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additional memory is allocated only when needed. For example, MYSQLD will allocate more memory only if you issue a long query or if mysqld must return a large result row. # This variable takes a smaller default value as a precaution to capture error packets between the client and server, and to ensure that memory overflows are not caused by accidental use of large packets. Binlog_cache_size=1m# a transaction that, when not committed, logs the resulting log to the cache, and persists the log to

the client and server, and to ensure that memory overflows are not caused by accidental use of large packets. Binlog_cache_size = 1m# A transaction that, when not committed, logs the resulting log to the cache, and persists the log to disk when the transaction submission needs to be committed. The default binlog_cache_size size is 32K max_heap_table_size = 8m# defines the memory tables that the user can create (The size of the memory table). This val

file descriptors required for each connection);# when the Table_open_cache is set to very large, if the system can not handle so many file descriptors, then the client will fail, the connection is notMax_allowed_packet = 4M# The size of the packet accepted; It is safe to increase the value of the variable because additional memory is allocated only when needed. For example, MYSQLD will allocate more memory only if you issue a long query or if mysqld must return a large result row.# This variabl

descriptors required for each connection);# when the Table_open_cache is set to very large, if the system can not handle so many file descriptors, then the client will fail, the connection is not Max_allowed_packet = 4M# The size of the packet accepted; It is safe to increase the value of the variable because additional memory is allocated only when needed. For example, MYSQLD will allocate more memory only if you issue a long query or if mysqld must return a large result row.# This variable ta

descriptors required for each connection);# when the Table_open_cache is set to very large, if the system can not handle so many file descriptors, then the client will fail, the connection is not Max_allowed_packet = 4M# The size of the packet accepted; It is safe to increase the value of the variable because additional memory is allocated only when needed. For example, MYSQLD will allocate more memory only if you issue a long query or if mysqld must return a large result row.# This variable ta

. Default Binlog_cache_size size 32K Max_heap_table_size = 8M# defines the size of memory table that the user can create. This value is used to calculate the maximum row value for the memory table. This variable supports dynamic change Tmp_table_size = 16M# MySQL heap (heap) table buffer size. All unions are completed within a DML instruction, and most unions can be done without a temporary table.# Most temporary tables are memory-based (HEAP) tables.

for each connection);# when the Table_open_cache is set to very large, if the system can not handle so many file descriptors, then the client will fail, the connection is notMax_allowed_packet = 4M# The size of the packet accepted; It is safe to increase the value of the variable because additional memory is allocated only when needed. For example, MYSQLD will allocate more memory only if you issue a long query or if mysqld must return a large result row.# This variable takes a smaller default

this value to get greater performance, all engaged in The state of the service is buffered in the Binlog buffer and then committed once to Binlog, and if the transaction is larger than this value, the temporaryFile instead, this buffer is created at the first update state of each linked transaction Max_heap_table_size = 64M #独立的内存表所允许的最大容量read_buffer_size = 2M #read_buffer_size读查询操作所 The buffer size that can be used, like sort_buffer_size, the allocated memory for this parameter is also the exc

. Binlog_cache_size = 1M# a transaction, in the absence of submission, the resulting log, recorded in the cache; When a transaction submission needs to be submitted, the log is persisted to disk. Default Binlog_cache_size size 32K Max_heap_table_size = 8M# defines the size of the memory table (memory table) that users can create. This value is used to calculate the maximum row value of the memory table. This variable supports dynamic change Tmp_

-file = /data/mysql/mysql.pid user = mysql bind-address = 0.0.0.0 server-id = 1 init-connect = ‘SET NAMES utf8mb4‘ character-set-server = utf8mb4 #skip-name-resolve #skip-networking back_log = 300 max_connections = 1000 max_connect_errors = 6000 open_files_limit = 65535 table_open_cache = 128 max_allowed_packet = 4M binlog_cache_size = 1M max_heap_table_size = 8M tmp_table_size = 16M read_buffer_size = 2M read_rnd_buffer_size =

ensure that memory overflows are not caused by accidental use of large packets. Binlog_cache_size=1m# a transaction that, when not committed, logs the resulting log to the cache, and persists the log to disk when the transaction submission needs to be committed. Default binlog_cache_size size 32K max_heap_table_size=8m# defines the size of memory table that users can create. This value is used to calculate the maximum row value for the memory table.

memory overflows are not caused by accidental use of large packets.Binlog_cache_size = 1M# A transaction that, when not committed, logs the log to the cache, and persists the log to disk until the commit of the transaction is required. Default Binlog_cache_size size 32KMax_heap_table_size = 8M# defines the size of memory table that the user can create. This value is used to calculate the maximum row value for the memory table. This variable supports

concurrent connections, you need to set this parameter to 200*n (N is the number of file descriptors required for each connection);# when the Table_open_cache is set to very large, if the system can not handle so many file descriptors, then the client will fail, the connection is not Max_allowed_packet = 4M# The size of the packet accepted; It is safe to increase the value of the variable because additional memory is allocated only when needed. For example, MYSQLD will allocate more memory only

for each connection);# when the Table_open_cache is set to very large, if the system can not handle so many file descriptors, then the client will fail, the connection is notMax_allowed_packet = 4M# The size of the packet accepted; It is safe to increase the value of the variable because additional memory is allocated only when needed. For example, MYSQLD will allocate more memory only if you issue a long query or if mysqld must return a large result row.# This variable takes a smaller default

, and persists the log to disk when the transaction submission needs to be committed. The default binlog_cache_size size 32kmax_heap_table_size=8m# defines the memory tables that users can create (memorytable) The size. This value is used to calculate the maximum row value for the memory table. This variable supports dynamically changing the heap (stack) table buffer size of the tmp_table_size=16m#mysql. All unions are completed within a DML instructi

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的库Replicate-wild-ignore-table=mysql.% #用来设置不需要同步的库Innodb_data_file_path=ibdata1:1g:autoextendLog-slave-updates #这个参数用来配置从服务器的更新是否写入二进制日志, this option is not open by default, but if this slave server B is server A from the server, but also as Server C's primary server, then you need to develop this option, So that it can synchronize operations from server C to get its binary logBinlog_cache_size = 4M # A transaction that, when not committed, logs the resulting log to the cache, and persists the l

# A transaction that, when not committed, logs the log to the cache, and persists the log to disk until the commit of the transaction is required. Default Binlog_cache_size size 32KMax_heap_table_size = 8M# defines the size of memory table that the user can create. This value is used to calculate the maximum row value for the memory table. This variable supports dynamic changeTmp_table_size = 16M# MySQL heap (heap) table buffer size. All unions are co

/ MySQL datadir=/data/mysql pid-file=/var/lib/mysql/mysql.pid user=mysql bind-address=0.0.0.0 server-id=1 skip-name-resolve #skip-networking back_log= max_connections=1000 max_connect_errors=6000 open_files_limit=65535 Table_ open_cache=128 max_allowed_packet=4m binlog_cache_size=1m max_heap_table_size =8m tmp_table_size=16m read_buffer_size=2m read_rnd_buffer_size= 8M sort_buffer_size=

for each connection);# when the Table_open_cache is set to very large, if the system can not handle so many file descriptors, then the client will fail, the connection is notMax_allowed_packet = 4M# The size of the packet accepted; It is safe to increase the value of the variable because additional memory is allocated only when needed. For example, MYSQLD will allocate more memory only if you issue a long query or if mysqld must return a large result row.# This variable takes a smaller default