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MySQL

Mar 7th, 2012
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  1. # MySQL Server Instance Configuration File
  2. # ----------------------------------------------------------------------
  3. # Generated by the MySQL Server Instance Configuration Wizard
  4. #
  5. #
  6. # Installation Instructions
  7. # ----------------------------------------------------------------------
  8. #
  9. # On Linux you can copy this file to /etc/my.cnf to set global options,
  10. # mysql-data-dir/my.cnf to set server-specific options
  11. # (@localstatedir@ for this installation) or to
  12. # ~/.my.cnf to set user-specific options.
  13. #
  14. # On Windows you should keep this file in the installation directory
  15. # of your server (e.g. C:\Program Files\MySQL\MySQL Server X.Y). To
  16. # make sure the server reads the config file use the startup option
  17. # "--defaults-file".
  18. #
  19. # To run run the server from the command line, execute this in a
  20. # command line shell, e.g.
  21. # mysqld --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"
  22. #
  23. # To install the server as a Windows service manually, execute this in a
  24. # command line shell, e.g.
  25. # mysqld --install MySQLXY --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"
  26. #
  27. # And then execute this in a command line shell to start the server, e.g.
  28. # net start MySQLXY
  29. #
  30. #
  31. # Guildlines for editing this file
  32. # ----------------------------------------------------------------------
  33. #
  34. # In this file, you can use all long options that the program supports.
  35. # If you want to know the options a program supports, start the program
  36. # with the "--help" option.
  37. #
  38. # More detailed information about the individual options can also be
  39. # found in the manual.
  40. #
  41. #
  42. # CLIENT SECTION
  43. # ----------------------------------------------------------------------
  44. #
  45. # The following options will be read by MySQL client applications.
  46. # Note that only client applications shipped by MySQL are guaranteed
  47. # to read this section. If you want your own MySQL client program to
  48. # honor these values, you need to specify it as an option during the
  49. # MySQL client library initialization.
  50. #
  51. [client]
  52.  
  53. port=149
  54.  
  55. [mysql]
  56.  
  57. default-character-set=latin1
  58.  
  59.  
  60. # SERVER SECTION
  61. # ----------------------------------------------------------------------
  62. #
  63. # The following options will be read by the MySQL Server. Make sure that
  64. # you have installed the server correctly (see above) so it reads this
  65. # file.
  66. #
  67. [mysqld]
  68.  
  69. # The TCP/IP Port the MySQL Server will listen on
  70. port=149
  71. wait_timeout = 1800
  72. log-slow-queries=1
  73.  
  74. #Path to installation directory. All paths are usually resolved relative to this.
  75. basedir="C:/Program Files/MySQL/MySQL Server 5.5/"
  76.  
  77. #Path to the database root
  78. datadir="C:/ProgramData/MySQL/MySQL Server 5.5/Data/"
  79.  
  80. # The default character set that will be used when a new schema or table is
  81. # created and no character set is defined
  82. character-set-server=latin1
  83.  
  84. # The default storage engine that will be used when create new tables when
  85. default-storage-engine=INNODB
  86.  
  87. # Set the SQL mode to strict
  88. sql-mode="NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
  89.  
  90. # The maximum amount of concurrent sessions the MySQL server will
  91. # allow. One of these connections will be reserved for a user with
  92. # SUPER privileges to allow the administrator to login even if the
  93. # connection limit has been reached.
  94. max_connections=5000
  95.  
  96. # Query cache is used to cache SELECT results and later return them
  97. # without actual executing the same query once again. Having the query
  98. # cache enabled may result in significant speed improvements, if your
  99. # have a lot of identical queries and rarely changing tables. See the
  100. # "Qcache_lowmem_prunes" status variable to check if the current value
  101. # is high enough for your load.
  102. # Note: In case your tables change very often or if your queries are
  103. # textually different every time, the query cache may result in a
  104. # slowdown instead of a performance improvement.
  105. query_cache_size=0
  106.  
  107. # The number of open tables for all threads. Increasing this value
  108. # increases the number of file descriptors that mysqld requires.
  109. # Therefore you have to make sure to set the amount of open files
  110. # allowed to at least 4096 in the variable "open-files-limit" in
  111. # section [mysqld_safe]
  112. table_cache=256
  113.  
  114. # Maximum size for internal (in-memory) temporary tables. If a table
  115. # grows larger than this value, it is automatically converted to disk
  116. # based table This limitation is for a single table. There can be many
  117. # of them.
  118. tmp_table_size=35M
  119.  
  120.  
