MySQL CPU Maxing

Question

現在、MySQLデータベースを使用しており、CPU使用率の600％で動作しているMySQLの問題が発生しています。

仕様：

2.3 GHzのIntelXeon®プロセッサーE5-2686のV4（Broadwellマイクロアーキテクチャ）プロセッサまたは2.4 GHzのIntelXeon®プロセッサーE5-2676 v3の（ハスウェル）プロセッサRAMの

8のvCPUの

32ギガバイト

100GBハードドライブ。

インスタンスは現在、Ubuntu 14.04.4 LTSとMySQLバージョン5.6.33-0ubuntu0.14.04.1-logを実行してAWSでホストされています。

my.cnfの設定下記をご覧ください：

# 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/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 
log_error=/var/log/mysql/mysql_error.log 

[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 
skip-external-locking 

innodb_io_capacity = 2000 
innodb_read_io_threads = 64 
innodb_thread_concurrency = 0 
innodb_write_io_threads = 64 
innodb_buffer_pool_size = 2G 
innodb_log_file_size = 1G 

# Skip reverse DNS lookup of clients 
skip-name-resolve 

# 
# 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  = 11G 
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 
query_cache_type = 0 
# 
# * 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/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  = 512M 

# 
# * 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/ 

Answer 1

まず、general_log、それはすべての時間を有効にする必要はありませんを無効にすることから始めます。一般的なログは、トラブルシューティングやテストの目的で非常に便利ですが、運用データベース上のパフォーマンスクエリキラーです。

また、混合エンジン（MyISAMとInnoDB）を使用している場合は、innodb_buffer_pool_sizeのメモリを増やすことができます。しかし、Innodbだけを使用している場合は、この変数をたとえば24Gに設定し、key_buffer_sizeを数百メガバイトに設定することができます。

MyIsamのみを使用している場合は、Innodbエンジンを完全に無効にして（skip-innodb）、key_buffer_sizeなどのMyisam memroy関連パラメータを増やしてください。

希望します。