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MDEV-20907 Set innodb_log_files_in_group=1 by default

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Historically, InnoDB split the redo log into at least 2 files.
MDEV-12061 allowed the minimum to be innodb_log_files_in_group=1,
but it kept the default at innodb_log_files_in_group=2.

Because performance seems to be slightly better with only one log file,
and because implementing an append-only variant of the log would require
a single file, let us define the default to be 1, and have
innodb_log_file_size=96M, to retain the same default total size.
This commit is contained in:
Marko Mäkelä
2019-10-28 17:11:10 +02:00
parent 3043f38436
commit 613e9e7d4d
24 changed files with 59 additions and 66 deletions
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6
mysql-test/include/default_mysqld.cnf
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@@ -1,5 +1,5 @@
# Copyright (c) 2007, 2013, Oracle and/or its affiliates
# Copyright (c) 2010, 2013, Monty Program Ab
# Copyright (c) 2010, 2019, MariaDB Corporation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
@@ -53,8 +53,8 @@ loose-innodb_lru_scan_depth= 100
loose-innodb_write_io_threads= 2
loose-innodb_read_io_threads= 2
loose-innodb_log_buffer_size= 1M
loose-innodb_log_file_size= 5M
loose-innodb_log_files_in_group= 2
loose-innodb_log_file_size= 10M
loose-innodb_log_files_in_group= 1
loose-innodb-stats-persistent= OFF
slave-net-timeout=120