Mysql 很多睡眠过程

我的mysql服务器仍然有问题。似乎自从我优化了它之后，表在增长，现在又变得非常缓慢。我不知道如何优化更多

mySQL服务器有48GB的RAM，mysqld大约使用8个，大多数表都是innoDB

该网站有大约2000名在线用户。我还对每个查询运行explain，每个查询都被索引

mySQL进程：

my.cnf：

# The MySQL database server configuration file.
#
# You can copy this to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
#
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[client]
port            = 3306
socket          = /var/run/mysqld/mysqld.sock

# Here is entries for some specific programs
# The following values assume you have at least 32M ram

# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[mysqld_safe]
socket          = /var/run/mysqld/mysqld.sock
nice            = 0

[mysqld]
#
# * Basic Settings
#
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
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address            = 10.100.27.30
#
# * Fine Tuning
#
key_buffer              = 64M
key_buffer_size = 512M
max_allowed_packet      = 16M
thread_stack            = 128K
thread_cache_size       = 8
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched
myisam-recover          = BACKUP
max_connections        = 1000
table_cache            = 1000
join_buffer_size        = 2M
tmp_table_size          = 2G
max_heap_table_size     = 2G
innodb_buffer_pool_size = 3G
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     = 10
ft_min_word_len = 3
#thread_concurrency     = 10
#
# * Query Cache Configuration
#
query_cache_limit       = 1M
query_cache_size        = 512M
#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
#log            = /var/log/mysql/mysql.log
#
# Error logging goes to syslog. This is a Debian improvement :)
#
# Here you can see queries with especially long duration
#log_slow_queries       = /var/log/mysql/mysql-slow.log
#long_query_time = 2
#log-queries-not-using-indexes
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
#       other settings you may need to change.
#server-id              = 1
#log_bin                        = /var/log/mysql/mysql-bin.log
expire_logs_days        = 10
max_binlog_size         = 100M
#binlog_do_db           = include_database_name
#binlog_ignore_db       = include_database_name
#
# * BerkeleyDB
#
# Using BerkeleyDB is now discouraged as its support will cease in 5.1.12.
skip-bdb
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
# You might want to disable InnoDB to shrink the mysqld process by circa 100MB.
#skip-innodb
#
# * Security Features
#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
#
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem



[mysqldump]
quick
quote-names
max_allowed_packet      = 16M

[mysql]
#no-auto-rehash # faster start of mysql but no tab completition

[isamchk]
key_buffer              = 16M

#
# * NDB Cluster
#
# See /usr/share/doc/mysql-server-*/README.Debian for more information.
#
# The following configuration is read by the NDB Data Nodes (ndbd processes)
# not from the NDB Management Nodes (ndb_mgmd processes).
#
# [MYSQL_CLUSTER]
# ndb-connectstring=127.0.0.1


#
# * IMPORTANT: Additional settings that can override those from this file!
#   The files must end with '.cnf', otherwise they'll be ignored.
#
!includedir /etc/mysql/conf.d/

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我在您的流程列表页面上刷新了几次，我经常看到的查询包括“selecttablename.*”

您需要该表中的每一列吗？如果不是的话，这可能会有所帮助

除非您的服务器资源紧张，否则我不会太担心休眠进程。它们通常不会消耗大量资源。但是，如果您确实希望手动设置杀死它们之前的时间量，则可以在配置文件中执行以下操作：

[mysqld]
wait_timeout=20

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在上下文之外，您是如何生成这个mySQL进程PHP页面的？请在这里发布SHOW CREATE TABLE，因为我们需要了解您的索引是如何优化的。您可以提供有关服务器的更多信息吗？虚拟化？操作系统、交换、IO统计、网络统计等。应用程序的设置。表的增长可能是因为您在优化过程中从MyIsam切换到innoDB。InnoDB表比myisam表大。是否启用了慢速查询日志记录？那可能会吐出一些有趣的东西