diff options
author | Daniel Stenberg <daniel@haxx.se> | 2019-04-14 23:20:01 +0200 |
---|---|---|
committer | Daniel Stenberg <daniel@haxx.se> | 2019-04-21 23:06:23 +0200 |
commit | e649432e7234dfe6905f4663bd0ce7b37ef2c5e7 (patch) | |
tree | ec343333607d509a68fa8ad74cdb9833c1f380ba /docs | |
parent | 060f870b85a6ee85668caeb791935fe98f4da56d (diff) |
CURLOPT_MAXAGE_CONN: set the maximum allowed age for conn reuse
... and disconnect too old ones instead of trying to reuse.
Default max age is set to 118 seconds.
Ref: #3722
Closes #3782
Diffstat (limited to 'docs')
-rw-r--r-- | docs/TODO | 11 | ||||
-rw-r--r-- | docs/libcurl/curl_easy_setopt.3 | 2 | ||||
-rw-r--r-- | docs/libcurl/opts/CURLOPT_MAXAGE_CONN.3 | 65 | ||||
-rw-r--r-- | docs/libcurl/opts/Makefile.inc | 1 | ||||
-rw-r--r-- | docs/libcurl/symbols-in-versions | 1 |
5 files changed, 69 insertions, 11 deletions
@@ -35,7 +35,6 @@ 1.16 Try to URL encode given URL 1.17 Add support for IRIs 1.18 try next proxy if one doesn't work - 1.19 Timeout idle connections from the pool 1.20 SRV and URI DNS records 1.21 Have the URL API offer IDN decoding 1.22 CURLINFO_PAUSE_STATE @@ -373,16 +372,6 @@ https://github.com/curl/curl/issues/896 -1.19 Timeout idle connections from the pool - - libcurl currently keeps connections in its connection pool for an indefinite - period of time, until it either gets reused, gets noticed that it has been - closed by the server or gets pruned to make room for a new connection. - - To reduce overhead (especially for when we add monitoring of the connections - in the pool), we should introduce a timeout so that connections that have - been idle for N seconds get closed. - 1.20 SRV and URI DNS records Offer support for resolving SRV and URI DNS records for libcurl to know which diff --git a/docs/libcurl/curl_easy_setopt.3 b/docs/libcurl/curl_easy_setopt.3 index fc361d80c..1f18a3494 100644 --- a/docs/libcurl/curl_easy_setopt.3 +++ b/docs/libcurl/curl_easy_setopt.3 @@ -468,6 +468,8 @@ Maximum number of connections in the connection pool. See \fICURLOPT_MAXCONNECTS Use a new connection. \fICURLOPT_FRESH_CONNECT(3)\fP .IP CURLOPT_FORBID_REUSE Prevent subsequent connections from re-using this. See \fICURLOPT_FORBID_REUSE(3)\fP +.IP CURLOPT_MAXAGE_CONN +Limit the age of connections for reuse. See \fICURLOPT_MAXAGE_CONN(3)\fP .IP CURLOPT_CONNECTTIMEOUT Timeout for the connection phase. See \fICURLOPT_CONNECTTIMEOUT(3)\fP .IP CURLOPT_CONNECTTIMEOUT_MS diff --git a/docs/libcurl/opts/CURLOPT_MAXAGE_CONN.3 b/docs/libcurl/opts/CURLOPT_MAXAGE_CONN.3 new file mode 100644 index 000000000..f91bf7a8d --- /dev/null +++ b/docs/libcurl/opts/CURLOPT_MAXAGE_CONN.3 @@ -0,0 +1,65 @@ +.\" ************************************************************************** +.\" * _ _ ____ _ +.\" * Project ___| | | | _ \| | +.\" * / __| | | | |_) | | +.\" * | (__| |_| | _ <| |___ +.\" * \___|\___/|_| \_\_____| +.\" * +.\" * Copyright (C) 2019, Daniel Stenberg, <daniel@haxx.se>, 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.haxx.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 CURLOPT_MAXAGE_CONN 3 "18 Apr 2019" "libcurl 7.65.0" "curl_easy_setopt options" +.SH NAME +CURLOPT_MAXAGE_CONN \- max idle time allowed for reusing a connection +.SH SYNOPSIS +#include <curl/curl.h> + +CURLcode curl_easy_setopt(CURL *handle, CURLOPT_MAXAGE_CONN, long maxage); +.SH DESCRIPTION +Pass a long as parameter containing \fImaxage\fP - the maximum time in seconds +that you allow an existing connection to have to be considered for reuse for +this request. + +The "connection cache" that holds previously used connections. When a new +request is to be done, it will consider any connection that matches for +reuse. The \fICURLOPT_MAXAGE_CONN(3)\fP limit prevents libcurl from trying +very old connections for reuse, since old connections have a high risk of not +working and thus trying them is a performance loss and sometimes service loss +due to the difficulties to figure out the situation. If a connection is found +in the cache that is older than this set \fImaxage\fP, it will instead be +closed. +.SH DEFAULT +Default maxage is 118 seconds. +.SH PROTOCOLS +All +.SH EXAMPLE +.nf +CURL *curl = curl_easy_init(); +if(curl) { + curl_easy_setopt(curl, CURLOPT_URL, "http://example.com"); + + /* only allow 30 seconds idle time */ + curl_easy_setopt(curl, CURLOPT_MAXAGE_CONN, 30L); + + curl_easy_perform(curl); +} +.fi +.SH AVAILABILITY +Added in libcurl 7.65.0 +.SH RETURN VALUE +Returns CURLE_OK. +.SH "SEE ALSO" +.BR CURLOPT_TIMEOUT "(3), " CURLOPT_FORBID_REUSE "(3), " +.BR CURLOPT_FRESH_CONNECT "(3), " diff --git a/docs/libcurl/opts/Makefile.inc b/docs/libcurl/opts/Makefile.inc index 07547503b..c8e15a5ed 100644 --- a/docs/libcurl/opts/Makefile.inc +++ b/docs/libcurl/opts/Makefile.inc @@ -189,6 +189,7 @@ man_MANS = \ CURLOPT_MAIL_AUTH.3 \ CURLOPT_MAIL_FROM.3 \ CURLOPT_MAIL_RCPT.3 \ + CURLOPT_MAXAGE_CONN.3 \ CURLOPT_MAXCONNECTS.3 \ CURLOPT_MAXFILESIZE.3 \ CURLOPT_MAXFILESIZE_LARGE.3 \ diff --git a/docs/libcurl/symbols-in-versions b/docs/libcurl/symbols-in-versions index 0f43aee31..36c510139 100644 --- a/docs/libcurl/symbols-in-versions +++ b/docs/libcurl/symbols-in-versions @@ -463,6 +463,7 @@ CURLOPT_LOW_SPEED_TIME 7.1 CURLOPT_MAIL_AUTH 7.25.0 CURLOPT_MAIL_FROM 7.20.0 CURLOPT_MAIL_RCPT 7.20.0 +CURLOPT_MAXAGE_CONN 7.65.0 CURLOPT_MAXCONNECTS 7.7 CURLOPT_MAXFILESIZE 7.10.8 CURLOPT_MAXFILESIZE_LARGE 7.11.0 |