Parameterdatenbank MariaDB my.cnf

Question

Ich übergebe eine App (Hotline für unsere Kunden), die auf Java mit einem DB2 BDD (auf einem AS400 Renntier) auf einem MariaDB BDD läuft, das auf einem Unix-Server läuft. Ich habe ein Performanceproblem. Der neue Unix-Server hat zwei Prozessoren * 1 Kern und 5 GB RAM. Ich könnte 2 Herzen mehr verhandeln, aber kaum darüber hinaus. Die App kann von 100 Benutzern/Tag und 10-15 aktiven Benutzern gleichzeitig angefordert werden. Meine Haupttabelle hat 20000 Datensätze (Anzahl der Hotline-Tickets), aber die abhängigen Tabellen können etwa 150 000 Datensätze erreichen. Ich benutze die InnoDB-Engine, weil ich verpflichtet bin, die Einschränkungen von Fremdschlüsseln zu beachten. Ich habe die logischsten Indizes erstellt. Jede Tabelle hat durchschnittlich 50 Felder. (Dezimal und varchar 10 oder 20) Das Problem ist, dass ich Abfragen mit 5 Ansichten habe, die jeweils 4 Tabellen verwenden (siehe andere Ansichten), die sehr gierig ist mit mehreren zehntausend Datensätze pro Tabelle. Ich kann diese Abfragen kaum ändern, wenn ich die App nicht komplett neu schreibe. (Ich erinnere Sie daran, dass dies nur eine Änderung von BDD ist). Kann mir jemand sagen, ob meine.cnf Einstellung OK ist oder nicht. Ich bin auf der Suche nach Informationen im Internet, aber ich bin kein Experte.

# MariaDB database server configuration file. 
# 
# You can copy this file 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 
# 
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 
lc_messages = en_US 
skip-external-locking 
lower_case_table_names = 1 
character-set-server=utf8 
collation-server=utf8_general_ci 
# 
# Instead of skip-networking the default is now to listen only on 
# localhost which is more compatible and is not less secure. 
bind-address  = 10.10.64.51 
# 
# * Fine Tuning 
# 
max_connections  = 100 
connect_timeout  = 5 
wait_timeout  = 600 
max_allowed_packet = 16M 
thread_cache_size  = 128 
#sort_buffer_size = 4M 
sort_buffer_size  = 8M 
bulk_insert_buffer_size = 16M 
#tmp_table_size  = 32M 
#max_heap_table_size = 32M 
#tmp_table_size   = 256M 
tmp_table_size   = 512M 
#max_heap_table_size  = 256M 
max_heap_table_size  = 512M 
# 
# * MyISAM 
# 
# This replaces the startup script and checks MyISAM tables if needed 
# the first time they are touched. On error, make copy and try a repair. 
myisam_recover_options = BACKUP 
key_buffer_size  = 128M 
#open-files-limit = 2000 
#table_open_cache = 400 
table_open_cache  = 600 
myisam_sort_buffer_size = 512M 
concurrent_insert = 2 
read_buffer_size = 2M 
#read_rnd_buffer_size = 1M 
read_rnd_buffer_size = 2M 
# 
# * Query Cache Configuration 
# 
# Cache only tiny result sets, so we can fit more in the query cache. 
#query_cache_limit  = 128K 
query_cache_limit    = 512K 
#query_cache_size  = 256M 
query_cache_size    = 512M 
#query_cache_type  = DEMAND 
# 
# * 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 logging goes to syslog due to /etc/mysql/conf.d/mysqld_safe_syslog.cnf. 
# 
# we do want to know about network errors and such 
log_warnings  = 2 
# 
# Enable the slow query log to see queries with especially long duration 
#slow_query_log[={0|1}] 
slow_query_log_file = /var/log/mysql/mariadb-slow.log 
long_query_time = 10 
#log_slow_rate_limit = 1000 
log_slow_verbosity = query_plan 

#log-queries-not-using-indexes 
#log_slow_admin_statements 
# 
# 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 
#report_host  = master1 
#auto_increment_increment = 2 
#auto_increment_offset = 1 
log_bin   = /var/log/mysql/mariadb-bin 
log_bin_index  = /var/log/mysql/mariadb-bin.index 
# not fab for performance, but safer 
#sync_binlog  = 1 
expire_logs_days = 10 
max_binlog_size   = 100M 
# slaves 
#relay_log  = /var/log/mysql/relay-bin 
#relay_log_index = /var/log/mysql/relay-bin.index 
#relay_log_info_file = /var/log/mysql/relay-bin.info 
#log_slave_updates 
#read_only 
# 
# If applications support it, this stricter sql_mode prevents some 
# mistakes like inserting invalid dates etc. 
#sql_mode  = NO_ENGINE_SUBSTITUTION,TRADITIONAL 
# 
# * 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! 
default_storage_engine = InnoDB 
# you can't just change log file size, requires special procedure 
#innodb_log_file_size = 50M 
#innodb_buffer_pool_size = 256M 
#innodb_buffer_pool_size = 512M 
innodb_buffer_pool_size = 1G 
innodb_log_buffer_size = 8M 
innodb_file_per_table = 1 
innodb_open_files = 400 
innodb_io_capacity = 400 
innodb_flush_method = O_DIRECT 
# 
# * 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 

# 
# * Galera-related settings 
# 
[galera] 
# Mandatory settings 
#wsrep_on=ON 
#wsrep_provider= 
#wsrep_cluster_address= 
#binlog_format=row 
#default_storage_engine=InnoDB 
#innodb_autoinc_lock_mode=2 
# 
# Allow server to accept connections on all interfaces. 
# 
#bind-address=0.0.0.0 
# 
# Optional setting 
#wsrep_slave_threads=1 
#innodb_flush_log_at_trx_commit=0 

[mysqldump] 
quick 
quote-names 
max_allowed_packet = 16M 

[mysql] 
#no-auto-rehash # faster start of mysql but no tab completion 

[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/ 

Mit freundlichen Grüßen

Answer 1

ändern diese:

tmp_table_size = 50M 
max_heap_table_size = 50M 
query_cache_size = 50m 

Answer 2

@ Mickael: ja ich mehrere andere Tests lief. @ rick: BDD = Datenbank, Herz ist der Kern der CPU. Sorry für schlechte Übersetzung aus Französisch

@ Rick warum setzen Sie diese Parameter auf niedrigere Werte?