# Example MySQL config file for very large systems. # # This is for a large system with memory of 1G-2G where the system runs mainly # MySQL. # # You can copy this file to # /etc/my.cnf to set global options, # mysql-data-dir/my.cnf to set server-specific options (in this # installation this directory is /var/lib/mysql) or # ~/.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. # The following options will be passed to all MySQL clients [client] port = 3306 socket = /run/mysqld/mysqld.sock # Here follows entries for some specific programs # The following values assume you have at least 32M ram # This was formally known as [safe_mysqld]. Both versions are currently parsed. [mysqld_safe] socket = /run/mysqld/mysqld.sock nice = 0 # The MySQL server [mysqld] port = 3306 socket = /run/mysqld/mysqld.sock #datadir = /data/mysql ## - skip_external_locking ## - ## - Affects only MyISAM table access. ## - ## - This is OFF if mysqld uses external locking (system locking), ## - ON if external locking is disabled. ## - ## - Default: ON ## - skip-external-locking # 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 # Instead of skip-networking the default is now to listen only on # localhost which is more compatible and is not less secure. # #bind-address = 127.0.0.1 bind-address = 127.0.0.1 # Replication Master Server (default) # binary logging is required for replication #log-bin=mysql-bin # required unique id between 1 and 2^32 - 1 # defaults to 1 if master-host is not set # but will not function as a master if 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=, MASTER_PORT=, # MASTER_USER=, MASTER_PASSWORD= ; # # where you replace , , by quoted strings and # 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 # change in this file to the variables' 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 = # # The username the slave will use for authentication when connecting # to the master - required #master-user = # # The password the slave will authenticate with when connecting to # the master - required #master-password = # # The port the master is listening on. # optional - defaults to 3306 #master-port = # # binary logging - not required for slaves, but recommended #log-bin=mysql-bin # # binary logging format - mixed recommended #binlog_format=mixed # Point the following paths to different dedicated disks #tmpdir = /tmp/ #log-update = /path-to-dedicated-directory/hostname ## - max_connections ## - ## - Die zulässige Anzahl nebenläufiger Clientverbindungen. Wenn dieser Wert erhöht ## - wird, erhöht sich auch die Anzahl der Dateideskriptoren, die mysqld benötigt. ## - ## - Vorgabewert ist 100 ## - #max_connections = 300 ## - explicit_defaults_for_timestamp ## - ## - This variable was added in MySQL 5.6.6 ## - ## - In MySQL, the TIMESTAMP data type differs in nonstandard ways ## - from other data types. See MySQL Dokumentation. ## - ## - [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. ## - Please use --explicit_defaults_for_timestamp server option (see ## - documentation for more details). ## - ## - As indicated by the warning, to turn off the nonstandard behaviors, ## - enable the new . ## - explicit_defaults_for_timestamp = TRUE ## - MySQL Fehlermeldungen ## - ## - !! Notice ## - erst ab für mysql 5.5.x ## - ## - lc-messages=de_DE ## - lc-messages-dir=/usr/local/mysql/share ## - #lc-messages-dir=/usr/share/mysql ## - ## - bis 5.1.x ## - ## - language=/usr/local/mysql/share/german ## - #language=/usr/share/mysql/german ## - ## - low-priority-updates ## - ## - Give table-modifying operations (INSERT, REPLACE, DELETE, ## - UPDATE) lower priority than selects. ## - ## - low-priority-updates = 1 ## - concurrent_insert ## - ## - If activated (1 or AUTO, the default), MySQL permits INSERT ## - and SELECT statements to run concurrently for MyISAM tables ## - that have no free blocks in the middle of the data file. ## - ## - If set to 2 or