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Displaying posts with tag: MariaDB 10.1 (reset)

MariaDB 10.1.1: Compound statements
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Every now and then there is a need to execute certain SQL statements conditionally. Easy, if you do it from your PHP (or Java or whatever) application. But if all you have is pure SQL? There are two techniques that MariaDB and MySQL use in the mysql_fix_privilege_tables.sql script (applied by mysql_upgrade tool).

  • Create a stored procedure with IF statements inside, call it once and drop it. This requires the user to have the CREATE ROUTINE privilege and mysql.proc table must exist and be usable (which is not necessarily true — we’re doing it from mysql_upgrade, right?).
  • Use dynamic SQL, like
    SET @str = IF (@have_csv = 'YES',
                   'CREATE TABLE IF NOT EXISTS general_log (
                      event_time TIMESTAMP(6) NOT NULL,
                      user_host MEDIUMTEXT NOT NULL,

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    MariaDB 10.1.1: no more .frm’s for performance_schema tables
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    Yes! In MariaDB 10.1.1 tables in PERFORMANCE_SCHEMA do not use .frm files. These files are not created, not read — in fact, PERFORMANCE_SCHEMA tables never touch the disk at all.

    This became possible due to a lesser-known feature of MariaDB — new table discovery (“old table discovery” was implemented in MySQL for NDB Cluster in 2004), implemented in MariaDB 10.0.2. Instead of reading and parsing .frm files, MariaDB simply asks PERFORMANCE_SCHEMA table, what structure it has, and because these tables always have a fixed structure, the table directly returns it to MariaDB with no need for any external data dictionary.

    It also means, you never need to upgrade PERFORMANCE_SCHEMA tables, they

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    Performance evaluation of MariaDB 10.1 and MySQL 5.7.4-labs-tplc
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    Introduction

    Evaluating the performance of database systems is a very demanding task. There are a lot of hard choices to be made, e.g.:

    • What operating system and operating system version is to be used
    • What configuration setup is to be used
    • What benchmarks are to be used and how long are the warm-up and measure times
    • What test setups are to be used
    • What version of the database management system is used
    • What storage engine is used

    While performance evaluation is mostly machine time, there is still a lot of hard work for the human monitoring the tests. In this blog post we have made following choices:

    • We’re using an Intel Xeon E5-2690 @ 2.9GHz CPU containing 32-cores and Linux 3.4.12 with 132G main memory. The database is stored on a Fusion-IO ioDrive2 Duo 2.41TB
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    MariaDB 10.1.0 Overview and Highlights
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    MariaDB 10.1.0 was recently released, and is available for download here:

    https://downloads.mariadb.org/mariadb/10.1.0/

    This is the first alpha release of MariaDB 10.1, so there are a lot of new changes and functionalities added, which cover a wide variety of areas such as: Performance, InnoDB/XtraDB, WebScaleSQL, Optimizer, Security, Storage Engine functionality, & Administration Improvements.

    These are 9 of the most notable changes in MariaDB 10.1.0 (but do check out the release notes and changelogs below for the full list of changes):

  • InnoDB: Allow > 16K pages on InnoDB – InnoDB now allows page size to be configured as 16K, 32K and 64K. Note that
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    MariaDB moves development to Github
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    Today marks a milestone in terms of the MariaDB project – going forward, the MariaDB project plans to use Github and git for source code management. The migration happens from Launchpad and the bzr tool.

    The 10.1 server development (under heavy development now) will happen on Github. You can check it out here: https://github.com/MariaDB/server. Feel free to watch, star or even fork the code, and send us contributions!

    Previous maria-captains should now provide their Github IDs so that they can be accorded similar status. Send the IDs to the maria-developers mailing list.

    The project eventually wants to move the 10.0, 5.5, 5.3, 5.2, and

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    What do you want to see in MariaDB 10.1?
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    Last night, after my previous blog post, everyone in attendance at the SkySQL developer meeting in Barcelona gathered for dinner at El Cangrejo Loco, which, if my High School Spanish is working, translates as The Crazy Crab. After the excellent food, the tradition of singing at MySQL/MariaDB developer meetings was preserved.

    Today the MariaDB developers in attendance at the SkySQL developer meeting in Barcelona got together to work on plans for MariaDB 10.1. We also paused for a group photo:

    Many tasks have been identified for possible inclusion in 10.1. Some have already been marked as such in JIRA. A summary is

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