Mysql 5.6.10配置

DB服务器

16 cores 
63Gb RAM 
CentOS release 6.8

等/ my.cnf中

[mysqld]
pid_file=/var/lib/mysql/fatty01.pid

datadir=/var/lib/mysql 
socket=/var/lib/mysql/mysql.sock
user=mysql

innodb_buffer_pool_size = 50G
innodb_log_file_size = 2G
innodb_flush_log_at_trx_commit = 0
sync_binlog = 0
innodb_flush_method = O_DIRECT
innodb_buffer_pool_instances = 16
innodb_thread_concurrency = 16
skip_name_resolve = 1 
innodb_io_capacity = 4000
innodb_io_capacity_max = 6000
innodb_buffer_pool_dump_at_shutdown = 1
innodb_buffer_pool_load_at_startup = 1
query_cache_size = 0
query_cache_type = OFF
innodb_checksum_algorithm = crc32
table_open_cache_instances = 16
innodb_read_io_threads = 20
innodb_write_io_threads = 10
max_connections = 700

when we have peaks of 3000 concurrent clients the mysqld does not seem
to pull all the resources posibles from the machine.

我看到负载在40但cpu似乎没有超过60％

That reflects in the front end server

**
我的问题很明确,如何在不影响服务器的情况下提高性能？另外,如何减少前端服务器中的MYSQL等待时间,因为数据库服务器端的配置显然存在问题.
**

**

UPDATE After research the problem seem to be in the slow queries, so I
guess this configuration is optimal for this hardware

**

解决方法:

不,它不太可能是一个简单的调整改变.正如我所说,my.cnf看起来不错 – 基于有限的信息.

根据图表,突然发生了一些事情.或者是一连串的活动.

打开slowlog,设置long_query_time = 1,等到问题再次发生,然后使用pt-query-digest告诉你顽皮的查询.

标签：mysql,centos,database-performance,my-cnf
来源： https://codeday.me/bug/20190628/1310457.html