ALWAYS, MySQL enables concurrent inserts for ## - all MyISAM tables, even those that have holes. For a table with ## - a hole, new rows are inserted at the end of the table if it is ## - in use by another thread. Otherwise, MySQL acquires a normal ## - write lock and inserts the row into the hole. ## - concurrent_insert = 2 ## - open-files-limit ## - ## - put the following lines into /etc/security/limits.conf ## - ## - @staff hard nofile 32768 ## - root hard nofile 32768 ## - ## - see also http://linux-vserver.org/Ulimit_Nofiles ## - open-files-limit = 8192 ## ------------------------- ## InnoDB specific variables ## - innodb_file_per_table ## - ## - When innodb_file_per_table is enabled (the default in 5.6.6 and higher), ## - InnoDB stores the data and indexes for each newly created table in a ## - separate .ibd file, rather than in the system tablespace. ## - innodb_file_per_table ## - innodb_data_home_dir ## - ## - Default: MySQL data directory ## - #innodb_data_home_dir = /data/mysql #innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend ## - innodb_log_group_home_dir ## - ## - The directory path to the InnoDB redo log files, whose number ## - is specified by innodb_log_files_in_group. ## - ## - If you do not specify any InnoDB log variables, the default is ## - to create two files named ib_logfile0 and ib_logfile1 in the MySQL ## - data directory. Their size is given by the size of the ## - innodb_log_file_size system variable. ## - #innodb_log_group_home_dir = /var/lib/mysql/ ## - innodb_buffer_pool_size ## - ## - The size in bytes of the buffer pool, the memory area where InnoDB ## - caches table and index data. ## - ## - You can set .._buffer_pool_size up to 50 - 80 % ## - of RAM but beware of setting memory usage too high ## - ## - Note: ## - When the size of the buffer pool is greater than 1GB, setting ## - innodb_buffer_pool_instances to a value greater than 1 can improve ## - the scalability on a busy server. ## - ## - default: 134217728 (128M) ## - #innodb_buffer_pool_size = 384M #innodb_buffer_pool_size = 1024M ## - innodb_additional_mem_pool_size ## - ## - The size in bytes of a memory pool InnoDB uses to store data dictionary ## - information and other internal data structures. ## - ## - Default: 8388608 (8M) ## - #innodb_additional_mem_pool_size = 20M #innodb_additional_mem_pool_size = 40M ## - innodb_buffer_pool_instances ## - ## - The number of regions that the InnoDB buffer pool is divided into. ## - ## - Note: ## - For systems with buffer pools in the multi-gigabyte range, dividing ## - the buffer pool into separate instances can improve concurrency, by ## - reducing contention as different threads read and write to cached pages. ## - ## - Default: 1 ## - #innodb_buffer_pool_instances = 1 ## - innodb_log_file_size ## - ## - The size in bytes of each log file in a log group. ## - ## - Default: 5242880 (5M) ## - ## (Set .._log_file_size to 25 % of buffer pool size) ## - #innodb_log_file_size = 100M #innodb_log_file_size = 256M ## - innodb_log_buffer_size ## - ## - The size in bytes of the buffer that InnoDB uses to write to the ## - log files on disk. ## - ## - Default: 8388608 (8M) ## - #innodb_log_buffer_size = 8M #innodb_log_buffer_size = 32M ## - innodb_flush_log_at_trx_commit ## - ## - Controls the balance between strict ACID compliance for commit ## - operations, and higher performance that is possible when ## - commit-related I/O operations are rearranged and done in batches. ## - You can achieve better performance by changing the default value, ## - but then you can lose up to one second worth of transactions in a crash. ## - ## - In case of extrem slowly restores set ## - ## - innodb_flush_log_at_trx_commit = 2 ## - innodb_log_file_size = 256M ## - ## - Also try to add (befor DROP/CREATE/INSET Statements) to the dumpfile: ## - ## - ... ## - SET FOREIGN_KEY_CHECKS=0; ## - SET unique_checks=0; ## - SET