my-innodb-heavy-4G.ini
上传用户:romrleung
上传日期:2022-05-23
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文件大小:21k
源码类别:
MySQL数据库
开发平台:
Visual C++
- #BEGIN CONFIG INFO
- #DESCR: 4GB RAM, InnoDB only, ACID, few connections, heavy queries
- #TYPE: SYSTEM
- #END CONFIG INFO
- #
- # This is a MySQL example config file for systems with 4GB of memory
- # running mostly MySQL using InnoDB only tables and performing complex
- # queries with few connections.
- #
- # You can copy this file to /etc/my.cnf to set global options,
- # mysql-data-dir/my.cnf to set server-specific options
- # (/usr/local/var for this installation) or to
- # ~/.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.
- #
- # More detailed information about the individual options can also be
- # found in the manual.
- #
- #
- # 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]
- #password = [your_password]
- port = 3306
- socket = /tmp/mysql.sock
- # *** Application-specific options follow here ***
- #
- # The MySQL server
- #
- [mysqld]
- # generic configuration options
- port = 3306
- socket = /tmp/mysql.sock
- # back_log is the number of connections the operating system can keep in
- # the listen queue, before the MySQL connection manager thread has
- # processed them. If you have a very high connection rate and experience
- # "connection refused" errors, you might need to increase this value.
- # Check your OS documentation for the maximum value of this parameter.
- # Attempting to set back_log higher than your operating system limit
- # will have no effect.
- back_log = 50
- # 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!
- #skip-networking
- # 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 = 100
- # Maximum amount of errors allowed per host. If this limit is reached,
- # the host will be blocked from connecting to the MySQL server until
- # "FLUSH HOSTS" has been run or the server was restarted. Invalid
- # passwords and other errors during the connect phase result in
- # increasing this value. See the "Aborted_connects" status variable for
- # global counter.
- max_connect_errors = 10
- # 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 = 2048
- # Enable external file level locking. Enabled file locking will have a
- # negative impact on performance, so only use it in case you have
- # multiple database instances running on the same files (note some
- # restrictions still apply!) or if you use other software relying on
- # locking MyISAM tables on file level.
- #external-locking
- # The maximum size of a query packet the server can handle as well as
- # maximum query size server can process (Important when working with
- # large BLOBs). enlarged dynamically, for each connection.
- max_allowed_packet = 16M
- # The size of the cache to hold the SQL statements for the binary log
- # during a transaction. If you often use big, multi-statement
- # transactions you can increase this value to get more performance. All
- # statements from transactions are buffered in the binary log cache and
- # are being written to the binary log at once after the COMMIT. If the
- # transaction is larger than this value, temporary file on disk is used
- # instead. This buffer is allocated per connection on first update
- # statement in transaction
- binlog_cache_size = 1M
- # Maximum allowed size for a single HEAP (in memory) table. This option
- # is a protection against the accidential creation of a very large HEAP
- # table which could otherwise use up all memory resources.
- max_heap_table_size = 64M
- # Sort buffer is used to perform sorts for some ORDER BY and GROUP BY
- # queries. If sorted data does not fit into the sort buffer, a disk
- # based merge sort is used instead - See the "Sort_merge_passes"
- # status variable. Allocated per thread if sort is needed.
- sort_buffer_size = 8M
- # This buffer is used for the optimization of full JOINs (JOINs without
- # indexes). Such JOINs are very bad for performance in most cases
- # anyway, but setting this variable to a large value reduces the
- # performance impact. See the "Select_full_join" status variable for a
- # count of full JOINs. Allocated per thread if full join is found
- join_buffer_size = 8M
- # 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 = 8
- # This permits the application to give the threads system a hint for the
- # desired number of threads that should be run at the same time. This
- # value only makes sense on systems that support the thread_concurrency()
- # function call (Sun Solaris, for example).
- # You should try [number of CPUs]*(2..4) for thread_concurrency
- thread_concurrency = 8
- # 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 = 64M
- # Only cache result sets that are smaller than this limit. This is to
- # protect the query cache of a very large result set overwriting all
- # other query results.
- query_cache_limit = 2M
- # Minimum word length to be indexed by the full text search index.
