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MySQL Optimization

Posted: Mon Apr 05, 2010 7:49 pm
by kocinski
Hi,

This is my MySQL settings, any recommend for optimize it?

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# MySQL Server Instance Configuration File# ----------------------------------------------------------------------# Generated by the MySQL Server Instance Configuration Wizard### Installation Instructions# ----------------------------------------------------------------------## On Linux you can copy this file to /etc/my.cnf to set global options,# mysql-data-dir/my.cnf to set server-specific options# (@localstatedir@ for this installation) or to# ~/.my.cnf to set user-specific options.## On Windows you should keep this file in the installation directory # of your server (e.g. C:\Program Files\MySQL\MySQL Server X.Y). To# make sure the server reads the config file use the startup option # "--defaults-file". ## To run run the server from the command line, execute this in a # command line shell, e.g.# mysqld --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"## To install the server as a Windows service manually, execute this in a # command line shell, e.g.# mysqld --install MySQLXY --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"## And then execute this in a command line shell to start the server, e.g.# net start MySQLXY### Guildlines for editing this file# ----------------------------------------------------------------------## In this file, you can use all long options that the program supports.# If you want to know the options a program supports, start the program# with the "--help" option.## More detailed information about the individual options can also be# found in the manual.### CLIENT SECTION# ----------------------------------------------------------------------## The following options will be read by MySQL client applications.# Note that only client applications shipped by MySQL are guaranteed# to read this section. If you want your own MySQL client program to# honor these values, you need to specify it as an option during the# MySQL client library initialization.#[client] port=xxxx [mysql] default-character-set=utf8  # SERVER SECTION# ----------------------------------------------------------------------## The following options will be read by the MySQL Server. Make sure that# you have installed the server correctly (see above) so it reads this # file.#[mysqld] # The TCP/IP Port the MySQL Server will listen onport=xxxx skip-name-resolvememlock  #Path to installation directory. All paths are usually resolved relative to this.basedir="S:/" #Path to the database rootdatadir="S:/Data/" # The default character set that will be used when a new schema or table is# created and no character set is defineddefault-character-set=utf8 # The default storage engine that will be used when create new tables whendefault-storage-engine=INNODB # Set the SQL mode to strictsql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION" # The maximum amount of concurrent sessions the MySQL server will# allow. One of these connections will be reserved for a user with# SUPER privileges to allow the administrator to login even if the# connection limit has been reached.max_connections=800 # Query cache is used to cache SELECT results and later return them# without actual executing the same query once again. Having the query# cache enabled may result in significant speed improvements, if your# have a lot of identical queries and rarely changing tables. See the# "Qcache_lowmem_prunes" status variable to check if the current value# is high enough for your load.# Note: In case your tables change very often or if your queries are# textually different every time, the query cache may result in a# slowdown instead of a performance improvement.query_cache_size=0 # The number of open tables for all threads. Increasing this value# increases the number of file descriptors that mysqld requires.# Therefore you have to make sure to set the amount of open files# allowed to at least 4096 in the variable "open-files-limit" in# section [mysqld_safe]table_cache=1520 # Maximum size for internal (in-memory) temporary tables. If a table# grows larger than this value, it is automatically converted to disk# based table This limitation is for a single table. There can be many# of them.tmp_table_size=256M  # How many threads we should keep in a cache for reuse. When a client# disconnects, the client's threads are put in the cache if there aren't# more than thread_cache_size threads from before.  This greatly reduces# the amount of thread creations needed if you have a lot of new# connections. (Normally this doesn't give a notable performance# improvement if you have a good thread implementation.)thread_cache_size=38 #*** MyISAM Specific options # The maximum size of the temporary file MySQL is allowed to use while# recreating the index (during REPAIR, ALTER TABLE or LOAD DATA INFILE.# If the file-size would be bigger than this, the index will be created# through the key cache (which is slower).myisam_max_sort_file_size=100G # If the temporary file used for fast index creation would be bigger# than using the key cache by the amount specified here, then prefer the# key cache method.  This is mainly used to force long character keys in# large tables to use the slower key cache method to create the index.myisam_sort_buffer_size=69M # Size of the Key Buffer, used to cache index blocks for MyISAM tables.# Do not set it larger than 30% of your available memory, as some memory# is also required by the OS to cache rows. Even if you're not using# MyISAM tables, you should still set it to 8-64M as it will also be# used for internal temporary disk tables.key_buffer_size=55M # Size of the buffer used for doing full table scans of MyISAM tables.# Allocated per thread, if a full scan is needed.read_buffer_size=64Kread_rnd_buffer_size=256K # This buffer is allocated when MySQL needs to rebuild the index in# REPAIR, OPTIMZE, ALTER table statements as well as in LOAD DATA INFILE# into an empty table. It is allocated per thread so be careful with# large settings.sort_buffer_size=256K  #*** INNODB Specific options ***  # Use this option if you have a MySQL server with InnoDB support enabled# but you do not plan to use it. This will save memory and disk space# and speed up some things.#skip-innodb # Additional memory pool that is used by InnoDB to store metadata# information.  If InnoDB requires more memory for this purpose it will# start to allocate it from the OS.  As this is fast enough on most# recent operating systems, you normally do not need to change this# value. SHOW INNODB STATUS will display the current amount used.innodb_additional_mem_pool_size=23M # If set to 1, InnoDB will flush (fsync) the transaction logs to the# disk at each commit, which offers full ACID behavior. If you are# willing to compromise this safety, and you are running small# transactions, you may set this to 0 or 2 to reduce disk I/O to the# logs. Value 0 means that the log is only written to the log file and# the log file flushed to disk approximately once per second. Value 2# means the log is written to the log file at each commit, but the log# file is only flushed to disk approximately once per second.innodb_flush_log_at_trx_commit=2 # The size of the buffer InnoDB uses for buffering log data. As soon as# it is full, InnoDB will have to flush it to disk. As it is flushed# once per second anyway, it does not make sense to have it very large# (even with long transactions).innodb_log_buffer_size=16M # InnoDB, unlike MyISAM, uses a buffer pool to cache both indexes and# row data. The bigger you set this the less disk I/O is needed to# access data in tables. On a dedicated database server you may set this# parameter up to 80% of the machine physical memory size. Do not set it# too large, though, because competition of the physical memory may# cause paging in the operating system.  Note that on 32bit systems you# might be limited to 2-3.5G of user level memory per process, so do not# set it too high.innodb_buffer_pool_size=1024M # Size of each log file in a log group. You should set the combined size# of log files to about 25%-100% of your buffer pool size to avoid# unneeded buffer pool flush activity on log file overwrite. However,# note that a larger logfile size will increase the time needed for the# recovery process.innodb_log_file_size=54M # Number of threads allowed inside the InnoDB kernel. The optimal value# depends highly on the application, hardware as well as the OS# scheduler properties. A too high value may lead to thread thrashing.innodb_thread_concurrency=60 
My dedicated Server RAM ammount is 12GB.