AUTOCOMMIT=0; ## - ## - DROP TABLE IF EXISTS.. ## - ... ## - #innodb_flush_log_at_trx_commit = 1 #innodb_flush_log_at_trx_commit = 2 ## - innodb_lock_wait_timeout ## - ## - The length of time in seconds an InnoDB transaction waits for a row ## - lock before giving up. ## - ## - Default: 50 ## - #innodb_lock_wait_timeout = 50 ## InnoDB specific variables ## ------------------------- ## - sort_buffer_size ## - ## - Each session that needs to do a sort allocates a buffer of this size. ## - sort_buffer_size is not specific to any storage engine and applies ## - in a general manner for optimization. ## - ## - Default: 2097152 (2M) ## - sort_buffer_size = 2M ## - key_buffer_size ## - ## - key_buffer_size" is a MyISAM parameter ! ## - ## - Index blocks for MyISAM tables are buffered and are shared by all threads. ## - key_buffer_size is the size of the buffer used for index blocks. The key ## - buffer is also known as the key cache. ## - ## - Default: 8388608 (8M) ## - key_buffer_size = 384M ## - read_buffer_size ## - ## - Each thread that does a sequential scan for a MyISAM table allocates ## - a buffer of this size (in bytes) for each table it scans. If you do ## - many sequential scans, you might want to increase this value. ## - ## - Default: 131072 (128K) ## - read_buffer_size = 2M ## - read_rnd_buffer_size ## - ## - This variable is used for reads from MyISAM tables, and, for any ## - storage engine, for Multi-Range Read optimization. ## - ## - Default: 262144 (256K) ## - read_rnd_buffer_size = 8M ## - myisam_sort_buffer_size ## - ## - The size of the buffer that is allocated when sorting MyISAM indexes ## - during a REPAIR TABLE or when creating indexes with CREATE INDEX or ## - ALTER TABLE. ## - ## - Default: 8388608 (8M) ## - myisam_sort_buffer_size = 64M ## - max_allowed_packet ## - ## - The maximum size of one packet or any generated/intermediate string, or ## - any parameter sent by the mysql_stmt_send_long_data() C API function. ## ## - Default: 4MB (MySQL 5.6.6), 1MB before that. ## - #max_allowed_packet = 4M max_allowed_packet = 32M ## - table_open_cache ## - ## - The number of open tables for all threads. Increasing this value ## - increases the number of file descriptors that mysqld requires. ## - ## - You can check whether you need to increase the table cache by checking ## - the Opened_tables status variable. If the value of Opened_tables is large ## - and you do not use FLUSH TABLES often (which just forces all tables to be ## - closed and reopened), then you should increase the value of the ## - table_open_cache variable. ## - table_open_cache = 512 ## - table_definition_cache ## - ## - The number of table definitions (from .frm files) that can be stored ## - in the definition cache. ## - ## - Default: (400 + (table_open_cache / 2) since 5.6.8, 400 before ## - #table_definition_cache = 1680 ## - max_connect_errors ## - ## - Default: 100 (5.6.6), 10 (before) ## - max_connect_errors = 999999 ## - thread_concurrency ## - ## - NOTE: ## - This variable is specific to Solaris 8 and earlier systems. ## - ## - This variable is deprecated as of MySQL 5.6.1 and is removed in MySQL 5.7. ## - You should remove this from MySQL configuration files whenever you see it ## - unless they are for Solaris 8 or earlier ## - ## - (Try number of CPU's*2 for thread_concurrency) ## - #thread_concurrency = 16 ## - thread_cache_size ## - ## - How many threads the server should cache for reuse. When a client ## - disconnects, the client's threads are put in the cache if there are ## - fewer than thread_cache_size threads there. ## - ## - Default: 8 + (max_connections / 100) (5.6.8) , 0 (before) ## - thread_cache_size = 8 ## - thread_stack ## - ## - The stack size for each thread. Many of the limits detected by ## - the crash-me test are dependent on this value. ## - ## - The default of 192KB (256KB for 64-bit systems) is large enough ## - for normal operation. If the thread