我正在使用centos7作爲我的服務器,當運行一個php頁面時,我發現mysql使用htop運行了大約4個進程,知道我的線程併發性爲1,並且只有一個組應根據my.conf太運行,但服務器運行使用CPU的處理能力的至少兩個實例中,有時達到2400%的CPU功率mysql的多個實例正在運行 - centos7
my.conf
[client]
port = 3306
socket = /var/lib/mysql/mysql.sock
[mysqld_safe]
innodb_buffer_pool_size=3000M
innodb_additional_mem_pool_size=8500K
innodb_log_buffer_size=20G
innodb_thread_concurrency=10
innodb_file_per_table=1
[mysqld]
log-slow-queries = /var/log/mysql-slow.log
long_query_time = 1
local-infile=0
datadir=/var/lib/mysql
user=mysql
symbolic-links=0
max_connections = 400
wait_timeout = 60
query-cache-type = 0
query-cache-size = 128M
query_cache_size = 0
query_cache_limit = 0
thread_cache_size = 128
tmp_table_size = 2048M
max_heap_table_size = 2048M
join_buffer_size = 40M
innodb_file_per_table=ON
table_open_cache = 1024
port = 3306
socket = /var/lib/mysql/mysql.sock
skip-external-locking
key_buffer_size = 1024M
max_allowed_packet = 268435456
sort_buffer_size = 2M
read_buffer_size = 2M
read_rnd_buffer_size = 8M
myisam_sort_buffer_size = 512M
query_cache_size = 0
thread_concurrency = 1
innodb_buffer_pool_size = 3024M
innodb_additional_mem_pool_size = 40M
innodb_log_buffer_size = 320M
[mysqldump]
quick
max_allowed_packet = 32M
[mysql]
no-auto-rehash
[myisamchk]
key_buffer_size = 512M
sort_buffer_size = 512M
read_buffer = 4M
write_buffer = 4M
[mysqlhotcopy]
interactive-timeout
table_cache = 1536
table_definition_cache = 1536
HTOP輸出
1743 eseed 20 0 500M 21448 12208 S 0.0 0.1 0:00.15 php-fpm: pool x.com
1412 mysql 20 0 5578M 815M 10132 S 0.0 2.5 4:26.02 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/lib/mysql/lnw2-g8hk.a 1582 mysql 20 0 5578M 815M 10132 S 0.0 2.5 1:45.77 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/lib/mysql/lnw2-g8hk.a 1518 apache 20 0 2205M 9472 2632 S 0.0 0.0 0:00.20 /usr/sbin/httpd -DFOREGROUND
1545 apache 20 0 2205M 9472 2632 S 0.0 0.0 0:00.16 /usr/sbin/httpd -DFOREGROUND
720 nginx 20 0 38032 3732 1316 S 0.0 0.0 0:00.06 nginx: worker process
1105 apache 20 0 989M 9668 2952 S 0.0 0.0 0:00.16 /usr/sbin/httpd -DFOREGROUND
1065 apache 20 0 2205M 9432 2628 S 0.0 0.0 0:00.17 /usr/sbin/httpd -DFOREGROUND
382 root 20 0 380M 13424 8004 S 0.0 0.0 0:00.09 php-fpm: master process (/etc/php-fpm.conf)
1058 apache 20 0 1373M 10056 3044 S 0.0 0.0 0:00.18 /usr/sbin/httpd -DFOREGROUND
1146 apache 20 0 2205M 9432 2628 S 0.0 0.0 0:00.15 /usr/sbin/httpd -DFOREGROUND
1427 mysql 20 0 5578M 815M 10132 S 0.0 2.5 0:00.02 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/lib/mysql/lnw2-g8hk.a 1461 mysql 20 0 5578M 815M 10132 S 0.0 2.5 0:44.38 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/lib/mysql/lnw2-g8hk.a 1742 eseed 20 0 381M 9248 2908 S 0.0 0.0 0:00.10 php-fpm: pool dev.x.com
952 root 20 0 3835M 10824 3584 S 0.0 0.0 0:00.18 Passenger core
1432 mysql 20 0 5578M 815M 10132 S 0.0 2.5 0:00.02 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/lib/mysql/lnw2-g8hk.a
381 root 20 0 498M 25160 19552 S 0.0 0.1 0:00.11 php-fpm: master process (/opt/plesk/php/7.0/etc/php-fpm.conf)
1425 mysql 20 0 5578M 815M 10132 S 0.0 2.5 0:00.02 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/lib/mysql/lnw2-g8hk.a 1426 mysql 20 0 5578M 815M 10132 S 0.0 2.5 0:00.02 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/lib/mysql/lnw2-g8hk.a
我的數據庫表是MYISAM,而不是INNODB,如果它有幫助 – JenuRudan
我猜問題不是服務器mysql,而是內部執行的例程。嘗試解決請求,檢查日誌,表格大小,記憶容量......你需要以這種方式進行調查。問候。 – 2017-10-08 11:01:07
是的,我知道,但爲什麼不止一個實例首先運行? – JenuRudan