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  1. MariaDB Server
  2. MDEV-14602

Reduce malloc()/free() usage in InnoDB

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      Description

      I load backup to mariadb and break it. In processlist still present one killed thread:
      {code}
      show processlist;
      ---------------------------------------------------------------------------------------------------------

      Id User Host db Command Time State Info Progress

      ---------------------------------------------------------------------------------------------------------

      85 loader 10.10.16.216:43971 phonebook_storage Killed 1845 Unlocking tables NULL 0.000
      184 root localhost NULL Query 0 init show processlist 0.000

      ---------------------------------------------------------------------------------------------------------
      {code}
      In same time I run strace for mysqld and see many calls to madvise:
      {code}

      1. strace -ff -p 33080
        ...
        [pid 60412] madvise(0x7f36cb638000, 331776, MADV_DONTNEED) = 0
        [pid 60412] madvise(0x7f36cb441000, 135168, MADV_DONTNEED) = 0
        [pid 60412] madvise(0x7f36cb638000, 335872, MADV_DONTNEED) = 0
        [pid 60412] madvise(0x7f36cb441000, 135168, MADV_DONTNEED) = 0
        [pid 60412] madvise(0x7f36cb638000, 335872, MADV_DONTNEED) = 0
        [pid 60412] madvise(0x7f36cb441000, 135168, MADV_DONTNEED) = 0
        [pid 60412] madvise(0x7f36cb638000, 335872, MADV_DONTNEED) = 0
        {code}

      Table which been loading:
      {code}
      /*!40101 SET @saved_cs_client = @@character_set_client */;
      /*!40101 SET character_set_client = utf8 */;
      CREATE TABLE `contact` (
      `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
      `id_phonebook` int(10) unsigned NOT NULL DEFAULT '0',
      `id_user` int(10) unsigned NOT NULL DEFAULT '0',
      `firstname` varchar(255) NOT NULL DEFAULT '',
      `lastname` varchar(255) NOT NULL DEFAULT '',
      `local_key` varchar(255) NOT NULL DEFAULT '',
      PRIMARY KEY (`id`),
      KEY `id_phonebook` (`id_phonebook`) USING BTREE,
      KEY `id_user` (`id_user`) USING BTREE
      ) ENGINE=InnoDB AUTO_INCREMENT=133028725 DEFAULT CHARSET=utf8 ROW_FORMAT=COMPRESSED KEY_BLOCK_SIZE=2;
      /*!40101 SET character_set_client = @saved_cs_client */;
      {code}

        Attachments

        1. gdb.txt
          7 kB
        2. status.txt
          12 kB
        3. vars.txt
          16 kB

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              Assignee:
              marko Marko Mäkelä
              Reporter:
              chernomorets Sergey Chernomorets
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                Created:
                Updated:

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