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  1. MariaDB Server
  2. MDEV-11378

AliSQL: [Perf] Issue#23 MERGE INNODB AIO REQUEST

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      Description:
      		 
      ------------
      		 
      The InnoDB engine support native AIO and simulated AIO on linux platform.
      		 
      Native AIO use io_submit that glibc supplied to request IO.
      		 
      But InnoDB engine requested AIO one by one through io_submit when trigger read-ahead,
      		 
      so it is a little inefficiency.
      		 
       
      		 
      Solution:
      		 
      ---------
      		 
      We buffered the AIO requests, then io_submit all.
      		 
      For example: when linear-ahead. we buffered next 64 pages io requests,
      		 
      at last, io_submit all io requests.

      https://github.com/alibaba/AliSQL/commit/4c9d1c72b9db5f7d2267906e0fa6d66948f5dc6c

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-26547 Restoring InnoDB buffer pool dump is single-threaded for no reason

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-30986 Slow full index scan in 10.6 vs 10.5 for the (slow) I/O-bound case

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

          Bug - A problem which impairs or prevents the functions of the product. MDEV-32067 InnoDB linear read ahead had better be logical

          • Major - Major loss of function.
          • Open

          Task - A task that needs to be done. MDEV-16526 Overhaul the InnoDB page flushing

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-31095 Create separate tpool thread for async aio

          • Major - Major loss of function.
          • Closed

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              marko Marko Mäkelä
              svoj Sergey Vojtovich
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