curl/docs/libcurl/opts/CURLMOPT_MAXCONNECTS.md
Daniel Stenberg eefcc1bda4
docs: introduce "curldown" for libcurl man page format
curldown is this new file format for libcurl man pages. It is markdown
inspired with differences:

- Each file has a set of leading headers with meta-data
- Supports a small subset of markdown
- Uses .md file extensions for editors/IDE/GitHub to treat them nicely
- Generates man pages very similar to the previous ones
- Generates man pages that still convert nicely to HTML on the website
- Detects and highlights mentions of curl symbols automatically (when
  their man page section is specified)

tools:

- cd2nroff: converts from curldown to nroff man page
- nroff2cd: convert an (old) nroff man page to curldown
- cdall: convert many nroff pages to curldown versions
- cd2cd: verifies and updates a curldown to latest curldown

This setup generates .3 versions of all the curldown versions at build time.

CI:

Since the documentation is now technically markdown in the eyes of many
things, the CI runs many more tests and checks on this documentation,
including proselint, link checkers and tests that make sure we capitalize the
first letter after a period...

Closes #12730
2024-01-23 00:29:02 +01:00

69 lines
1.5 KiB
Markdown

---
c: Copyright (C) Daniel Stenberg, <daniel.se>, et al.
SPDX-License-Identifier: curl
Title: CURLMOPT_MAXCONNECTS
Section: 3
Source: libcurl
See-also:
- CURLMOPT_MAX_HOST_CONNECTIONS (3)
- CURLOPT_MAXCONNECTS (3)
---
# NAME
CURLMOPT_MAXCONNECTS - size of connection cache
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLMcode curl_multi_setopt(CURLM *handle, CURLMOPT_MAXCONNECTS, long max);
~~~
# DESCRIPTION
Pass a long indicating the **max**. The set number is used as the maximum
amount of simultaneously open connections that libcurl may keep in its
connection cache after completed use. By default libcurl enlarges the size for
each added easy handle to make it fit 4 times the number of added easy
handles.
By setting this option, you can prevent the cache size from growing beyond the
limit set by you.
When the cache is full, curl closes the oldest one in the cache to prevent the
number of open connections from increasing.
This option is for the multi handle's use only, when using the easy interface
you should instead use the CURLOPT_MAXCONNECTS(3) option.
See CURLMOPT_MAX_TOTAL_CONNECTIONS(3) for limiting the number of active
connections.
# DEFAULT
See DESCRIPTION
# PROTOCOLS
All
# EXAMPLE
~~~c
int main(void)
{
CURLM *m = curl_multi_init();
/* only keep 10 connections in the cache */
curl_multi_setopt(m, CURLMOPT_MAXCONNECTS, 10L);
}
~~~
# AVAILABILITY
Added in 7.16.3
# RETURN VALUE
Returns CURLM_OK if the option is supported, and CURLM_UNKNOWN_OPTION if not.