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SSL_CTX_sess_set_cache_size.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" SSL_CTX_sess_set_cache_size, SSL_CTX_sess_get_cache_size \- manipulate session cache size .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #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); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" \&\fBSSL_CTX_sess_set_cache_size()\fR sets the size of the internal session cache of context \fBctx\fR to \fBt\fR. This value is a hint and not an absolute; see the notes below. .PP \&\fBSSL_CTX_sess_get_cache_size()\fR returns the currently valid session cache size. .SH "NOTES" .IX Header "NOTES" The internal session cache size is \s-1SSL_SESSION_CACHE_MAX_SIZE_DEFAULT,\s0 currently 1024*20, so that up to 20000 sessions can be held. This size can be modified using the \fBSSL_CTX_sess_set_cache_size()\fR call. A special case is the size 0, which is used for unlimited size. .PP 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 \&\fBSSL_CTX_flush_sessions\fR\|(3) to remove expired sessions. .PP 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. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBSSL_CTX_sess_set_cache_size()\fR returns the previously valid size. .PP \&\fBSSL_CTX_sess_get_cache_size()\fR returns the currently valid size. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBssl\fR\|(7), \&\fBSSL_CTX_set_session_cache_mode\fR\|(3), \&\fBSSL_CTX_sess_number\fR\|(3), \&\fBSSL_CTX_flush_sessions\fR\|(3) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2001\-2016 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.
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