Increase default request rate

[steve-chavez]

Problem

The current request rate of 200 req/s (pg_net.batch_size) is too low for several cases. It's limited this way to save on CPU usage, but this can be improved.

For example, right now the net._http_response tables store the response headers as jsonb. For this, processing is needed on each request/response to convert the headers to jsonb, which consumes CPU.

Solution

Store the response headers as binary and then provide a view that converts them to json on demand. This can be done without a breaking change.

[begank]

+1, I think the value of pg_net.batch_size is far less than 200. By the way, how can I check the value of pg_net.batch_size? @steve-chavez

[steve-chavez]

@begank Try

show pg_net.batch_size;