Pass a long. The set amount will be the maximum number of simultaneously
open persistent connections that libcurl may cache in the pool associated with
this handle. The default is 5, and there isnt much point in changing this
value unless you are perfectly aware of how this works and changes libcurls
behaviour. This concerns connections using any of the protocols that support
When reaching the maximum limit, curl closes the oldest one in the cache to
prevent increasing the number of open connections.
If you already have performed transfers with this curl handle, setting a
smaller CURLOPT_MAXCONNECTS(3) than before may cause open connections to
get closed unnecessarily.
If you add this easy handle to a multi handle, this setting is not
acknowledged, and you must instead use curl_multi_setopt(3) and the