stack size is too small, it ## - limits the complexity of the SQL statements that the server can handle, ## - the recursion depth of stored procedures, and other memory-consuming ## - actions. ## - Default: 262144 (256K) ## - thread_stack = 262144 ## - Unbenutze Datenbank Engines deaktivieren ## - ## - skip-innodb ## - ## - Deaktiviert die Unterstützung für InnoDB ## - ## - Sincs version 5.5, you have to set default-storage-engine ## - to MyISAM, if using skip-innodb ## - #default-storage-engine=MyISAM #skip-innodb ## - log-error ## - ## - Log errors and startup messages to this file. If you omit the file ## - name, MySQL uses host_name.err. If the file name has no extension, ## - the server adds an extension of .err. ## - log-error = /var/log/mysql/mysql-err.log ## - ft_min_word_len ## - ## - Die minimale Länge des Wortes, das in einem FULLTEXT-Index enthalten sein darf. ## - ## - Notice! ## - if you set ## - [mysqld] ## - ft_min_word_len=3 ## - ## - you should also set ## - [myisamchk] ## - ft_min_word_len=3 ## - ## - ## - Vorgabewert ist 4 #ft_min_word_len = 3 ## - ft_stopword_file ## - ## - Datei, aus der die Liste der Stoppwörter für die Volltextsuche ausgelesen wird. ## - Es werden alle Wörter aus der Datei verwendet; Kommentare hingegen werden nicht ## - berücksichtigt. Standardmäßig wird eine eingebaute Liste mit Stoppwörtern (wie ## - in der Datei myisam/ft_static.c definiert) verwendet. Wird diesee Variable auf den ## - Leer-String gesetzt (''), wird die Ausfilterung von Stoppwörtern deaktiviert. ## - ## - Hinweis: Wird diese Variable geändern oder den Inhalt der Stoppwortdatei selbst, ## - müssen die FULLTEXT-Indizes neu erstellt werden (REPAIR TABLE tbl_name QUICK. ). ## - #ft_stopword_file = /usr/local//mysql/stopwords_utf8_iso8859-15.txt ## ------------- ## - query cache ## - query_cache_type ## - ## - 0 : verhindert das Speichern von Abfragen im und ## - das Abrufen aus dem Cache ## - 1 : gestattet das Speichern von Abfragen im Cache. ## - Ausgenommen sind Anweisungen, die mit ## - SELECT SQL_NO_CACHE beginnen. ## - 2 : speichert nur diejenigen Anweisungen im Cache, ## - die mit SELECT SQL_CACHE beginnen. query_cache_type = 1 ## - query_cache_limit ## - ## - Gibt die maximale Größe einzelner Abfrageergebnisse an, die im ## - Cache gespeichert werden können. ## - ## - Vorgeabewert ist 1Mbyte ## - query_cache_limit = 4M ## - query_cache_min_res_unit ## - ## - Die im Abfrage-Cache abgelegten Ergebnisse, werden nicht am Stück ## - verwaltet. Der Abfrage-Cache reserviert Blöcke zur Speicherung dieser ## - Daten nach Bedarf, d. h. wenn ein Block voll ist, wird der nächste ## - zugewiesen. Da der Speicherreservierungsvorgang (in zeitlicher Hinsicht) ## - aufwändig ist, reserviert der Abfrage-Cache die Blöcke mit einer ## - Mindestgröße, die durch die Systemvariable query_cache_min_res_unit ## - festgelegt wird. Wird eine Abfrage ausgeführt, dann wird der letzte ## - Ergebnisblock auf die tatsächliche Datengröße zugeschnitten, sodass ## - unbenutzter Speicher freigegeben wird. ## - ## - Siehe auch http://dev.mysql.com/doc/refman/5.1/de/query-cache-configuration.html ## - ## - Vorgabewert ist 4Kbyte ## - query_cache_min_res_unit = 8K ## - query_cache_size ## - ## - Die Größe des Abfrage-Caches. ## - ## - Wird query_cache_size auf einen Wert größer Null gesetzt, so ist zu beachten, ## - dass der Abfrage-Cache eine Mindestgröße von ca. 40 Kbyte benötigt, um seine ## - Strukturen zuzuweisen. (Der exakte Wert hängt von der Systemarchitektur ab.) ## - Wird der Wert zu niedrig angesetzt, wird eine Warnung ausgegeben. ## - ## - Vorgabewert ist 0, d. h. der Abfrage-Cache ist vorgabeseitig deaktiviert. ## - #query_cache_size = 32M query_cache_size = 128M ## - query cache ## ------------- ## -------------- ## - slow queries ## - slow_query_log ## - ## - Gibt an, ob das Logging für langsame Abfragen eingeschaltet (1 oder ON) ## - bzw ausgeschaltet (0 