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mysql tweaking, the usual :)

Published by: smith 2009-01-07
  • Ive got a fresh install of mysql on an ensim box from a dedicated provider. God i wish i didnt go with ensim :(

    Anyway, its a 2.0ghz P4, 512mb ram.

    Running RedHat7.3. (i havent had any problems with peformance, regarding apache and php)

    Mysql loves to go away :

    My.cnf =
    [mysqld]
    datadir=/var/lib/mysql
    socket=/var/lib/mysql/mysql.sock

    [mysql.server]
    user=mysql
    basedir=/var/lib

    [safe_mysqld]
    err-log=/var/log/mysqld.log
    pid-file=/var/run/mysqld/mysqld.pid


    Extended Status

    +--------------------------+---------+
    Variable_name Value
    +--------------------------+---------+
    Aborted_clients 4
    Aborted_connects 13
    Bytes_received 1884112
    Bytes_sent 9352914
    Connections 119
    Created_tmp_disk_tables 2
    Created_tmp_tables 71
    Created_tmp_files 0
    Delayed_insert_threads 0
    Delayed_writes 0
    Delayed_errors 0
    Flush_commands 1
    Handler_delete 93
    Handler_read_first 899
    Handler_read_key 24469
    Handler_read_next 11710
    Handler_read_prev 0
    Handler_read_rnd 23636
    Handler_read_rnd_next 36313
    Handler_update 292
    Handler_write 7918
    Key_blocks_used 120
    Key_read_requests 156658
    Key_reads 5
    Key_write_requests 8529
    Key_writes 1473
    Max_used_connections 12
    Not_flushed_key_blocks 0
    Not_flushed_delayed_rows 0
    Open_tables 45
    Open_files 87
    Open_streams 0
    Opened_tables 130
    Questions 5875
    Select_full_join 50
    Select_full_range_join 0
    Select_range 463
    Select_range_check 0
    Select_scan 902
    Slave_running OFF
    Slave_open_temp_tables 0
    Slow_launch_threads 0
    Tweaking the style of child elements inline - bytes::
    6 posts - Last post: Mar 2, 2008we can do this as usual: <style type="text/css"> li{margin: 0;} </style> Thank you. . Default Re: Tweaking the style , Mr. Korpela
    http://bytes.com/groups/html/777378-tweaking-style-child-elements-inline
    HOME
    Slow_queries 0
    Sort_merge_passes 0
    Sort_range 463
    Sort_rows 23636
    Sort_scan 527
    Table_locks_immediate 5661
    Table_locks_waited 0
    Threads_cached 0
    Threads_created 118
    Threads_connected 11
    Threads_running 1
    Uptime 118466
    +--------------------------+---------+


    Hopefully thats enough information to allow a decent my.cnf?

    Or are there just some simple my.cnf options to allow a longer "Waiting" period before running away? :rolleyes:


  • Hrm, after a bit of mucking around, this seems to not work ?? :confused: :confused:

    I am running mysql 4, so i guess thats the problem.

    Where can i find an error log? :


  • Originally posted by merk
    I tried quite a few different combinations of using the default config files supplied with mysql, medium, large, huge.

    All 3 of those, 'MySQL has gone away' when i issue a mysql -uusername -p database < sql.file (the file is over 20mb)

    Im just installing mysql3, maybe that might sort my problem, but is there some sort of trick if you want to load a sql dump > 20mb? you sure you have restarted mysql after changing my.cnf files ? gone away usually means either wait_time is too short or max_allowed_packet is less than 16MB in mysql 3.23.x
  • AMX Mod Install Guide::
    The mysql.cfg file in your addons\amx\config folder stores the information AMX Of course you can tweak this all if you feel like you can modify the
    http://amxmod.net/doc/?p=amxmysql
    HOME
    MySQL :: Re: Compiling MySQL using Rational Purify for Pentium.::
    3 posts - Last post: Feb 20, 2007Recommended Servers for MySQL to the parameter that your usual script does have, so you may wish to tweak that to suit your needs.
    http://forums.mysql.com/read.php?132,135593,140884
    HOME


  • Okay you can go back to ignoring me. :(

    /me hides in his corner.:rolleyes:


  • He must have been visiting my site prior to the move :)

    Our old host had a constant load of around 35, which triggered me getting a ded host.

