On Tue, 28 Jul 2020, Damon Earp wrote:
I finally got time to sit down and try to figure out what is happening. The
issue goes away when I set CURLMOPT_MAXCONNECTS. Before I was just setting
CURLMOPT_MAX_HOST_CONNECTIONS and most of my connections would live for a
few milliseconds, once MAXCONNECTS is set my reuse and connection duration
increases.
I read this several times but I didn't understand the conclusion nor the
metrics shown.
The default size of the connection pool when using the multi interface is
described in the CURLMOPT_MAXCONNECTS man page (4 times the number of added
easy handles basically). If you want a larger, you of course need to set that
option to something higher.
If you enable verbose mode, libcurl will tell when it re-uses connections for
transfers.
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