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| .TH CURLMOPT_MAX_TOTAL_CONNECTIONS 3 "March 17, 2021" "libcurl 7.78.0" "curl_multi_setopt options" |
| |
| .SH NAME |
| CURLMOPT_MAX_TOTAL_CONNECTIONS \- max simultaneously open connections |
| .SH SYNOPSIS |
| #include <curl/curl.h> |
| |
| 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), " |
