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  1. #1
    Join Date
    May 2009
    Location
    Vaduz/LI
    Posts
    2,778

    Question MySQL Optimization?

    Does anyone know how i could optimize this my.cnf?
    The Server Runs with 512Mb Ram (+ 512Mb Shared), i would Upgrade to 1024 + 1024Mb Shared if needed.


    Code:
    #
    # The MySQL database server configuration file.
    #
    # You can copy this to one of:
    # - "/etc/mysql/my.cnf" to set global options,
    # - "~/.my.cnf" to set user-specific options.
    # 
    # One can use all long options that the program supports.
    # Run program with --help to get a list of available options and with
    # --print-defaults to see which it would actually understand and use.
    #
    # For explanations see
    # http://dev.mysql.com/doc/mysql/en/server-system-variables.html
    
    # This will be passed to all mysql clients
    # It has been reported that passwords should be enclosed with ticks/quotes
    # escpecially if they contain "#" chars...
    # Remember to edit /etc/mysql/debian.cnf when changing the socket location.
    [client]
    port		= 3306
    socket		= /var/run/mysqld/mysqld.sock
    
    # Here is entries for some specific programs
    # The following values assume you have at least 32M ram
    
    # This was formally known as [safe_mysqld]. Both versions are currently parsed.
    [mysqld_safe]
    socket		= /var/run/mysqld/mysqld.sock
    nice		= 0
    
    [mysqld]
    #
    # * Basic Settings
    #
    user		= mysql
    pid-file	= /var/run/mysqld/mysqld.pid
    socket		= /var/run/mysqld/mysqld.sock
    port		= 3306
    basedir		= /usr
    datadir		= /var/lib/mysql
    tmpdir		= /var/tmp
    language	= /usr/share/mysql/english
    skip-locking
    key_buffer_size = 400M
    sort_buffer_size = 38M
    read_buffer_size = 38M
    myisam_sort_buffer_size = 1024M
    thread_cache_size = 38M
    query_cache_size = 8
    thread_concurrency = 8
    
    #
    # Instead of skip-networking the default is now to listen only on
    # localhost which is more compatible and is not less secure.
    bind-address		= MYIP
    #
    # * Fine Tuning
    #
    key_buffer		= 400M
    max_allowed_packet	= 38M
    thread_stack		= 1024K
    thread_cache_size	= 8
    # This replaces the startup script and checks MyISAM tables if needed
    # the first time they are touched
    myisam-recover		= BACKUP
    #max_connections        = 100
    #table_cache            = 64
    #thread_concurrency     = 10
    #
    # * Query Cache Configuration
    #
    query_cache_limit       = 4M
    query_cache_size        = 8M
    #
    # * Logging and Replication
    #
    # Both location gets rotated by the cronjob.
    # Be aware that this log type is a performance killer.
    #log		= /var/log/mysql/mysql.log
    #
    # Error logging goes to syslog. This is a Debian improvement :)
    #
    # Here you can see queries with especially long duration
    #log_slow_queries	= /var/log/mysql/mysql-slow.log
    #long_query_time = 2
    #log-queries-not-using-indexes
    #
    # The following can be used as easy to replay backup logs or for replication.
    # note: if you are setting up a replication slave, see README.Debian about
    #       other settings you may need to change.
    #server-id		= 1
    #log_bin			= /var/log/mysql/mysql-bin.log
    expire_logs_days	= 7
    max_binlog_size         = 100M
    #binlog_do_db		= include_database_name
    #binlog_ignore_db	= include_database_name
    #
    # * BerkeleyDB
    #
    # Using BerkeleyDB is now discouraged as its support will cease in 5.1.12.
    skip-bdb
    #
    # * InnoDB
    #
    # InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
    # Read the manual for more InnoDB related options. There are many!
    # You might want to disable InnoDB to shrink the mysqld process by circa 100MB.
    skip-innodb
    #
    # * Security Features
    #
    # Read the manual, too, if you want chroot!
    # chroot = /var/lib/mysql/
    #
    # For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
    #
    # ssl-ca=/etc/mysql/cacert.pem
    # ssl-cert=/etc/mysql/server-cert.pem
    # ssl-key=/etc/mysql/server-key.pem
    
    
    
    [mysqldump]
    quick
    quote-names
    max_allowed_packet	= 32M
    
    [mysql]
    #no-auto-rehash	# faster start of mysql but no tab completition
    
    [isamchk]
    key_buffer		= 400M
    
    #
    # * NDB Cluster
    #
    # See /usr/share/doc/mysql-server-*/README.Debian for more information.
    #
    # The following configuration is read by the NDB Data Nodes (ndbd processes)
    # not from the NDB Management Nodes (ndb_mgmd processes).
    #
    # [MYSQL_CLUSTER]
    # ndb-connectstring=127.0.0.1
    
    
    #
    # * IMPORTANT: Additional settings that can override those from this file!
    #   The files must end with '.cnf', otherwise they'll be ignored.
    #
    !includedir /etc/mysql/conf.d/
    The DB running behind that is roughly 1Gb Big, 3 Tables:
    1 - 3,5mil entrys - Layout: http://www.abload.de/img/unbenanntw6ar.png
    2 - 1,8k entrys - Layout: http://www.abload.de/img/unbenanntbuyg.png
    3 - 103k entrys - Layout: http://www.abload.de/img/unbenanntbuyg.png (same as Table 2)

    The Insert for the Main table is as follows:
    Code:
    CREATE TABLE IF NOT EXISTS `table1` (
      `releaseid` int(11) NOT NULL auto_increment,
      `time` int(11) NOT NULL,
      `section` varchar(50) collate utf8_unicode_ci NOT NULL,
      `release` varchar(255) collate utf8_unicode_ci NOT NULL,
      `genre` varchar(100) collate utf8_unicode_ci NOT NULL default '',
      `isnuked` tinyint(1) NOT NULL default '0',
      `isdeleted` tinyint(1) NOT NULL default '0',
      `files` int(11) NOT NULL default '0',
      `size` double NOT NULL default '0',
      PRIMARY KEY  (`releaseid`),
      UNIQUE KEY `release` (`release`),
      FULLTEXT KEY `fullrelease` (`release`)
    ) ENGINE=MyISAM  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci COMMENT='releases' AUTO_INCREMENT=3739826 ;
    A specific request takes around 0,25s:
    Code:
    SELECT *
    FROM `table1`
    WHERE `release` = 'Shad-Sunshad-FR'
    LIMIT 0 , 30
    = 0.2478 sec.

    A %german% generic request way longer with 0,42:
    Code:
    SELECT *
    FROM `02b67c3eae678dc49209d6de4709a171`
    WHERE `release` LIKE '%german%'
    LIMIT 0 , 30
    Tl;dr: Help me with this MySQL Databse please if you can

  2. #2
    You should upgrade to dedicated
    I/O Hard Drive on VPS very high latency
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  3. #3
    Join Date
    May 2009
    Location
    Vaduz/LI
    Posts
    2,778
    Used dedicated too, does not give better performance - so i guess my my.cnf is not good.

  4. #4
    Well I feel you need to optimize your database as well as the my.cnf
    Hillock Hosting
    Unlimited Hosting Solution
    Reliable Shared | Reseller| VPS Hosting Services

  5. #5
    Join Date
    Mar 2003
    Location
    California USA
    Posts
    13,681
    If your database does not use indexes correctly, nothing you do to your my.cnf will fix it.

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