Hi,
Is there a way to limit the number of new connections opened per second? I know I can limit the maximum number of total connections, and the number of connections that stay opened on the connection cache, but I have not found an easy way to control how many new connections are opened per second.
The reason I am asking this question is because I have problems with some proxy servers timing out if I open too many connections too quickly. I can open lots of connections slowly, and once open they handle lots of requests in parallel without problems, but the proxies seem to collapse when I open too many connections in a sort period of time.
My program has to run for long periods of time and the load is unpredictable, it can be low for a while and suddenly spike with a big number of request to perform. So far I have not managed to accurately predict how many connections libcurl will open under the hood. I am using libcurl's multi interface and I can limit how many handles I add per second, but whether those will use existing connections or open new ones is hard to predict and to limit.
Thanks.

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Received on 2015-12-04