- # You might wish to decrease it if you need to search for shorter words.
- # Note that you need to rebuild your FULLTEXT index, after you have
- # modified this value.
- ft_min_word_len = 4
- # If your system supports the memlock() function call, you might want to
- # enable this option while running MySQL to keep it locked in memory and
- # to avoid potential swapping out in case of high memory pressure. Good
- # for performance.
- #memlock
- # Table type which is used by default when creating new tables, if not
- # specified differently during the CREATE TABLE statement.
- default_table_type = MYISAM
- # Thread stack size to use. This amount of memory is always reserved at
- # connection time. MySQL itself usually needs no more than 64K of
- # memory, while if you use your own stack hungry UDF functions or your
- # OS requires more stack for some operations, you might need to set this
- # to a higher value.
- thread_stack = 192K
- # Set the default transaction isolation level. Levels available are:
- # READ-UNCOMMITTED, READ-COMMITTED, REPEATABLE-READ, SERIALIZABLE
- transaction_isolation = REPEATABLE-READ
- # 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 = 64M
- # Enable binary logging. This is required for acting as a MASTER in a
- # replication configuration. You also need the binary log if you need
- # the ability to do point in time recovery from your latest backup.
- log_bin
- # If you're using replication with chained slaves (A->B->C), you need to
- # enable this option on server B. It enables logging of updates done by
- # the slave thread into the slave's binary log.
- #log_slave_updates
- # Enable the full query log. Every query (even ones with incorrect
- # syntax) that the server receives will be logged. This is useful for
- # debugging, it is usually disabled in production use.
- #log
- # Print warnings to the error log file. If you have any problem with
- # MySQL you should enable logging of warnings and examine the error log
- # for possible explanations.
- #log_warnings
- # Log slow queries. Slow queries are queries which take more than the
- # amount of time defined in "long_query_time" or which do not use
- # indexes well, if log_long_format is enabled. It is normally good idea
- # to have this turned on if you frequently add new queries to the
- # system.
- log_slow_queries
- # All queries taking more than this amount of time (in seconds) will be
- # trated as slow. Do not use "1" as a value here, as this will result in
- # even very fast queries being logged from time to time (as MySQL
- # currently measures time with second accuracy only).
- long_query_time = 2
- # Log more information in the slow query log. Normally it is good to
- # have this turned on. This will enable logging of queries that are not
- # using indexes in addition to long running queries.
- log_long_format
- # The directory used by MySQL for storing temporary files. For example,
- # it is used to perform disk based large sorts, as well as for internal
- # and explicit temporary tables. It might be good to put it on a
- # swapfs/tmpfs filesystem, if you do not create very large temporary
- # files. Alternatively you can put it on dedicated disk. You can
- # specify multiple paths here by separating them by ";" - they will then
- # be used in a round-robin fashion.
- #tmpdir = /tmp
- # *** Replication related settings
- # Unique server identification number between 1 and 2^32-1. This value
- # is required for both master and slave hosts. It defaults to 1 if
- # "master-host" is not set, but will MySQL will not function as a master
- # if it is 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:
- #
- # CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,
- # 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
- # changes in this file to the variable 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>
- # Make the slave read-only. Only users with the SUPER privilege and the
- # replication slave thread will be able to modify data on it. You can
- # use this to ensure that no applications will accidently modify data on
- # the slave instead of the master
- #read_only
- #*** MyISAM Specific options
- # 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 = 32M
- # 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 = 2M
- # When reading rows in sorted order after a sort, the rows are read
- # through this buffer to avoid disk seeks. You can improve ORDER BY
- # performance a lot, if set this to a high value.
- # Allocated per thread, when needed.
- read_rnd_buffer_size = 16M
- # MyISAM uses special tree-like cache to make bulk inserts (that is,
- # INSERT ... SELECT, INSERT ... VALUES (...), (...), ..., and LOAD DATA
- # INFILE) faster. This variable limits the size of the cache tree in
- # bytes per thread. Setting it to 0 will disable this optimisation. Do
- # not set it larger than "key_buffer_size" for optimal performance.
- # This buffer is allocated when a bulk insert is detected.
