CURLMOPT_MAX_TOTAL_CONNECTIONS - max simultaneously open connections
#include <curl/curl.h> CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAX_TOTAL_CONNECTIONS, long amount);
curl_multi_setopt options CURLMOPT_MAX_TOTAL_CONNECTIONS(3)
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 connec-
tions. 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 per-
formed 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) time-
out 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.
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | web/curl |
+---------------+------------------+
|Stability | Uncommitted |
+---------------+------------------+
SEE ALSO
CURLMOPT_MAXCONNECTS(3), CURLMOPT_MAX_HOST_CONNECTIONS(3),
NOTES
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from https://curl.se/down-
load/curl-7.83.1.tar.bz2.
Further information about this software can be found on the open source
community website at http://curl.haxx.se/.
libcurl 7.83.1 November 26, 2021
CURLMOPT_MAX_TOTAL_CONNECTIONS(3)