1. 关闭 SELinux

vim /etc/selinux/config 更改 SELINUX=enforcing 为　SELINUX=disabled

2. 更改 IO Schedule,　对于 SSD 硬盘无需更改

echo deadline > /sys/block/sda/queue/scheduler

3. 更改 ulimit

vim /etc/security/limits.conf

* soft nofile 65535

* hard nofile 65535

root soft nofile 65535

root hard nofile 65535

4. 更改内核参数

vim /etc/sysctl.conf

net.core.netdev_max_backlog = 3000

net.core.optmem_max = 20480

net.core.rmem_default = 8388608

net.core.rmem_max = 8388608

net.core.wmem_default = 1048576

net.core.wmem_max = 1048576

net.ipv4.tcp_mem = 786432 1048576 1572864

net.ipv4.tcp_rmem = 32768 4194304 8388608

net.ipv4.tcp_wmem = 8192 4194304 8388608

net.ipv4.tcp_max_syn_backlog = 2048

net.ipv4.tcp_retries2 = 5

net.ipv4.tcp_fin_timeout = 30

net.ipv4.tcp_keepalive_time = 3600

net.ipv4.tcp_keepalive_intvl = 30

net.ipv4.tcp_keepalive_probes = 9

net.ipv4.tcp_max_tw_buckets = 6000

net.ipv4.ip_local_port_range = 10240 61000

fs.file-max = 6815744

vm.swappiness = 0

kernel.sem = 250 32000 100 128

kernel.shmmni = 4096

kernel.ctrl-alt-del = 1

5. MySQL 5.6.10 数据库自身设置

＃ 以下针对 24G 内存服务器设置 my.cnf

# For advice on how to change settings please see

# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html

[mysqld]

# Remove leading # and set to the amount of RAM for the most important data

# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.

socket = /tmp/mysql.sock

max_connections = 1024

max_connect_errors = 10000

max_allowed_packet = 16M

skip-name-resolve

lower_case_table_names = 1

thread_cache = 128

table_open_cache = 1024

query_cache_type = 1

query_cache_size = 128M

join_buffer_size = 8M

sort_buffer_size = 2M

read_buffer_size = 2M

read_rnd_buffer_size = 2M

max_heap_table_size = 128M

tmp_table_size = 128M

tmpdir = /dev/shm

binlog_cache_size = 12M

max_binlog_size = 512M

expire_logs_days = 3

innodb_buffer_pool_size = 16G

innodb_use_sys_malloc = 1

# Set .._log_file_size to 25 % of buffer pool size

innodb_log_file_size = 128M

innodb_log_buffer_size = 32M

innodb_flush_log_at_trx_commit = 2

innodb_flush_method = O_DIRECT

innodb_lock_wait_timeout = 50

# Remove leading # to turn on a very important data integrity option: logging

# changes to the binary log between backups.

# log_bin

# These are commonly set, remove the # and set as required.

# basedir = .....

# datadir = .....

# port = .....

# server_id = .....

# socket = .....

# Remove leading # to set options mainly useful for reporting servers.

# The server defaults are faster for transactions and fast SELECTs.

# Adjust sizes as needed, experiment to find the optimal values.

# join_buffer_size = 128M

# sort_buffer_size = 2M

# read_rnd_buffer_size = 2M

# slow_query_log = 1

# slow_query_log_file = slow.log

# long_query_time = 1

# log_queries_not_using_indexes

# log-bin = mysql-bin

# server-id = 1

# innodb_flush_log_at_trx_commit = 1

# sync_binlog = 1

sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

附上 MySQL 5.6.10 编译参数:

tar zxvf mysql-5.6.10.tar.gz

cd mysql-5.6.10

cmake . -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -DWITH_INNOBASE_STORAGE_ENGINE=1 -DMYSQL_TCP_PORT=3306 -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_general_ci -DWITH_DEBUG=0 -DCURSES_LIBRARY=/usr/lib64/libncurses.so -DCURSES_INCLUDE_PATH=/usr/include

make

make install

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