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  1. MariaDB Server
  2. MDEV-15528

Avoid writing freed InnoDB pages

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      Description

      When a InnoDB data file page is freed, its contents becomes garbage, and any storage allocated in the data file is wasted.

      MariaDB 10.4 introduced an InnoDB redo log record MLOG_INIT_FREE_PAGE for marking pages as freed. In MDEV-12353 (MariaDB 10.5.2), that record was replaced with FREE_PAGE. This record could be treated as no-op, or we can punch a hole for page_compressed=1 tables.

      If innodb_immediate_scrub_data_uncompressed is set, we should initialize the page with zeros. This will replace some of the non-working scrubbing logic (MDEV-8139). The scrubbing will be fixed further in MDEV-8139.

      The following parameters will be deprecated and ignored and the problematic ‘background scrubbing’ code removed:

      • innodb-background-scrub-data-uncompressed
      • innodb-background-scrub-data-compressed
      • innodb-background-scrub-data-interval
      • innodb-background-scrub-data-check-interval

      For page_compressed tables the freed page will be hole-punched

        Attachments

          Issue Links

          blocks

          Bug - A problem which impairs or prevents the functions of the product. MDEV-18724 Replace buf_block_t::mutex with more std::atomic

          • Major - Major loss of function.
          • Open
          causes

          Bug - A problem which impairs or prevents the functions of the product. MDEV-22096 Mariabackup copied too old page or too new checkpoint

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-22097 Not applying DELETE_ROW_FORMAT_REDUNDANT due to corruption

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-22103 INNODB_ENCRYPTION_NUM_KEY_REQUESTS is missing from INFORMATION_SCHEMA.GLOBAL_STATUS

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-22139 fseg_free_page_low() fails to write FREE_PAGE record, breaking recovery

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-22169 Recovery fails after failing to insert into mlog_init

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-22495 Assertion mode == 16 || mode == 12 || fix_block->page.status != buf_page_t::FREED failed in ibuf_read_merge_pages()

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

          Bug - A problem which impairs or prevents the functions of the product. MDEV-11696 Page Compression Has No Effect on Table Data File Size

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

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

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

          Bug - A problem which impairs or prevents the functions of the product. MDEV-17380 innodb_flush_neighbors=ON should be ignored on SSD

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-8139 Fix scrubbing

          • Major - Major loss of function.
          • In Review

          Task - A task that needs to be done. MDEV-11068 Review which innodb_compression_algorithm to support in binary packages

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. MDEV-12226 Avoid writes of freed (garbage) pages to InnoDB data files

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-12699 Improve crash recovery of corrupted data pages

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-16796 TRUNCATE TABLE slowdown with innodb_file_per_table=ON

          • Major - Major loss of function.
          • Closed

          Task - A task that needs to be done. MDEV-18698 Show InnoDB's internal background threads in SHOW ENGINE INNODB STATUS

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. MDEV-20813 Assertion `!srv_safe_truncate || !newest_lsn || fil_page_get_type(page)' or `!newest_lsn || fil_page_get_type(page)' failed in buf_flush_init_for_writing

          • Major - Major loss of function.
          • Closed

            Activity

              People

              Assignee:
              thiru Thirunarayanan Balathandayuthapani
              Reporter:
              marko Marko Mäkelä
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                Dates

                Created:
                Updated:
                Resolved: