Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-18487

Memory usage growing until server crash

    XMLWordPrintable

Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Not a Bug
    • 10.3.12
    • N/A
    • MariaDB server v10.3.12 - 32 bits for Windows

      Installed on : Windows Server 2016 64 bit, Intel Xeon CPU e5-2620

    Description

      I am using MariaDB as a bridge for old databases that has only 32 bit ODBC drivers.

      So, I have create many tables in MariaDB using the CONNECT engine to point to thoses old databases.

      For example:
      CREATE TABLE customer ENGINE=CONNECT CONNECTION='DSN=AcombaStructure' TABLE_TYPE='ODBC' TABNAME='Customer' OPTION_LIST='readonly=yes'

      I have also created a "send command to ODBC data source" table as per documentation of the CONNECT engine.

      Through a .NET program, I open the connection, send SELECT requests or Update / Insert requests to the special "send command to ODBC data source" table. Then close the connection. Memory usage by the "mysqld" process on the Windows server just keep on growing. Even simple SELECT request through MySQL Workbench does the same thing on memory.

      I have tried with MySQL ODBC driver and MariaDB ODBC driver.... same situation of memory not released.

      That leads to the MariaDB server crashing.

      I haven't changed anything in the MariaDB config file, default values from the installation are used.

      I am joining a partial error log file.

      Attachments

        1. Log MariaDB.txt
          4 kB
        2. setup for testing.jpg
          setup for testing.jpg
          77 kB
        3. In Mariadb 1 of 2.jpg
          In Mariadb 1 of 2.jpg
          93 kB
        4. In Mariadb 2 of 2.jpg
          In Mariadb 2 of 2.jpg
          76 kB
        5. tblfourn on MySQL server.jpg
          tblfourn on MySQL server.jpg
          269 kB
        6. Call 2 - MySQL.txt
          12 kB
        7. Local MariaDB schema.jpg
          Local MariaDB schema.jpg
          35 kB
        8. Local MariaDB table.jpg
          Local MariaDB table.jpg
          78 kB
        9. ODBC MySQL DSN setup.jpg
          ODBC MySQL DSN setup.jpg
          176 kB
        10. Remote MySQL schema.jpg
          Remote MySQL schema.jpg
          35 kB
        11. Remote MySQL table.jpg
          Remote MySQL table.jpg
          89 kB
        12. create local CONNECT table MariaDB.txt
          0.2 kB
        13. create remote InnoDB table MySQL.txt
          0.1 kB
        14. local MariaDB my.ini
          0.2 kB
        15. remote MySQL my.ini
          0.6 kB

        Activity

          People

            bertrandop Olivier Bertrand
            PatSav Pat Sav
            Votes:
            0 Vote for this issue
            Watchers:
            3 Start watching this issue

            Dates

              Created:
              Updated:
              Resolved:

              Git Integration

                Error rendering 'com.xiplink.jira.git.jira_git_plugin:git-issue-webpanel'. Please contact your Jira administrators.