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  1. MariaDB Server
  2. MDEV-14638

Replace trx_sys_t::rw_trx_set with LF_HASH

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    Description

      trx_sys_t::rw_trx_set implemented as std::set, which does a few quite expensive operations under trx_sys_t::mutex protection. E.g. malloc/free when adding/removing elements.

      Aim of this task is to reduce trx_sys_t::mutex contention by replacing rw_trx_set with LF_HASH.

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          causes

          Bug - A problem which impairs or prevents the functions of the product. MDEV-15658 Assertion `!expl_lock || expl_lock->trx == arg->impl_trx' failed in lock_rec_other_trx_holds_expl_callback

          • Major - Major loss of function.
          • Closed

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. MDEV-22680 InnoDB trx_sys improvements

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. MDEV-25125 Draft: InnoDB: Assertion failure in trx0i_s.cc line 1167 upon SELECT * FROM information_schema.innodb_trx

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-33161 Function pointer signature mismatch in LF_HASH

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-23510 Crash in my_strnncoll_binary while running point-select

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

          Task - A task that needs to be done. MDEV-11215 Several locks taken to same record inside a transaction.

          • Major - Major loss of function.
          • Stalled

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              svoj Sergey Vojtovich
              svoj Sergey Vojtovich
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