    But i dont think my server could handle martz's site, he uses too much b/w !


  • I tried quite a few different combinations of using the default config files supplied with mysql, medium, large, huge.

    All 3 of those, 'MySQL has gone away' when i issue a mysql -uusername -p database < sql.file (the file is over 20mb)

    Im just installing mysql3, maybe that might sort my problem, but is there some sort of trick if you want to load a sql dump > 20mb?


  • Originally posted by merk
    Hrm, after a bit of mucking around, this seems to not work ?? :confused: :confused:

    I am running mysql 4, so i guess thats the problem.

    Where can i find an error log? : did you restart mysql ? i recommend you downgrade to mysql 3.23.53a as vB is meant to work with 3.23.x


  • you both on same server ?


  • Originally posted by merk
    He must have been visiting my site prior to the move :)

    Our old host had a constant load of around 35, which triggered me getting a ded host.

    But i dont think my server could handle martz's site, he uses too much b/w ! okay i see :)


  • i could of warned ya about ensim ;)

    replace my.cnf with below and restart mysql


    [mysqld]
    datadir=/var/lib/mysql
    socket=/var/lib/mysql/mysql.sock
    set-variable = max_connections=450
    set-variable = key_buffer=16M
    set-variable = myisam_sort_buffer_size=64M
    set-variable = join_buffer=1M
    set-variable = record_buffer=1M
    set-variable = sort_buffer=2M
    set-variable = table_cache=1024
    set-variable = thread_cache_size=256
    set-variable = wait_timeout=9600
    set-variable = connect_timeout=10
    set-variable = max_allowed_packet=16M
    set-variable = max_connect_errors=10

    [mysql.server]
    user=mysql
    basedir=/var/lib

    [safe_mysqld]
    err-log=/var/log/mysqld.log
    pid-file=/var/run/mysqld/mysqld.pid
    open_files_limit=8192

    [mysqldump]
    quick
    set-variable = max_allowed_packet=16M

    [myisamchk]
    set-variable = key_buffer=64M
    set-variable = sort_buffer=64M
    set-variable = read_buffer=16M
    set-variable = write_buffer=16M


  • It was reasonably easy to get rid of, luckily someone wrote a sh script that does it automatically ;)

    Thanks for that too. Hopefully soon (since i screwed up bind) when they get my server back online ill be able to test it! :(

    eva2000, the legend.


  • Yeh, all is sorted now, my main problem was i wasnt checking /var/log/mysql.log.

    the /var/mysql paths you gave me (or was it /var/lib/?), didnt exist, and the databases were actually in /usr/local/mysql/var(as per default install instructions in the mysql manual)

    So i just took out those variables in your my.cnf, and she worked.

    Thanks for the help :)

    (and yeh, i did restart mysql, many times, i even tried rebooting the server :)


  • Originally posted by merk
    Yeh, all is sorted now, my main problem was i wasnt checking /var/log/mysql.log.

    the /var/mysql paths you gave me (or was it /var/lib/?), didnt exist, and the databases were actually in /usr/local/mysql/var(as per default install instructions in the mysql manual)

    So i just took out those variables in your my.cnf, and she worked.

    Thanks for the help :)

    (and yeh, i did restart mysql, many times, i even tried rebooting the server :) ah strange the paths i used were based on your originally posted my.cnf ** shrugs *** oh well good to see it working now :)


  • Hopefully this has sorted out my "mysql connections exceeded" problem too, perisistant connections turned off didnt help :]


  • thanks for the help eva, i think that my.cnf came from ensims mysql.





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