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Marko Mäkelä 44dce3b207 MDEV-29986 Set innodb_undo_tablespaces=3 by default 
Starting with commit baf276e6d4 (MDEV-19229)
the parameter innodb_undo_tablespaces can be increased from its
previous default value 0 while allowing an upgrade from old databases.

We will change the default setting to innodb_undo_tablespaces=3
so that the space occupied by possible bursts of undo log records
can be reclaimed after SET GLOBAL innodb_undo_log_truncate=ON.

We will not enable innodb_undo_log_truncate by default, because it
causes some observable performance degradation.

Special thanks to Thirunarayanan Balathandayuthapani for diagnosing
and fixing a number of bugs related to this new default setting.

Tested by: Matthias Leich, Axel Schwenke, Vladislav Vaintroub
(with both values of innodb_undo_log_truncate)
2023-01-13 12:46:30 +02:00
..
aws_sdk MDEV-23539: aws key plugin - fails to build 2020-10-26 14:59:42 +11:00
mariabackup MDEV-29986 Set innodb_undo_tablespaces=3 by default 2023-01-13 12:46:30 +02:00
readline Merge branch '5.5' into 10.1 2019-05-11 22:19:05 +03:00
wolfssl Merge branch '10.5' into 10.6 2022-10-15 23:47:33 +02:00
charset2html.c Merge branch '5.5' into 10.1 2019-05-11 22:19:05 +03:00
CMakeLists.txt MDEV-22552: mytop packaging 2021-10-25 12:15:49 +02:00
comp_err.c MDEV-27142 - postfix 2022-11-04 13:50:36 +01:00
innochecksum.cc MDEV-28554: Remove innodb_version 2022-06-03 12:20:19 +03:00
my_print_defaults.c MDEV-26238: Remove inconsistent behaviour of --default-* options 2022-01-26 18:43:06 +01:00
mysql_waitpid.c Added 'const' to arguments in get_one_option and find_typeset() 2021-02-08 12:16:29 +02:00
mysqld_safe_helper.c mysqld_safe_help - remove warning 2017-04-30 15:06:01 +04:00
perror.c Added 'const' to arguments in get_one_option and find_typeset() 2021-02-08 12:16:29 +02:00
replace.c Merge 10.4 into 10.5 2022-07-01 14:42:02 +03:00
resolve_stack_dump.c MDEV-22189: Change error messages inside code to have mariadb instead of 2021-05-24 11:38:13 +05:30
resolveip.c Added 'const' to arguments in get_one_option and find_typeset() 2021-02-08 12:16:29 +02:00