PB Optimisation my.cnf

Bonjour,

J'ai un gros probleme au niveau de la configuration de mon serveur, et n’étant pas spécialiste j'avoue ne pas savoir comment m'en sortir.

J'ai le processeur à 100% d'utilisation et la ram à 5% (48go de ram dispo)

Voila mon my.cnf

Code:

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[client]   port = 3306 socket = /var/run/mysqld/mysqld.sock character-sets-dir=/usr/share/mysql/charsets default-character-set=latin1   [php-cgi] character-sets-dir=/usr/share/mysql/charsets default-character-set=latin1   [mysql] character-sets-dir=/usr/share/mysql/charsets default-character-set=latin1   [mysqladmin] character-sets-dir=/usr/share/mysql/charsets default-character-set=latin1   [mysqlcheck] character-sets-dir=/usr/share/mysql/charsets default-character-set=latin1   [mysqldump] character-sets-dir=/usr/share/mysql/charsets default-character-set=latin1   [mysqlimport] character-sets-dir=/usr/share/mysql/charsets default-character-set=latin1   [mysqlshow] character-sets-dir=/usr/share/mysql/charsets default-character-set=latin1   [myisamchk] character-sets-dir=/usr/share/mysql/charsets   [myisampack] character-sets-dir=/usr/share/mysql/charsets   [mysqld_safe] err-log = /var/log/mysql/mysql.err   [mysqld] character-set-server = latin1 init-connect='SET NAMES latin1' default-character-set = latin1 user = mysql port = 3306 socket = /var/run/mysqld/mysqld.sock pid-file = /var/run/mysqld/mysqld.pid log-error = /var/log/mysql/mysqld.err basedir = /usr datadir = /var/lib/mysql skip-locking key_buffer = 32M max_allowed_packet = 2M table_cache = 70K sort_buffer_size = 1024K net_buffer_length = 16K read_buffer_size = 512K read_rnd_buffer_size = 1024K myisam_sort_buffer_size = 16M language = /usr/share/mysql/english   set-variable=local-infile=0   max_connections = 100 wait_timeout = 15 interactive_timeout = 15   query-cache-type = 1   query_cache_limit = 1024M   query_cache_size = 1024M   log-slow-queries = /var/log/mysql/slow.log long_query_time = 5   log-queries-not-using-indexes = /var/log/mysql/noindex.log   thread_cache_size = 256   tmp_table_size = 5G max_heap_table_size = 5G   key_buffer_size = 512M   join_buffer_size = 1024M   concurrent_insert = 2   low_priority_updates = 1   server-id = 1   tmpdir = /home/tmp/   skip-innodb   [mysqldump] quick max_allowed_packet = 16M   [mysql]   [isamchk] key_buffer = 20M sort_buffer_size = 20M read_buffer = 2M write_buffer = 2M   [myisamchk] key_buffer = 20M sort_buffer_size = 20M read_buffer = 2M write_buffer = 2M   [mysqlhotcopy] interactive-timeout

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Et voila un ./mysqltuner

Citation:

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-------- General Statistics --------------------------------------------------
[--] Skipped version check for MySQLTuner script
[OK] Currently running supported MySQL version 5.0.44-log
[OK] Operating on 64-bit architecture

-------- Storage Engine Statistics -------------------------------------------
[--] Status: -Archive -BDB -Federated -InnoDB -ISAM -NDBCluster
[--] Data in MyISAM tables: 1G (Tables: 482)
[!!] Total fragmented tables: 7

-------- Security Recommendations -------------------------------------------
[OK] All database users have passwords assigned

-------- Performance Metrics -------------------------------------------------
[--] Up for: 13m 18s (10M q [13K qps], 9K conn, TX: 359M, RX: 76M)
[--] Reads / Writes: 99% / 1%
[--] Total buffers: 6.5G global + 1.0G per thread (100 max threads)
[!!] Maximum possible memory usage: 106.8G (226% of installed RAM)
[OK] Slow queries: 0% (182/10M)
[!!] Highest connection usage: 100% (101/100)
[OK] Key buffer size / total MyISAM indexes: 512.0M/155.2M
[OK] Key buffer hit rate: 100.0% (692M cached / 31K reads)
[!!] Query cache efficiency: 11.8% (669K cached / 5M selects)
[OK] Query cache prunes per day: 0
[OK] Sorts requiring temporary tables: 0% (2 temp sorts / 15K sorts)
[!!] Joins performed without indexes: 905799
[OK] Temporary tables created on disk: 0% (3K on disk / 464K total)
[OK] Thread cache hit rate: 98% (101 created / 9K connections)
[!!] Table cache hit rate: 2% (767 open / 31K opened)
[OK] Open file limit used: 2% (1K/65K)
[OK] Table locks acquired immediately: 99% (5M immediate / 5M locks)

-------- Recommendations -----------------------------------------------------
General recommendations:
Run OPTIMIZE TABLE to defragment tables for better performance
MySQL started within last 24 hours - recommendations may be inaccurate
Reduce your overall MySQL memory footprint for system stability
Reduce or eliminate persistent connections to reduce connection usage
Adjust your join queries to always utilize indexes
Increase table_cache gradually to avoid file descriptor limits
Variables to adjust:
*** MySQL's maximum memory usage is dangerously high ***
*** Add RAM before increasing MySQL buffer variables ***
max_connections (> 100)
wait_timeout (< 15)
interactive_timeout (< 15)
query_cache_limit (> 1G, or use smaller result sets)
join_buffer_size (> 1024.0M, or always use indexes with joins)
table_cache (> 32712)

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