oder OFF) ist. ## - ## - Vorgabewert ist 0 oder OFF ## - slow_query_log = 1 ## - long_query_time ## - ## - Wenn eine Abfrage länger dauert als durch diese Variable (in Sekunden) angegeben, ## - erhöht der Server die Statusvariable Slow_queries entsprechend. Wird die Option ## - --log-slow-queries verwendet, wird die Abfrage in der Logdatei für langsame Abfragen ## - protokolliert. Dieser Wert wird als Echtzeit (nicht als Prozessorzeit) gemessen, d. h. ## - eine Abfrage, die bei einem System mit geringer Belastung den Schwellwert ## - unterschreitet, kann bei einem stark belasteten System bereits darüber liegen. ## - Der Mindestwert ist 1. ## - ## - Vorgabewert ist 10 ## - long_query_time = 1 ## - slow_query_log_file ## - ## - Name der Logdatei, in die langsame Abfragen gespeichert werden. ## - ## - Vorgabewert ist -slow.log ## - slow_query_log_file = /var/log/mysql/mysql-slow.log ## - log-queries-not-using-indexes ## - ## - Gibt an, ob Abfragen, die keine Indizes benutzen in der Logdatei ## - für langsame Abfragen mitgespeichert werden sollen. ## - ## - Vorgabewert ist 0 ## - #log_queries_not_using_indexes = 1 log_queries_not_using_indexes = 0 ## - slow queries ## -------------- ## - join_buffer_size ## - ## - Die Größe des Puffers, der für Joins benutzt wird, die keine Indizes verwenden ## - und deswegen vollständige Tabellenscans durchführen. Normalerweise besteht die ## - beste Möglichkeit der Realisierung schneller Joins darin, Indizes hinzuzufügen. ## - Erhöhen Sie den Wert von join_buffer_size, um einen schnelleren vollständigen ## - Join zu implementieren, wenn das Hinzufügen von Indizes nicht möglich ist. Für ## - jeden vollständigen Join zwischen zwei Tabellen wird ein Join-Puffer hinzugefügt. ## - Für einen komplexen Join zwischen mehreren Tabellen, für den Indizes nicht verwendet ## - werden, sind unter Umständen mehrere Join-Puffer erforderlich. ## - ## - Wird die Option --log-slow-queries (ON) verwendet, werden Abfragen, die keine ## - Indizes verwenden, in das Log für langsame Abfragen geschrieben. ## - ## - Vorgabewert ist 128K ## - #join_buffer_size = 384K ## - max_heap_table_size ## - ## - Diese Variable bestimmt die maximale Größe, auf die MEMORY-Tabellen anwachsen dürfen. ## - Der Wert der Variable wird zur Berechnung von MAX_ROWS-Werte für MEMORY-Tabellen ## - verwendet. Die Einstellung der Variable hat keine Auswirkungen auf bereits vorhandene ## - MEMORY-Tabellen, sofern diese nicht mit einer Anweisung wie CREATE TABLE neu erstellt ## - oder mit ALTER TABLE oder TRUNCATE TABLE modifiziert werden. ## - ## - Vorgabewert ist 16Mbyte ## - #max_heap_table_size = 96M ## - tmp_table_size ## - ## - Überschreitet eine temporäre Tabelle im Arbeitsspeicher diese Größe, wandelt MySQL ## - sie automatisch in eine MyISAM-Tabelle auf der Festplatte um. ## - ## - Werden viele erweiterte GROUP-BY-Anfragen ausgeführt (und ist genügend Speicher ## - vorhanden), so sollte diese Variable erhöht werden. ## ## - Default: 16777216 (16M) ## - ## - Note: ## - Effective in-memory tmp_table_size is limited to max_heap_table_size. ## - #tmp_table_size = 96M ## - angepasste Einstellungen ## ------------------------------------------ [mysqldump] quick max_allowed_packet = 32M [mysql] no-auto-rehash # Remove the next comment character if you are not familiar with SQL #safe-updates [myisamchk] key_buffer_size = 256M sort_buffer_size = 256M read_buffer = 2M write_buffer = 2M ## ------------------------------------------ ## - angepasste Einstellungen ## - ft_min_word_len ## - ## - Die minimale Länge des Wortes, das in einem FULLTEXT-Index enthalten sein darf. ## - ## - Notice! ## - if you set ## - [mysqld] ## - ft_min_word_len=3 ## - ## - you should also set ## - [myisamchk] ## - ft_min_word_len=3 ## - ## - ## - Vorgabewert ist 4 ft_min_word_len = 3 ## - angepasste Einstellungen ## ------------------------------------------ [mysqlhotcopy] interactive-timeout