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  1. MariaDB Server
  2. MDEV-35190

HASH_SEARCH() is duplicating effort before HASH_INSERT() or HASH_DELETE()

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    Description

      The InnoDB hash table implementation defines the macros HASH_SEARCH, HASH_INSERT, and HASH_DELETE. Often, a HASH_SEARCH operation would already navigate to the correct hash bucket and to the correct position for a subsequent insert or delete operation. This effort will be wasted, because there is no way for HASH_INSERT or HASH_DELETE to refer to that position.

      Similar to what was done to buf_pool.page_hash in MDEV-26826, we had better replace these macros with something more efficient, basically passing some kind of "iterator" from a search operation to the insert or delete operations.

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-35247 ut_fold_ull() and ut_hash_ulint() are a waste

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-35484 InnoDB hash_table_t::array is not aligned to cache line size

          • Major - Major loss of function.
          • Open

          New Feature - A new feature of the product, which has yet to be developed. MDEV-35049 fix innodb-adaptive-hash-index scalability with multiple threads

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-35189 Updating cache for INFORMATION_SCHEMA.INNODB_LOCKS et al is suboptimal

          • Major - Major loss of function.
          • Closed

          Activity

            Transition Time In Source Status Execution Times
            Marko Mäkelä made transition -
            Open In Progress
            		8s 1
            Marko Mäkelä made transition -
            In Progress In Review
            		6d 22h 30m 1
            Marko Mäkelä made transition -
            Stalled In Review
            		4d 7h 20m 1
            Debarun Banerjee made transition -
            In Review Stalled
            		23d 32m 2
            Marko Mäkelä made transition -
            Stalled Closed
            		19h 9m 1

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              marko Marko Mäkelä
              marko Marko Mäkelä
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