Thanks for your opinion

Re: MySQL Optimization

Posted: Sun May 02, 2010 6:56 am
by badboy29
I have same question :D

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-------- Performance Metrics -------------------------------------------------[--] Up for: 1d 11h 22m 53s (3M q [27.524 qps], 3K conn, TX: 587M, RX: 540M)[--] Reads / Writes: 13% / 87%[--] Total buffers: 1.5G global + 952.0K per thread (300 max threads)[OK] Maximum possible memory usage: 1.8G (23% of installed RAM)[OK] Slow queries: 0% (0/3M)[OK] Highest usage of available connections: 13% (41/300)[OK] Key buffer size / total MyISAM indexes: 350.0M/121.9M[OK] Key buffer hit rate: 99.4% (291K cached / 1K reads)[OK] Query cache efficiency: 43.1% (320K cached / 742K selects)[OK] Query cache prunes per day: 0[OK] Sorts requiring temporary tables: 0% (46 temp sorts / 29K sorts)[OK] Temporary tables created on disk: 4% (190 on disk / 4K total)[OK] Thread cache hit rate: 98% (41 created / 3K connections)[OK] Table cache hit rate: 97% (209 open / 215 opened)[OK] Open file limit used: 3% (206/6K)[OK] Table locks acquired immediately: 99% (3M immediate / 3M locks)[OK] InnoDB data size / buffer pool: 212.2M/350.0M -------- Recommendations -----------------------------------------------------No additional performance recommendations are available.
Running on Debian 5.0 x64, any recommendations or all fine ?