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Help with Percona configuration

Discussion in 'Server Configuration and Hosting' started by dbembibre, Aug 13, 2013.

  1. dbembibre

    dbembibre Active Member

    I have a dedicated DB server, that is not swapping but i think that can be faster. Is a dedicated DB server with Percona 5.5 and Elastic search installed on it. The JVM is configured to take 512MB

    8 Cores
    Intel(R) Xeon(R) CPU          E5410  @ 2.33GHz
    16 GB of Ram

    SCSI disk 15RPM
    [root@back daniel]# /usr/sbin/lshw -class disk -class storage
          description: RAID bus controller
          product: MegaRAID SAS 1078
          vendor: LSI Logic / Symbios Logic
          physical id: 0
          bus info: pci@0000:01:00.0
          logical name: scsi0
          version: 04
          width: 64 bits
          clock: 33MHz
          capabilities: storage pciexpress msi msix pm vpd bus_master cap_list
          configuration: driver=megaraid_sas latency=0 module=megaraid_sas
              description: SCSI Disk
              product: PERC 6/i
              vendor: DELL
              physical id: 2.0.0
              bus info: scsi@0:2.0.0
              logical name: /dev/sda
              version: 1.11
              serial: 002822d8031d72191000e5ead490ec01
              size: 136GiB (146GB)
              capabilities: partitioned partitioned:dos
              configuration: ansiversion=5 signature=00000080
    My mysql configuration

    max_allowed_packet            = 16M
    max_connect_errors            = 1000000
    max_connections = 500
    key_buffer_size                = 32M
    myisam_recover                = FORCE,BACKUP
    # SAFETY #
    max_allowed_packet            = 16M
    max_connect_errors            = 1000000
    back_log = 50
    max_connections = 300
    join_buffer_size              = 64M
    read_buffer_size              = 2M
    sort_buffer_size              = 8M
    tmp_table_size                = 256M
    max_heap_table_size            = 256M
    query_cache_type              = 1
    query_cache_size              = 64M
    thread_cache_size              = 512
    open_files_limit              = 65535
    table_definition_cache        = 8000
    table_open_cache              = 8000
    expire_logs_days              = 14
    sync_binlog                    = 1
    innodb_read_ahead = none
    innodb_thread_concurrency = 4
    innodb_flush_method  = O_DIRECT
    innodb_log_files_in_group  = 2
    innodb_log_file_size  = 256M
    innodb_flush_log_at_trx_commit = 2
    innodb_file_per_table  = 1
    innodb_buffer_pool_size  = 10G
    innodb_additional_mem_pool_size = 32M
    innodb_io_capacity = 2000
    innodb_read_io_threads = 4
    innodb_write_io_threads = 2
  2. MattW

    MattW Well-Known Member

    Percona config looks OK TBH.

    Would probably see a decent benefit swapping the 15K disk to an SSD though.
  3. dbembibre

    dbembibre Active Member

    Yes an SSD can help a lot, but i think that i found my problem. I have max_connections to 600 i have around 1000 users online, but mysql show that max connections was reached. Max connections opened 601.

    Aborted clients 599
    Aborted connects 1.2 k

    I only have installed xentrader, enhanced search, xenresources, tapatalk and sitemap, any idea ?
    I think that one of this addons is not closed properly the mysql connections

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