Mercurial > hg > nginx
annotate docs/text/LICENSE @ 7374:de50fa05fbeb
Cache: fixed minimum cache keys zone size limit.
Size of a shared memory zones must be at least two pages - one page
for slab allocator internal data, and another page for actual allocations.
Using 8192 instead is wrong, as there are systems with page sizes other
than 4096.
Note well that two pages is usually too low as well. In particular, cache
is likely to use two allocations of different sizes for global structures,
and at least four pages will be needed to properly allocate cache nodes.
Except in a few very special cases, with keys zone of just two pages nginx
won't be able to start. Other uses of shared memory impose a limit
of 8 pages, which provides some room for global allocations. This patch
doesn't try to address this though.
Inspired by ticket #1665.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Wed, 31 Oct 2018 16:49:39 +0300 |
parents | c6cc8db553eb |
children | f56a4c91b303 |
rev | line source |
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450 | 1 /* |
7187 | 2 * Copyright (C) 2002-2018 Igor Sysoev |
3 * Copyright (C) 2011-2018 Nginx, Inc. | |
4753
808dee4f2b22
Synchronized the license text with the FreeBSD's bsd-style-copyright.
Ruslan Ermilov <ru@nginx.com>
parents:
4412
diff
changeset
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4 * All rights reserved. |
450 | 5 * |
6 * Redistribution and use in source and binary forms, with or without | |
7 * modification, are permitted provided that the following conditions | |
8 * are met: | |
9 * 1. Redistributions of source code must retain the above copyright | |
10 * notice, this list of conditions and the following disclaimer. | |
11 * 2. Redistributions in binary form must reproduce the above copyright | |
12 * notice, this list of conditions and the following disclaimer in the | |
13 * documentation and/or other materials provided with the distribution. | |
14 * | |
4753
808dee4f2b22
Synchronized the license text with the FreeBSD's bsd-style-copyright.
Ruslan Ermilov <ru@nginx.com>
parents:
4412
diff
changeset
|
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
450 | 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
4753
808dee4f2b22
Synchronized the license text with the FreeBSD's bsd-style-copyright.
Ruslan Ermilov <ru@nginx.com>
parents:
4412
diff
changeset
|
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
450 | 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
25 * SUCH DAMAGE. | |
26 */ |