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MariaDB server is a community developed fork of MySQL server. Started by core members of the original MySQL team, MariaDB actively works with outside developers to deliver the most featureful, stable, and sanely licensed open SQL server in the industry.
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![]() WITH LARGE BUFFER POOL (Note: this a backport of revno:3472 from mysql-trunk) rb://845 approved by: Marko When dropping a table (with an .ibd file i.e.: with innodb_file_per_table set) we scan entire LRU to invalidate pages from that table. This can be painful in case of large buffer pools as we hold the buf_pool->mutex for the scan. Note that gravity of the problem does not depend on the size of the table. Even with an empty table but a large and filled up buffer pool we'll end up scanning a very long LRU list. The fix is to scan flush_list and just remove the blocks belonging to the table from the flush_list, marking them as non-dirty. The blocks are left in the LRU list for eventual eviction due to aging. The flush_list is typically much smaller than the LRU list but for cases where it is very long we have the solution of releasing the buf_pool->mutex after scanning 1K pages. buf_page_[set|unset]_sticky(): Use new IO-state BUF_IO_PIN to ensure that a block stays in the flush_list and LRU list when we release buf_pool->mutex. Previously we have been abusing BUF_IO_READ to achieve this. |
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cmake | ||
cmd-line-utils | ||
dbug | ||
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extra | ||
include | ||
libmysql | ||
libmysqld | ||
libservices | ||
man | ||
mysql-test | ||
mysys | ||
packaging/WiX | ||
plugin | ||
regex | ||
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sql | ||
sql-bench | ||
sql-common | ||
storage | ||
strings | ||
support-files | ||
tests | ||
unittest | ||
vio | ||
win | ||
zlib | ||
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BUILD-CMAKE | ||
CMakeLists.txt | ||
config.h.cmake | ||
configure.cmake | ||
COPYING | ||
INSTALL-SOURCE | ||
INSTALL-WIN-SOURCE | ||
README | ||
VERSION |
MySQL Server 5.5 This is a release of MySQL, a dual-license SQL database server. For the avoidance of doubt, this particular copy of the software is released under the version 2 of the GNU General Public License. MySQL is brought to you by Oracle. Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. License information can be found in the COPYING file. MySQL FOSS License Exception We want free and open source software applications under certain licenses to be able to use specified GPL-licensed MySQL client libraries despite the fact that not all such FOSS licenses are compatible with version 2 of the GNU General Public License. Therefore there are special exceptions to the terms and conditions of the GPLv2 as applied to these client libraries, which are identified and described in more detail in the FOSS License Exception at <http://www.mysql.com/about/legal/licensing/foss-exception.html>. This distribution may include materials developed by third parties. For license and attribution notices for these materials, please refer to the documentation that accompanies this distribution (see the "Licenses for Third-Party Components" appendix) or view the online documentation at <http://dev.mysql.com/doc/>. GPLv2 Disclaimer For the avoidance of doubt, except that if any license choice other than GPL or LGPL is available it will apply instead, Oracle elects to use only the General Public License version 2 (GPLv2) at this time for any software where a choice of GPL license versions is made available with the language indicating that GPLv2 or any later version may be used, or where a choice of which version of the GPL is applied is otherwise unspecified. For further information about MySQL or additional documentation, see: - The latest information about MySQL: http://www.mysql.com - The current MySQL documentation: http://dev.mysql.com/doc Some Reference Manual sections of special interest: - If you are migrating from an older version of MySQL, please read the "Upgrading from..." section. - To see what MySQL can do, take a look at the features section. - For installation instructions, see the Installing and Upgrading chapter. - For the new features/bugfix history, see the MySQL Change History appendix. You can browse the MySQL Reference Manual online or download it in any of several formats at the URL given earlier in this file. Source distributions include a local copy of the manual in the Docs directory.