Timeout budget.

also: timeout budgets · latency budget · deadline propagation · propagate the deadline · propagated deadline

Dividing a request's total allowed time across its downstream calls, each getting what remains rather than a fixed full timeout.

the two-minute refresher

Your API promises 5 s and calls fraud check, the bank and notifications.
Giving each call 5 s means one slow call leaves nothing for the next.
Give each call a share based on its P99, and pass on the time that remains.
Fail fast when the budget runs out instead of doing work nobody will wait for.
Deadline propagation passes the absolute deadline down the chain, so every hop knows the time really left.

also: timeout budgets · latency budget · deadline propagation · propagate the deadline · propagated deadline

Dividing a request's total allowed time across its downstream calls, each getting what remains rather than a fixed full timeout.

Your API promises 5 s and calls fraud check, the bank and notifications.
Giving each call 5 s means one slow call leaves nothing for the next.
Give each call a share based on its P99, and pass on the time that remains.
Fail fast when the budget runs out instead of doing work nobody will wait for.
Deadline propagation passes the absolute deadline down the chain, so every hop knows the time really left.