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<?xml version="1.0" ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>SSL_CTX_sess_set_cache_size</title> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rev="made" href="mailto:root@localhost" /> </head> <body> <ul id="index"> <li><a href="#NAME">NAME</a></li> <li><a href="#SYNOPSIS">SYNOPSIS</a></li> <li><a href="#DESCRIPTION">DESCRIPTION</a></li> <li><a href="#NOTES">NOTES</a></li> <li><a href="#RETURN-VALUES">RETURN VALUES</a></li> <li><a href="#SEE-ALSO">SEE ALSO</a></li> <li><a href="#COPYRIGHT">COPYRIGHT</a></li> </ul> <h1 id="NAME">NAME</h1> <p>SSL_CTX_sess_set_cache_size, SSL_CTX_sess_get_cache_size - manipulate session cache size</p> <h1 id="SYNOPSIS">SYNOPSIS</h1> <pre><code> #include <openssl/ssl.h> long SSL_CTX_sess_set_cache_size(SSL_CTX *ctx, long t); long SSL_CTX_sess_get_cache_size(SSL_CTX *ctx);</code></pre> <h1 id="DESCRIPTION">DESCRIPTION</h1> <p>SSL_CTX_sess_set_cache_size() sets the size of the internal session cache of context <b>ctx</b> to <b>t</b>. This value is a hint and not an absolute; see the notes below.</p> <p>SSL_CTX_sess_get_cache_size() returns the currently valid session cache size.</p> <h1 id="NOTES">NOTES</h1> <p>The internal session cache size is SSL_SESSION_CACHE_MAX_SIZE_DEFAULT, currently 1024*20, so that up to 20000 sessions can be held. This size can be modified using the SSL_CTX_sess_set_cache_size() call. A special case is the size 0, which is used for unlimited size.</p> <p>If adding the session makes the cache exceed its size, then unused sessions are dropped from the end of the cache. Cache space may also be reclaimed by calling <a href="../man3/SSL_CTX_flush_sessions.html">SSL_CTX_flush_sessions(3)</a> to remove expired sessions.</p> <p>If the size of the session cache is reduced and more sessions are already in the session cache, old session will be removed at the next time a session shall be added. This removal is not synchronized with the expiration of sessions.</p> <h1 id="RETURN-VALUES">RETURN VALUES</h1> <p>SSL_CTX_sess_set_cache_size() returns the previously valid size.</p> <p>SSL_CTX_sess_get_cache_size() returns the currently valid size.</p> <h1 id="SEE-ALSO">SEE ALSO</h1> <p><a href="../man7/ssl.html">ssl(7)</a>, <a href="../man3/SSL_CTX_set_session_cache_mode.html">SSL_CTX_set_session_cache_mode(3)</a>, <a href="../man3/SSL_CTX_sess_number.html">SSL_CTX_sess_number(3)</a>, <a href="../man3/SSL_CTX_flush_sessions.html">SSL_CTX_flush_sessions(3)</a></p> <h1 id="COPYRIGHT">COPYRIGHT</h1> <p>Copyright 2001-2016 The OpenSSL Project Authors. All Rights Reserved.</p> <p>Licensed under the OpenSSL license (the "License"). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p> </body> </html>