73 lines
1.7 KiB
Markdown
73 lines
1.7 KiB
Markdown
---
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c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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SPDX-License-Identifier: curl
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Title: CURLMOPT_MAXCONNECTS
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Section: 3
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Source: libcurl
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See-also:
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- CURLMOPT_MAX_HOST_CONNECTIONS (3)
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- CURLOPT_MAXCONNECTS (3)
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Protocol:
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- All
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Added-in: 7.16.3
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---
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# NAME
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CURLMOPT_MAXCONNECTS - size of connection cache
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# SYNOPSIS
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~~~c
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#include <curl/curl.h>
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CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAXCONNECTS, long max);
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~~~
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# DESCRIPTION
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Pass a long indicating the **max**, the maximum amount of connections that
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libcurl may keep alive in its connection cache after use. By default libcurl
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enlarges the size for each added easy handle to make it fit 4 times the number
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of added easy handles.
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By setting this option, you prevent the cache size from growing beyond the
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limit set by you.
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When the cache is full, curl closes the oldest connection present in the cache
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to prevent the number of connections from increasing.
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This option is for the multi handle's use only, when using the easy interface
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you should instead use the CURLOPT_MAXCONNECTS(3) option.
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See CURLMOPT_MAX_TOTAL_CONNECTIONS(3) for limiting the number of active
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connections.
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Changing this value when there are transfers in progress is possible, and the
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new value is then used the next time checks are performed. Lowering the value
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does not close down any active transfers, it simply does not allow new ones to
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get made.
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# DEFAULT
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See DESCRIPTION
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# %PROTOCOLS%
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# EXAMPLE
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~~~c
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int main(void)
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{
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CURLM *m = curl_multi_init();
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/* only keep 10 connections in the cache */
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curl_multi_setopt(m, CURLMOPT_MAXCONNECTS, 10L);
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}
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~~~
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# %AVAILABILITY%
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# RETURN VALUE
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Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.
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