  121. # How many threads we should keep in a cache for reuse. When a client
  122. # disconnects, the client's threads are put in the cache if there aren't
  123. # more than thread_cache_size threads from before. This greatly reduces
  124. # the amount of thread creations needed if you have a lot of new
  125. # connections. (Normally this doesn't give a notable performance
  126. # improvement if you have a good thread implementation.)
  127. thread_cache_size=8
  128.  
  129. #*** MyISAM Specific options
  130.  
  131. # The maximum size of the temporary file MySQL is allowed to use while
  132. # recreating the index (during REPAIR, ALTER TABLE or LOAD DATA INFILE.
  133. # If the file-size would be bigger than this, the index will be created
  134. # through the key cache (which is slower).
  135. myisam_max_sort_file_size=100G
  136.  
  137. # If the temporary file used for fast index creation would be bigger
  138. # than using the key cache by the amount specified here, then prefer the
  139. # key cache method. This is mainly used to force long character keys in
  140. # large tables to use the slower key cache method to create the index.
  141. myisam_sort_buffer_size=69M
  142.  
  143. # Size of the Key Buffer, used to cache index blocks for MyISAM tables.
  144. # Do not set it larger than 30% of your available memory, as some memory
  145. # is also required by the OS to cache rows. Even if you're not using
  146. # MyISAM tables, you should still set it to 8-64M as it will also be
  147. # used for internal temporary disk tables.
  148. key_buffer_size=300M
  149.  
  150. # Size of the buffer used for doing full table scans of MyISAM tables.
  151. # Allocated per thread, if a full scan is needed.
  152. read_buffer_size=64K
  153. read_rnd_buffer_size=256K
  154.  
  155. # This buffer is allocated when MySQL needs to rebuild the index in
  156. # REPAIR, OPTIMZE, ALTER table statements as well as in LOAD DATA INFILE
  157. # into an empty table. It is allocated per thread so be careful with
  158. # large settings.
  159. sort_buffer_size=256K
  160.  
  161.  
  162. #*** INNODB Specific options ***
  163.  
  164.  
  165. # Use this option if you have a MySQL server with InnoDB support enabled
  166. # but you do not plan to use it. This will save memory and disk space
  167. # and speed up some things.
  168. #skip-innodb
  169.  
  170. # Additional memory pool that is used by InnoDB to store metadata
  171. # information. If InnoDB requires more memory for this purpose it will
  172. # start to allocate it from the OS. As this is fast enough on most
  173. # recent operating systems, you normally do not need to change this
  174. # value. SHOW INNODB STATUS will display the current amount used.
  175. innodb_additional_mem_pool_size=100M
  176.  
  177. # If set to 1, InnoDB will flush (fsync) the transaction logs to the
  178. # disk at each commit, which offers full ACID behavior. If you are
  179. # willing to compromise this safety, and you are running small
  180. # transactions, you may set this to 0 or 2 to reduce disk I/O to the
  181. # logs. Value 0 means that the log is only written to the log file and
  182. # the log file flushed to disk approximately once per second. Value 2
  183. # means the log is written to the log file at each commit, but the log
  184. # file is only flushed to disk approximately once per second.
  185. innodb_flush_log_at_trx_commit=1
  186.  
  187. # The size of the buffer InnoDB uses for buffering log data. As soon as
  188. # it is full, InnoDB will have to flush it to disk. As it is flushed
  189. # once per second anyway, it does not make sense to have it very large
  190. # (even with long transactions).
  191. innodb_log_buffer_size=100M
  192.  
  193. # InnoDB, unlike MyISAM, uses a buffer pool to cache both indexes and
  194. # row data. The bigger you set this the less disk I/O is needed to
  195. # access data in tables. On a dedicated database server you may set this
  196. # parameter up to 80% of the machine physical memory size. Do not set it
  197. # too large, though, because competition of the physical memory may
  198. # cause paging in the operating system. Note that on 32bit systems you
  199. # might be limited to 2-3.5G of user level memory per process, so do not
  200. # set it too high.
  201. innodb_buffer_pool_size=5G
  202.  
  203. # Size of each log file in a log group. You should set the combined size
  204. # of log files to about 25%-100% of your buffer pool size to avoid
  205. # unneeded buffer pool flush activity on log file overwrite. However,
  206. # note that a larger logfile size will increase the time needed for the
  207. # recovery process.
  208. innodb_log_file_size=54M
  209.  
  210. # Number of threads allowed inside the InnoDB kernel. The optimal value
  211. # depends highly on the application, hardware as well as the OS
  212. # scheduler properties. A too high value may lead to thread thrashing.
  213. innodb_thread_concurrency=10
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