NAME

       CURLMOPT_MAX_TOTAL_CONNECTIONS - max simultaneously open connections

SYNOPSIS

       #include <curl/curl.h>

       CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_TOTAL_CONNECTIONS,
                                   long amount);

DESCRIPTION

       Pass  a  long  for  the  amount. The set number will be used as the maximum number of simultaneously open
       connections in total using this multi handle. For each new session, libcurl will open a new connection up
       to the limit set by CURLMOPT_MAX_TOTAL_CONNECTIONS(3). When the limit is reached, the  sessions  will  be
       pending  until there are available connections. If CURLMOPT_PIPELINING(3) is enabled, libcurl will try to
       use multiplexing if the host is capable of it.

       When more transfers are added to the multi handle than what can be performed due to the set  limit,  they
       will  be queued up waiting for their chance. When that happens, the CURLOPT_TIMEOUT_MS(3) timeout will be
       counted inclusive of the waiting time, meaning that if you set a too narrow timeout in such  a  case  the
       transfer might never even start before it times out.

       Even  in  the  queued up situation, the CURLOPT_CONNECTTIMEOUT_MS(3) timeout is however treated as a per-
       connect timeout.

DEFAULT

       The default value is 0, which means that there is no limit. It is then simply controlled by the number of
       easy handles added.

PROTOCOLS

       All

EXAMPLE

       CURLM *m = curl_multi_init();
       /* never do more than 15 connections */
       curl_multi_setopt(m, CURLMOPT_MAX_TOTAL_CONNECTIONS, 15L);

AVAILABILITY

       Added in 7.30.0

RETURN VALUE

       Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.

SEE ALSO

       CURLMOPT_MAXCONNECTS(3), CURLMOPT_MAX_HOST_CONNECTIONS(3),

libcurl 7.81.0                                  November 26, 2021              CURLMOPT_MAX_TOTAL_CONNECTIONS(3)