Opublikowano:

Pomoc w optymalizacji MySQL’a :(

Witam, potrzebuje pomocy z optymalizacją MySQL. Szczerze nie znam się na optymalizacji… Na serwerze znajdują się 3 fora na silniku vB jedno 200 tyś userów, drugie 11 tyś userów a trzecie małe 3 tyś. – Kimsufi Q-1T

To wynik z MySQLTuner

Cytat:

>> MySQLTuner 1.0.1 – Major Hayden <major@mhtx.net>
>> Bug reports, feature requests, and downloads at http://mysqltuner.com/
>> Run with ‚–help’ for additional options and output filtering

——– General Statistics ————————————————–
[–] Skipped version check for MySQLTuner script
[OK] Currently running supported MySQL version 5.0.51a-24+lenny4
[!!] Switch to 64-bit OS – MySQL cannot currently use all of your RAM

——– Storage Engine Statistics ——————————————-
[–] Status: +Archive -BDB -Federated +InnoDB -ISAM -NDBCluster
[–] Data in MyISAM tables: 1008M (Tables: 918)
[–] Data in InnoDB tables: 24M (Tables: 30)
[–] Data in MEMORY tables: 379K (Tables: 12)
[!!] Total fragmented tables: 139

——– Performance Metrics ————————————————-
[–] Up for: 6m 50s (29K q [71.966 qps], 2K conn, TX: 1B, RX: 8M)
[–] Reads / Writes: 87% / 13%
[–] Total buffers: 58.0M global + 2.6M per thread (100 max threads)
[OK] Maximum possible memory usage: 320.5M (8% of installed RAM)
[OK] Slow queries: 0% (0/29K)
[OK] Highest usage of available connections: 12% (12/100)
[!!] Key buffer size / total MyISAM indexes: 16.0M/574.0M
[!!] Key buffer hit rate: 81.8% (237K cached / 43K reads)
[OK] Query cache efficiency: 64.7% (13K cached / 21K selects)
[!!] Query cache prunes per day: 191133
[OK] Sorts requiring temporary tables: 0% (10 temp sorts / 1K sorts)
[!!] Joins performed without indexes: 6
[OK] Temporary tables created on disk: 1% (21 on disk / 1K total)
[OK] Thread cache hit rate: 99% (12 created / 2K connections)
[!!] Table cache hit rate: 1% (64 open / 6K opened)
[OK] Open file limit used: 11% (121/1K)
[OK] Table locks acquired immediately: 99% (12K immediate / 12K locks)
[!!] InnoDB data size / buffer pool: 24.3M/8.0M

——– Recommendations —————————————————–
General recommendations:
Run OPTIMIZE TABLE to defragment tables for better performance
MySQL started within last 24 hours – recommendations may be inaccurate
Enable the slow query log to troubleshoot bad queries
Adjust your join queries to always utilize indexes
Increase table_cache gradually to avoid file descriptor limits
Variables to adjust:
key_buffer_size (> 574.0M)
query_cache_size (> 16M)
join_buffer_size (> 128.0K, or always use indexes with joins)
table_cache (> 64)
innodb_buffer_pool_size (>= 24M)


A to mój my.conf

Cytat:

#
# 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…-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 = 127.0.0.1
#
# * Fine Tuning
#
key_buffer = 16M
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 = 100
#table_cache = 64
#thread_concurrency = 10
#
# * Query Cache Configuration
#
query_cache_limit = 1M
query_cache_size = 16M
#
# * 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/