.\" ************************************************************************** .\" * _ _ ____ _ .\" * Project ___| | | | _ \| | .\" * / __| | | | |_) | | .\" * | (__| |_| | _ <| |___ .\" * \___|\___/|_| \_\_____| .\" * .\" * Copyright (C) 1998 - 2021, Daniel Stenberg, , et al. .\" * .\" * This software is licensed as described in the file COPYING, which .\" * you should have received as part of this distribution. The terms .\" * are also available at https://curl.se/docs/copyright.html. .\" * .\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell .\" * copies of the Software, and permit persons to whom the Software is .\" * furnished to do so, under the terms of the COPYING file. .\" * .\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY .\" * KIND, either express or implied. .\" * .\" ************************************************************************** .\" .TH CURLMOPT_MAX_TOTAL_CONNECTIONS 3 "4 Nov 2014" "libcurl 7.39.0" "curl_multi_setopt options" .SH NAME CURLMOPT_MAX_TOTAL_CONNECTIONS \- max simultaneously open connections .SH SYNOPSIS #include CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_TOTAL_CONNECTIONS, long amount); .SH DESCRIPTION Pass a long for the \fBamount\fP. 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 \fICURLMOPT_MAX_TOTAL_CONNECTIONS(3)\fP. When the limit is reached, the sessions will be pending until there are available connections. If \fICURLMOPT_PIPELINING(3)\fP 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 \fICURLOPT_TIMEOUT_MS(3)\fP 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 \fICURLOPT_CONNECTTIMEOUT_MS(3)\fP timeout is however treated as a per-connect timeout. .SH 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. .SH PROTOCOLS All .SH EXAMPLE .nf CURLM *m = curl_multi_init(); /* never do more than 15 connections */ curl_multi_setopt(m, CURLMOPT_MAX_TOTAL_CONNECTIONS, 15L); .fi .SH AVAILABILITY Added in 7.30.0 .SH RETURN VALUE Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not. .SH "SEE ALSO" .BR CURLMOPT_MAXCONNECTS "(3), " CURLMOPT_MAX_HOST_CONNECTIONS "(3), "