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Plesk 10.3 disappearing after changing my.cnf

Discussion in 'Plesk 10.x for Linux Issues, Fixes, How-To' started by scanmaster, Oct 26, 2011.

  1. scanmaster

    scanmaster Guest


    I copied my-huge.cnf to my.cnf in /etc as I needed support for large innodb tables. After I copied it I tried to restart MySQL but it wouldn't restart. Found a fix on the net which was:

    mv /var/lib/mysql/ib_logfile0 /var/lib/mysql/ib_logfile0.bak
    mv /var/lib/mysql/ib_logfile1 /var/lib/mysql/ib_logfile1.bak

    MySQL started no problem after this but my control panel just showed a blank screen. Tried clearing the browser cache which didn't work and then restarted the server. The server starts OK but still have a blank screen in the control panel.

    Before I restarted the server I tried copying my.cnf to httpdocs so I could copy and paste it here but it said there was 'no space left on the device'. It copied OK after the reboot though.

    Here's the my.cnf file:

    # Example MySQL config file for very large systems.
    # This is for a large system with memory of 1G-2G where the system runs mainly
    # MySQL.
    # You can copy this file to
    # /etc/my.cnf to set global options,
    # mysql-data-dir/my.cnf to set server-specific options (in this
    # installation this directory is /var/lib/mysql) or
    # ~/.my.cnf to set user-specific options.
    # In this file, you can use all long options that a program supports.
    # If you want to know which options a program supports, run the program
    # with the "--help" option.

    # The following options will be passed to all MySQL clients
    #password = your_password
    port = 3306
    socket = /var/lib/mysql/mysql.sock

    # Here follows entries for some specific programs

    # The MySQL server
    port = 3306
    socket = /var/lib/mysql/mysql.sock
    key_buffer = 384M
    max_allowed_packet = 128M
    table_cache = 512
    sort_buffer_size = 2M
    read_buffer_size = 2M
    read_rnd_buffer_size = 8M
    myisam_sort_buffer_size = 64M
    thread_cache_size = 8
    query_cache_size = 32M
    # Try number of CPU's*2 for thread_concurrency
    thread_concurrency = 8

    # Don't listen on a TCP/IP port at all. This can be a security enhancement,
    # if all processes that need to connect to mysqld run on the same host.
    # All interaction with mysqld must be made via Unix sockets or named pipes.
    # Note that using this option without enabling named pipes on Windows
    # (via the "enable-named-pipe" option) will render mysqld useless!

    # Disable Federated by default

    # Replication Master Server (default)
    # binary logging is required for replication

    # required unique id between 1 and 2^32 - 1
    # defaults to 1 if master-host is not set
    # but will not function as a master if omitted
    server-id = 1

    # Replication Slave (comment out master section to use this)
    # To configure this host as a replication slave, you can choose between
    # two methods :
    # 1) Use the CHANGE MASTER TO command (fully described in our manual) -
    # the syntax is:
    # MASTER_USER=<user>, MASTER_PASSWORD=<password> ;
    # where you replace <host>, <user>, <password> by quoted strings and
    # <port> by the master's port number (3306 by default).
    # Example:
    # CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,
    # MASTER_USER='joe', MASTER_PASSWORD='secret';
    # OR
    # 2) Set the variables below. However, in case you choose this method, then
    # start replication for the first time (even unsuccessfully, for example
    # if you mistyped the password in master-password and the slave fails to
    # connect), the slave will create a master.info file, and any later
    # change in this file to the variables' values below will be ignored and
    # overridden by the content of the master.info file, unless you shutdown
    # the slave server, delete master.info and restart the slaver server.
    # For that reason, you may want to leave the lines below untouched
    # (commented) and instead use CHANGE MASTER TO (see above)
    # required unique id between 2 and 2^32 - 1
    # (and different from the master)
    # defaults to 2 if master-host is set
    # but will not function as a slave if omitted
    #server-id = 2
    # The replication master for this slave - required
    #master-host = <hostname>
    # The username the slave will use for authentication when connecting
    # to the master - required
    #master-user = <username>
    # The password the slave will authenticate with when connecting to
    # the master - required
    #master-password = <password>
    # The port the master is listening on.
    # optional - defaults to 3306
    #master-port = <port>
    # binary logging - not required for slaves, but recommended

    # Point the following paths to different dedicated disks
    #tmpdir = /tmp/
    #log-update = /path-to-dedicated-directory/hostname

    # Uncomment the following if you are using BDB tables
    #bdb_cache_size = 384M
    #bdb_max_lock = 100000

    # Uncomment the following if you are using InnoDB tables
    innodb_data_home_dir = /var/lib/mysql/
    innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend
    innodb_log_group_home_dir = /var/lib/mysql/
    innodb_log_arch_dir = /var/lib/mysql/
    # You can set .._buffer_pool_size up to 50 - 80 %
    # of RAM but beware of setting memory usage too high
    innodb_buffer_pool_size = 1G
    #innodb_additional_mem_pool_size = 20M
    # Set .._log_file_size to 25 % of buffer pool size
    #innodb_log_file_size = 100M
    #innodb_log_buffer_size = 8M
    #innodb_flush_log_at_trx_commit = 1
    #innodb_lock_wait_timeout = 50

    max_allowed_packet = 16M

    # Remove the next comment character if you are not familiar with SQL

    key_buffer = 256M
    sort_buffer_size = 256M
    read_buffer = 2M
    write_buffer = 2M

    key_buffer = 256M
    sort_buffer_size = 256M
    read_buffer = 2M
    write_buffer = 2M


    Hope someone can help! :)

    Edit: forgot to mention the server is Centos 5.7, PHP 5.3, MySQL 5.0.77.
    Last edited by a moderator: Oct 26, 2011
  2. Faris Raouf

    Faris Raouf Silver Pleskian Plesk Guru

    Mar 15, 2009
    Likes Received:
    'no space left on the device' implies that you are out of disk space, and this is likely to be causing all sorts of problems. So before you look for a problem elsewhere, first check that you have plenty of free disk space!
  3. scanmaster

    scanmaster Guest

    got 2 x 500 MB drives which really doesn't make a difference! The innodb tables still do not work whether I have the space or not!!!!
  4. Faris Raouf

    Faris Raouf Silver Pleskian Plesk Guru

    Mar 15, 2009
    Likes Received:
    I still suspect the possibility of some damage due to lack of disk space, or at least being unable to write to disk. You would not have got that 'no space left on the device' if all was well at the time.

    Have you checked your plesk server admin log? (and other logs too, just in case). If all your logs are clean and you are still getting nowhere then maybe check all your databases with mysqlcheck. Also do a full disk check, just in case.

    Of course it will hopefully be something really really simple and nothing to do with any of the above, but it is kind of difficult to diagnose from here. In fact to be honest I'm hoping you'll find something in the plesk logs, and that said log entry will point you in the direction of something easy to repair.

  5. scanmaster

    scanmaster Guest

    It looks like the problem came about when I moved my-huge.cnf to my.cnf. The log file size was different which I have found out since means that it will corrupt previously created innodb tables.

    In my case, an engineer from 1 & 1 went in and got the Plesk panel working again but in so doing, deleted the database I had created (I have backups though). As the site I'm building is still under development, I decided to re-image the server and start afresh but I'm very wary about changing the my.cnf file as I'm not sure if the Plesk Panel creates innodb tables of its own (therefore, I wouldn't be able to change the log file size).