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  1. MariaDB Server
  2. MDEV-29986

Set innodb_undo_tablespaces=3 by default

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    Description

      Now that MDEV-19229 allows the parameter innodb_undo_tablespaces to be increased from its current default value 0, we should enable multiple undo tablespaces by default. Likewise, we should set innodb_undo_log_truncate=ON by default, so that the space occupied by possible bursts of undo log records will be eventually reclaimed.

      Edit: Based on some preliminary performance test results presented by axel, innodb_undo_log_truncate=ON seems to reduce throughput. That setting can be changed by SET GLOBAL while the server is running. The main thing here is to run the server with multiple tablespaces by default, so that it will be possible to truncate the undo tablespaces while the server is running.

      Space that was occupied by undo logs in the system tablespace will not be reclaimed until MDEV-14795 has been implemented.

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          causes

          Bug - A problem which impairs or prevents the functions of the product. MDEV-32974 Member fails to join due to old seqno in GTID

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          is blocked by

          Task - A task that needs to be done. MDEV-19229 Allow innodb_undo_tablespaces to be changed after database creation

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-29999 innodb_undo_log_truncate=ON is not crash safe

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-30119 INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION.NAME is NULL for undo tablespaces

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-30122 mariabackup.skip_innodb crashes when innodb_undo_tablespaces > 0

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-30144 Incremental prepare fails when innodb_undo_tablespaces > 0

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-30157 Galera SST doesn't properly handle undo* files from innodb

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-30158 InnoDB fails to start ther server 10.11 when innodb_undo_tablespaces mismatch

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-30180 Server hang with innodb_undo_log_truncate=ON

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed
          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. MDEV-31760 innodb_undo_tablespaces would be better default >= 2

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed
          relates to

          Task - A task that needs to be done. MDEV-14795 InnoDB system tablespace cannot be shrunk

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-30179 mariabackup --backup fails with FATAL ERROR: ... failed to copy datafile.

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-30479 OPT_PAGE_CHECKSUM mismatch during recovery after innodb_undo_log_truncate=ON

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-21952 ibdata1 file size growing in MariaDB

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-32141 More fully document innodb_undo_tablespaces=3 by default

          • Major - Major loss of function.
          • Closed

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              marko Marko Mäkelä
              marko Marko Mäkelä
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                Created:
                Updated:
                Resolved:

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