网上复制的,稳定性和实用性未经过测试。
512M
https://blog.csdn.net/weixin_39620845/article/details/113214623
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | [client] port = 3306 socket = /tmp/mysql.sock [mysqld] port = 3306 socket = /tmp/mysql.sock skip-external-locking key_buffer_size = 24M sort_buffer_size = 512K read_buffer_size = 2M read_rnd_buffer_size = 4M join_buffer_size = 256K thread_cache_size = 10 query_cache_size = 1M query_cache_limit = 2M query_cache_min_res_unit = 4K thread_concurrency = 2 table_cache = 720 table_open_cache = 720 open_files_limit = 1000 back_log = 80 max_connections = 100 max_connect_errors = 200 external-locking = FALSE max_allowed_packet = 16M default-storage-engine = MyISAM thread_stack = 192K transaction_isolation = READ-COMMITTED tmp_table_size = 4M max_heap_table_size = 32M bulk_insert_buffer_size = 4M myisam_sort_buffer_size = 8M myisam_max_sort_file_size = 10G myisam_repair_threads = 1 myisam_recover server-id = 1 [mysqldump] quick max_allowed_packet = 32M [mysql] no-auto-rehash [myisamchk] key_buffer_size = 20M sort_buffer_size = 20M read_buffer = 2M write_buffer = 2M [mysqlhotcopy] interactive-timeout |
1G
https://ranjuan.cn/1g-memory-mysql57-optimization/
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 | [client] #password = your_password port = 3306 socket = /tmp/mysql.sock [mysqld] bind-address = 127.0.0.1 binlog_cache_size = 32K thread_stack = 256K join_buffer_size = 256K query_cache_type = 1 max_heap_table_size = 64M port = 3306 socket = /tmp/mysql.sock datadir = /www/server/data default_storage_engine = InnoDB performance_schema_max_table_instances = 400 table_definition_cache = 400 skip-external-locking key_buffer_size = 16M max_allowed_packet = 100G table_open_cache = 256 sort_buffer_size = 1024K net_buffer_length = 4K read_buffer_size = 1024K read_rnd_buffer_size = 256K myisam_sort_buffer_size = 4M thread_cache_size = 32 query_cache_size = 32M interactive_timeout=120 tmp_table_size = 64M sql-mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES explicit_defaults_for_timestamp = true #skip-name-resolve max_connections = 120 max_connect_errors = 100 open_files_limit = 65535 wait_timeout =120 log-bin=mysql-bin binlog_format=mixed server-id = 1 expire_logs_days = 10 slow_query_log=1 slow-query-log-file=/www/server/data/mysql-slow.log long_query_time=3 #log_queries_not_using_indexes=on innodb_data_home_dir = /www/server/data innodb_data_file_path = ibdata1:10M:autoextend innodb_log_group_home_dir = /www/server/data innodb_buffer_pool_size = 64M innodb_log_file_size = 5M innodb_log_buffer_size = 8M innodb_flush_log_at_trx_commit = 1 innodb_lock_wait_timeout = 50 innodb_max_dirty_pages_pct = 90 innodb_read_io_threads = 1 innodb_write_io_threads = 1 [mysqldump] quick max_allowed_packet = 500M [mysql] no-auto-rehash [myisamchk] key_buffer_size = 20M sort_buffer_size = 20M read_buffer = 2M write_buffer = 2M [mysqlhotcopy] interactive-timeout |
下面一张表格是我从国外的一个博客里边摘抄下来的MySQL的一些默认配置项和最低设置参数。
设置项 | 默认 | 最低 |
innodb_buffer_pool_size | 128M | 5M |
innodb_log_buffer_size | 1M | 256K |
query_cache_size | 1M | 0 |
max_connections | 151 | 1 (推荐最低设置为10) |
key_buffer_size | 8388608 | 8 |
thread_cache_size | (自动配置) | 0 |
host_cache_size | (自动配置) | 0 |
innodb_ft_cache_size | 8000000 | 1600000 |
innodb_ft_total_cache_size | 640000000 | 32000000 |
thread_stack | 262144 | 131072 |
sort_buffer_size | 262144 | 32K |
read_buffer_size | 131072 | 8200 |
read_rnd_buffer_size | 262144 | 8200 |
max_heap_table_size | 16777216 | 16K |
tmp_table_size | 16777216 | 1K |
bulk_insert_buffer_size | 8388608 | 0 |
join_buffer_size | 262144 | 128 |
net_buffer_length | 16384 | 1K |
innodb_sort_buffer_size | 1M | 64K |
binlog_cache_size | 32K | 4K |
binlog_stmt_cache_size | 32K | 4K |
MySQL优化设置
依据以上参数,MySQL的最小配置为:
# /etc/my.cnf:
innodb_buffer_pool_size=5M
innodb_log_buffer_size=256K
query_cache_size=0
max_connections=10
key_buffer_size=8
thread_cache_size=0
host_cache_size=0
innodb_ft_cache_size=1600000
innodb_ft_total_cache_size=32000000
# per thread or per operation settings
thread_stack=131072
sort_buffer_size=32K
read_buffer_size=8200
read_rnd_buffer_size=8200
max_heap_table_size=16K
tmp_table_size=1K
bulk_insert_buffer_size=0
join_buffer_size=128
net_buffer_length=1K
innodb_sort_buffer_size=64K
#settings that relate to the binary log (if enabled)
binlog_cache_size=4K
binlog_stmt_cache_size=4K
FinetunedMySQL
但是并不推荐使用最小配置,可以适当修改一下。
在另外一个博客上找到了一个比较适合于512M内存的配置:
# Example MySQL config file for large systems.
#
# This is for a large system with memory = 512M where the system runs mainly
# MySQL.
#
# MySQL programs look for option files in a set of
# locations which depend on the deployment platform.
# You can copy this option file to one of those
# locations. For information about these locations, see:
# http://dev.mysql.com/doc/mysql/en/option-files.html
#
# 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]
#password = your_password
port = 3306
socket = /var/lib/mysql/mysql.sock
# Here follows entries for some specific programs
# The MySQL server
[mysqld]
port = 3306
socket = /var/lib/mysql/mysql.sock
skip-external-locking
key_buffer_size = 256M
max_allowed_packet = 1M
table_open_cache = 256
sort_buffer_size = 1M
read_buffer_size = 1M
read_rnd_buffer_size = 4M
myisam_sort_buffer_size = 64M
thread_cache_size = 8
query_cache_size= 16M
# Try number of CPU's*2 for thread_concurrency
thread_concurrency = 8
# 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
# Replication Master Server (default)
# binary logging is required for replication
log-bin=mysql-bin
# binary logging format - mixed recommended
binlog_format=mixed
# 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=<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
# 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 = <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>
#
# binary logging - not required for slaves, but recommended
#log-bin=mysql-bin
# Uncomment the following if you are using InnoDB tables
#innodb_data_home_dir = /var/lib/mysql
#innodb_data_file_path = ibdata1:10M:autoextend
#innodb_log_group_home_dir = /var/lib/mysql
# You can set .._buffer_pool_size up to 50 - 80 %
# of RAM but beware of setting memory usage too high
#innodb_buffer_pool_size = 256M
#innodb_additional_mem_pool_size = 20M
# Set .._log_file_size to 25 % of buffer pool size
#innodb_log_file_size = 64M
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 50
[mysqldump]
quick
max_allowed_packet = 16M
[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates
[myisamchk]
key_buffer_size = 128M
sort_buffer_size = 128M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout
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