Lenteur lors de l'intégration d'un fichier CSV dans une base SQL

Bonjour à tous,

Je me permets de vous contacter car nous nous retrouvons devant une impasse sur notre serveur dédié (hébergé).

Dans le cadre de notre activité, nous sommes amenés à suivre un ensemble d'indicateurs statistiques. Pour ce faire, nous avons développé en PHP un outil spécifique qui s'appuie sur une "grosse" table SQL.

L'alimentation de cette table SQL s'effectue par l'upload d'un fichier CSV (qui est une extraction de l'outil de gestion métier).

Notre problème est le suivant :

Avec le même code PHP sur notre environnement de développement (un imac avec MAMP), nous arrivons à intégrer (INSERT ou UPDATE) dans la table SQL entre 500 et 1000 lignes par seconde.

Dans notre environnement de recette (sur serveur dédié et hébergé donc) nous n'intégrons que 7 à 8 lignes à la seconde... Pourtant la RAM du serveur de recette est de 32 Go (bien supérieure à celle de notre environnement de DEV).

Malheureusement, nous ne maitrisons absolument pas l'administration serveur et n'arrivons pas à trouver l'anomalie, néanmoins, l'interface d'administration du serveur montre que la charge CPU est quai-inexistante (inférieur à 7 % tout au long de la journée). La RAM quant à elle semble "capée" à 5% toute la journée (même la nuit).

J'ai retrouvé sur le serveur le fichier my.cnf. Peut-être que le problème vient d'une mauvaise configuration?

Merci d'avance pour toute aide que vous pourrez nous apporter.

Bien cordialement,

Marc.

#
# 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/se...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]
server-id=2

#
# * 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 = 16M
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 = 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.
# 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/