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  1. MariaDB Server
  2. MDEV-33067

SCN(Sequence Commit Number) based MVCC

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    Description

      SCN is a sequence number which was generated while committing transaction, and it should always be increased. With SCN, the snapshot for MVCC can only use a version number to compare with SCN.

      origin commit from zhai weixiang: https://bugs.mysql.com/bug.php?id=109599

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          is blocked by

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. MDEV-33066 Tencent requested features

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

          Bug - A problem which impairs or prevents the functions of the product. MDEV-35702 ReadViewBase::m_ids had better use an initial fixed part

          • Critical - Crashes, loss of data, severe memory leak.
          • Open
          relates to

          Task - A task that needs to be done. MDEV-12288 Reset DB_TRX_ID when the history is removed, to speed up MVCC

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. MDEV-15104 Remove trx_sys_t::rw_trx_ids and trx_sys_t::serialisation_list

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. MDEV-15158 On commit, do not write to the TRX_SYS page

          • Major - Major loss of function.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. MDEV-17598 InnoDB index option for per-record transaction ID

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. MDEV-20630 lf_hash get performance regression since the bucket size won't decrease

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

          Bug - A problem which impairs or prevents the functions of the product. MDEV-21423 lock-free trx_sys get performance regression cause by lf_find and ut_delay

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

          Bug - A problem which impairs or prevents the functions of the product. MDEV-35702 ReadViewBase::m_ids had better use an initial fixed part

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

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              marko Marko Mäkelä
              zhangyuan zhangyuan
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