During runtime upgrade, I estimate gas fee by PaymentQueryInfo api, the return result value is so high， more than the normal value

Question

why cause this?

result, err := client.SignedExtrinsic(
    "0x186c09cac19834761b573b238b6542257d05b1fc5a57688311345d8cdf7e488d",
    "5FjKC4iC797yUWmFJuirEWqvVA2ABy3d41ugxZfHyrHs2AYx",
    "113000000000000000000",
    "0",
)
if err != nil {
    panic(err)
}
info, err := client.PaymentQueryInfo(result)
if err != nil {
    panic(err)
}
fmt.Println(info.PartialFee)

Answer 1

The set_code's weight is extremely large.

https://github.com/paritytech/substrate/blob/88e2c9e3935c3951da3c6e3bdb8fb1ae74dc1258/frame/system/src/lib.rs#L400

As you can see, it uses all the weight of a block. So, you need to pay a lot of fees for that.