2016-12-28 84 views
0

我將一個運行在Java上的應用程序(一個AS400競賽野獸上的一個應用程序)傳遞給一個運行在Unix服務器上的MariaDB BDD。 我有一個表演問題。 新的Unix服務器有兩個處理器* 1核心和5GB的RAM。我可以更多地談判兩顆心,但幾乎沒有超越。 該應用程序可以由100個用戶/天和10-15個活躍用戶同時請求。 我的主表有20000條記錄(熱線票數),但從屬表可以達到約150 000條記錄。 我使用InnoDB引擎,因爲我有義務保留外鍵的約束。 我創建了最合理的索引。 每張桌子平均有50個字段。 (Decimal和varchar 10或20) 問題是我有5個視圖查詢,每個視圖使用4個表(請參閱其他視圖),它非常貪心,每個表有幾萬條記錄。除非我完全重寫應用程序,否則幾乎無法修改這些查詢。 (我提醒你,這只是BDD的改變)。 任何人都可以告訴我my.cnf的設置是否正確。我調整了在網上尋找信息,但我不是專家。參數數據庫MariaDB my.cnf

# 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/ 

問候

+0

您是否使用不同的設置自行運行測試? –

+0

您的用戶是否遇到性能問題?你知道MariaDB不能處理所謂的*物化視圖*開箱即用嗎?您是否知道MariaDB不能在查詢中爲每個表使用多個索引,因此通常可以從精心挑選的複合索引中獲益?優化的最佳方法可能是調查* slow query log *,確定最慢的查詢,並通過添加適當的索引來優化它們。 –

+0

從DB2/AS400到MariaDB的端口正在運行非常酷! –

回答

0

更改這些:

tmp_table_size = 50M 
max_heap_table_size = 50M 
query_cache_size = 50m 
0

@邁克爾:是的,我跑了其他幾個測試。 @ rick:BDD =數據庫,心臟是CPU的核心。對不起,由於法文錯誤翻譯

@瑞克你爲什麼要將這些參數設置爲較低的值?

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