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我的数据库服务器出现负载问题（双四核 50 GB 内存）

平均负载：4.26、6.78、11.25

这是当前的my.cnf，我可以优化它吗？

[client]
port            = 3306
socket          = /var/run/mysqld/mysqld.sock

[mysqld_safe]
socket          = /var/run/mysqld/mysqld.sock
nice            = 0

[mysqld]
user            = mysql
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
port            = 3306
basedir         = /usr
datadir         = /var/lib/mysql
tmpdir          = /tmp
language        = /usr/share/mysql/english
skip-external-locking

key_buffer              = 150M
key_buffer_size = 512M
max_allowed_packet      = 16M
thread_stack            = 128K
thread_cache_size       = 128
open-files              = 8192

myisam-recover          = BACKUP
max_connections        = 1000
table_cache            = 8096
join_buffer_size        = 2M
tmp_table_size          = 10G
max_heap_table_size     = 10G
innodb_buffer_pool_size = 10G
innodb_additional_mem_pool_size = 128M
innodb_log_file_size = 100M
log-slow-queries        = /var/log/mysql/slow.log
sort_buffer_size        = 5M
net_buffer_length       = 5M
read_buffer_size        = 2M
read_rnd_buffer_size    = 12M
thread_concurrency     = 16
ft_max_word_len = 30
ft_min_word_len = 2
#thread_concurrency     = 10

query_cache_limit       = 4M
query_cache_size        = 512M

该网站有大约 2000 名在线用户。

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2 回答 2

0

您使用mytop和mysqltuner来分析使用 mysql 资源（RAM 和 CPU）。

也启用记录慢查询的选项：

log_slow_queries = /var/log/mysql/mysql-slow.log
long_query_time = 3

并查看有关ntpd服务的这篇文章：

MySQL 高 CPU 使用率

我有一个用于高交易率的专用服务器：

max_allowed_packet=16M
key_buffer_size=8M
innodb_additional_mem_pool_size=10M
innodb_buffer_pool_size=512M
join_buffer_size=40M
table_open_cache=1024
query_cache_size=40M
table_definition_cache=256
innodb_additional_mem_pool_size=10M
key_buffer_size=16M
max_allowed_packet=32M
max_connections = 300
query_cache_limit = 10M
log_slow_queries = /var/log/mysql/mysql-slow.log
long_query_time = 3

问候。

于 2012-12-10T05:13:14.477 回答
0

我总是从 a 开始watch "mysqladmin pr -vv"，看看哪些语句是最差的......然后你应该知道要调整什么变量......大多数时候它是一个缺失的索引。

于 2010-09-30T20:17:46.587 回答