[w.....k]

Siemano,

pomimo dobrego serwera, bo 8GB ramu i proc 8 rdzeni @ 2.4Ghz mam wrażenie, że serwer baz danych mysql jest powolny przy dużej ilości zapytań, wydawało mi się, że na słabszym serwerze działało to szybciej...

czy jakiś specjalista mógłby ocenić mojego konfiga?

Zamieszczam go tutaj:

#
# 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](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
lc-messages-dir = /usr/share/mysql
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 = 128M
max_allowed_packet = 16M
thread_stack = 192K
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 = 100
table_cache = 8192
max_heap_table_size = 256M

#thread_concurrency = 10
#
# * Query Cache Configuration
#
query_cache_limit = 4M
query_cache_size = 512M

#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# As of 5.1 you can enable the log at runtime!
#general_log_file = /var/log/mysql/mysql.log
#general_log = 1
#
# Error log - should be very few entries.
#
log_error = /var/log/mysql/error.log
#
# 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
#
# * 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!
#
# * 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

#
# * 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/

#mysql #serwerownia #serwery #linux #ubuntu

[Taryfikatort]

@wujekmisiek: mamy tu ewidentne połączenie prostytucji z muzyką....
Coś tu #!$%@? nie gra!

[normanos]

@wujekmisiek: konfig to nie wszystko, rzekłbym nawet, że na ogół to najmniej tam jest do sprawdzania.

[marionez]

@wujekmisiek: mysqltuner.pl
sciagnij, odpal i zobacz czy sa jakies rekomendacje.

[w.....k]

mysqltuner.pl

@marionez: -------- Recommendations -----------------------------------------------------
General recommendations:
Run OPTIMIZE TABLE to defragment tables for better performance
Enable the slow query log to troubleshoot

[ksiak]

Jak już @normanos wspomniał wcześniej, konfiguracja to coś co sprawdza się na samym końcu. Skrypt który uruchomiłeś wskazuje na jakieś problemy z indeksami na joinach, moje rady:
1: sprawdź czy zapytania poprawnie używają joinów
2: jeżeli używasz MySQL starszego niż 5.6 to aktualizuj go
3: jeżeli obciążenie nie jest typu 'read mostly' rozważ opcje przejścia na InnoDB jeżeli używasz MyISAM