mysql и большое количество соединений

[coddex]

Здравствуйте! У меня стоит 8.04 серверная, на ней крутится один сайт с очень большим количеством посещений, ну и соответственно происходит куча соединений с mysql-сервером, иногда доходит до такой точки что mysql пишет:

Код: [Выделить]

Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (11) [2002]

An sql error occurred while fetching this page. Please contact an administrator if this problem persists.Как понимаю, где то стоит ограничение на количество подключений, как это исправить? и где вообще это исправить?

[drako]

В mysql:
max_connections
max_user_connections
В php:
mysql.allow_persistent
mysql.max_persistent
mysql.max_links

А вообще может затыкаться, например, из-за нехватки памяти или диск не справляется....

[coddex]

 /etc/php5/apache2/php.ini :

Код: [Выделить]

; Allow or prevent persistent links.
mysql.allow_persistent = On

; Maximum number of persistent links.  -1 means no limit.
mysql.max_persistent = -1

; Maximum number of links (persistent + non-persistent).  -1 means no limit.
mysql.max_links = -1
/etc/mysql/my.cnf :

Код: [Выделить]

key_buffer              = 16M
max_allowed_packet      = 16M
thread_stack            = 128K
thread_cache_size       = 8
#max_connections        = 100
#table_cache            = 64
#thread_concurrency     = 10
#
# * Query Cache Configuration
#
query_cache_limit       = 1M
query_cache_size        = 16Mкак бы нет ограничений, но, в mysql сделал запрос

Код: [Выделить]

show variables like "max_connections";показало - 100, раскоментировал этот параметр, поставил 500, ребутнул mysql - посмотрим что будет

[coddex]

все равно не помогло ....
вот полный листинг файла /etc/mysql/my.cnf:

(Нажмите, чтобы показать/скрыть)

Код: [Выделить]

#
# 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
#

#
# * IMPORTANT
#   If you make changes to these settings and your system uses apparmor, you may
#   also need to also adjust /etc/apparmor.d/usr.sbin.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
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address            = 127.0.0.1
#
# * Fine Tuning
#
key_buffer              = 32M
max_allowed_packet      = 16M
thread_stack            = 128K
thread_cache_size       = 8
max_connections        = 1000
table_cache            = 512
#thread_concurrency     = 10
#
# * Query Cache Configuration
#
query_cache_limit       = 16M
query_cache_size        = 64M
#
# * 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              = 32M

#
# * 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/



может кто нибудь подскажет как его оптимизировать? ...  на сервере стоит Intel(R) Pentium(R) 4 CPU 2.40GHz и оперативки 1,5Gb, на нем крутится только лишь один очень посещаемый сайт с одной БД, больше на нем ничего нет. Установленная версия Ubuntu - 8.04

[Дмитрий Бо]

Простыню — под спойлер!