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8da3fea266
It is well-known that due to concurrency issues, a slave can become
inconsistent when a transaction contains updates to both transaction and
non-transactional tables.
In a nutshell, the current code-base tries to preserve causality among the
statements by writing non-transactional statements to the txn-cache which
is flushed upon commit. However, modifications done to non-transactional
tables on behalf of a transaction become immediately visible to other
connections but may not immediately get into the binary log and therefore
consistency may be broken.
In general, it is impossible to automatically detect causality/dependency
among statements by just analyzing the statements sent to the server. This
happen because dependency may be hidden in the application code and it is
necessary to know a priori all the statements processed in the context of
a transaction such as in a procedure. Moreover, even for the few cases that
we could automatically address in the server, the computation effort
required could make the approach infeasible.
So, in this patch we introduce the option
- "--binlog-direct-non-transactional-updates" that can be used to bypass
the current behavior in order to write directly to binary log statements
that change non-transactional tables.
Besides, it is used to enable the WL#2687 which is disabled by default.
47 lines
1.6 KiB
INI
47 lines
1.6 KiB
INI
# Copyright (C) 2009 Sun Microsystems, Inc
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 2 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# Default values that applies to all MySQL Servers
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[mysqld]
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open-files-limit= 1024
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local-infile
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default-character-set= latin1
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# Increase default connect_timeout to avoid intermittent
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# disconnects when test servers are put under load see BUG#28359
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connect-timeout= 60
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log-bin-trust-function-creators=1
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key_buffer_size= 1M
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sort_buffer= 256K
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max_heap_table_size= 1M
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loose-innodb_data_file_path= ibdata1:10M:autoextend
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loose-innodb_buffer_pool_size= 8M
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loose-innodb_write_io_threads= 2
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loose-innodb_read_io_threads= 2
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loose-innodb_log_buffer_size= 1M
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loose-innodb_log_file_size= 5M
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loose-innodb_additional_mem_pool_size= 1M
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loose-innodb_log_files_in_group= 2
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slave-net-timeout=120
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log-bin=mysqld-bin
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# Run tests with the performance schema instrumentation
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loose-enable-performance-schema
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binlog-direct-non-transactional-updates
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