ceiling is the edge runtime's per-request CPU budget; the Server-Timing header on every response reports the vcpu time consumed so you can see how close a query runs to it. For very large result sets, stream them with the /*+ STREAM */ hint instead of buffering a single response.