- bulk_insert_buffer_size = 64M
- # This buffer is allocated when MySQL needs to rebuild the index in
- # REPAIR, OPTIMIZE, 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.
- myisam_sort_buffer_size = 128M
- # 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 = 10G
- # 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_max_extra_sort_file_size = 10G
- # If a table has more than one index, MyISAM can use more than one
- # thread to repair them by sorting in parallel. This makes sense if you
- # have multiple CPUs and plenty of memory.
- myisam_repair_threads = 1
- # Automatically check and repair not properly closed MyISAM tables.
- myisam_recover
- # *** BDB Specific options ***
- # Use this option if you run a MySQL server with BDB support enabled but
- # you do not plan to use it. This will save memory and may speed up some
- # things.
- skip-bdb
- # *** 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 = 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 = 2G
- # InnoDB stores data in one or more data files forming the tablespace.
- # If you have a single logical drive for your data, a single
- # autoextending file would be good enough. In other cases, a single file
- # per device is often a good choice. You can configure InnoDB to use raw
- # disk partitions as well - please refer to the manual for more info
- # about this.
- innodb_data_file_path = ibdata1:10M:autoextend
- # Set this option if you would like the InnoDB tablespace files to be
- # stored in another location. By default this is the MySQL datadir.
- #innodb_data_home_dir = <directory>
- # Number of IO threads to use for async IO operations. This value is
- # hardcoded to 4 on Unix, but on Windows disk I/O may benefit from a
- # larger number.
- innodb_file_io_threads = 4
- # If you run into InnoDB tablespace corruption, setting this to a nonzero
- # value will likely help you to dump your tables. Start from value 1 and
- # increase it until you're able to dump the table successfully.
- #innodb_force_recovery=1
- # 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 = 16
- # 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 = 1
- # Speed up InnoDB shutdown. This will disable InnoDB to do a full purge
- # and insert buffer merge on shutdown. It may increase shutdown time a
- # lot, but InnoDB will have to do it on the next startup instead.
- #innodb_fast_shutdown
- # 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 = 8M
- # 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 = 256M
- # Total number of files in the log group. A value of 2-3 is usually good
- # enough.
- innodb_log_files_in_group = 3
- # Location of the InnoDB log files. Default is the MySQL datadir. You
- # may wish to point it to a dedicated hard drive or a RAID1 volume for
- # improved performance
- #innodb_log_group_home_dir
- # Maximum allowed percentage of dirty pages in the InnoDB buffer pool.
- # If it is reached, InnoDB will start flushing them out agressively to
- # not run out of clean pages at all. This is a soft limit, not
- # guaranteed to be held.
- innodb_max_dirty_pages_pct = 90
- # The flush method InnoDB will use for Log. The tablespace always uses
- # doublewrite flush logic. The default value is "fdatasync", another
- # option is "O_DSYNC".
- #innodb_flush_method=O_DSYNC
- # How long an InnoDB transaction should wait for a lock to be granted
- # before being rolled back. InnoDB automatically detects transaction
- # deadlocks in its own lock table and rolls back the transaction. If you
- # use the LOCK TABLES command, or other transaction-safe storage engines
- # than InnoDB in the same transaction, then a deadlock may arise which
- # InnoDB cannot notice. In cases like this the timeout is useful to
- # resolve the situation.
- innodb_lock_wait_timeout = 120
- [mysqldump]
- # Do not buffer the whole result set in memory before writing it to
- # file. Required for dumping very large tables
- quick
- max_allowed_packet = 16M
- [mysql]
- no-auto-rehash
- # Only allow UPDATEs and DELETEs that use keys.
- #safe-updates
- [isamchk]
- key_buffer = 512M
- sort_buffer_size = 512M
- read_buffer = 8M
- write_buffer = 8M
- [myisamchk]
- key_buffer = 512M
- sort_buffer_size = 512M
- read_buffer = 8M
- write_buffer = 8M
- [mysqlhotcopy]
- interactive-timeout
- [mysqld_safe]
- # Increase the amount of open files allowed per process. Warning: Make
- # sure you have set the global system limit high enough! The high value
- # is required for a large number of opened tables
- open-files-limit = 8192