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我有一個Ubuntu的服務器和10個網站不同框架/ CMS。Apache的CPU 100％時，查詢數據庫
我的問題是，當我打開一個網站與一個大的CMS與MySQL DB集成，使用100％CPU的Apache2，在這些網站我有一個頁面速度10-20秒（呈現HTML頁面），我真的不知道爲什麼。 （但是沒有MySQL連接的所有PHP框架都可以正常工作）。
我的服務器支持經理，我們看到在我的服務器運行良好（無I/O問題或其他），我們認爲這是在阿帕奇/ MySQL的配置問題。
我沒有應聲數據庫表和優化所有InnoDB表。
這是當我從我的瀏覽器加載這個緩慢的CMS一個top快照：
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
13307 www-data 20 0 90116 42m 22m R 100 4.2 0:15.23 apache2
2224 root 20 0 37932 8148 1724 S 8 0.8 212:21.99 newrelic-daemon
13422 mysql 20 0 186m 47m 6280 S 0 4.7 0:11.20 mysqld
13889 root 20 0 2640 1132 860 R 0 0.1 0:00.03 top
1 root 20 0 2796 1124 792 S 0 0.1 0:06.28 init
NewRelic的截圖問題（不僅與WordPress的，但所有CMS）：Newrelic screenshot
我的CPU信息：
$ head /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2670 0 @ 2.60GHz
stepping : 7
cpu MHz : 2600.086
cache size : 20480 KB
fdiv_bug : no
hlt_bug : no
我的記憶信息：
$ head /proc/meminfo
MemTotal: 1028476 kB
MemFree: 571424 kB
Buffers: 17920 kB
Cached: 273312 kB
SwapCached: 824 kB
Active: 232768 kB
Inactive: 180264 kB
Active(anon): 147336 kB
Inactive(anon): 5292 kB
Active(file): 85432 kB
我的Apache配置：
LockFile ${APACHE_LOCK_DIR}/accept.lock
PidFile ${APACHE_PID_FILE}
Timeout 300
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 15
<IfModule mpm_prefork_module>
StartServers 2
MinSpareServers 5
MaxSpareServers 10
MaxClients 50
MaxRequestsPerChild 0
</IfModule>
<IfModule mpm_worker_module>
StartServers 2
MinSpareThreads 25
MaxSpareThreads 75
ThreadLimit 64
ThreadsPerChild 25
MaxClients 150
MaxRequestsPerChild 0
</IfModule>
<IfModule mpm_event_module>
StartServers 2
MinSpareThreads 5
MaxSpareThreads 10
ThreadLimit 64
ThreadsPerChild 25
MaxClients 50
MaxRequestsPerChild 0
</IfModule>
User ${APACHE_RUN_USER}
Group ${APACHE_RUN_GROUP}
AccessFileName .htaccess
<Files ~ "^\.ht">
Order allow,deny
Deny from all
Satisfy all
</Files>
DefaultType text/plain
HostnameLookups Off
ErrorLog ${APACHE_LOG_DIR}/error.log
LogLevel warn
Include mods-enabled/*.load
Include mods-enabled/*.conf
Include httpd.conf
Include ports.conf
LogFormat "%v:%p %h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" vhost_combined
LogFormat "%h %l %u %t \"%r\" %>s %O \"%{Referer}i\" \"%{User-Agent}i\"" combined
LogFormat "%h %l %u %t \"%r\" %>s %O" common
LogFormat "%{Referer}i -> %U" referer
LogFormat "%{User-agent}i" agent
Include conf.d/
Include sites-enabled/
MySQL的配置：
[client]
port = 3306
socket = /var/run/mysqld/mysqld.sock
[mysqld_safe]
socket = /var/run/mysqld/mysqld.sock
nice = 0
[mysqld]
user = mysql
socket = /var/run/mysqld/mysqld.sock
port = 3306
basedir = /usr
datadir = /var/lib/mysql
tmpdir = /tmp
skip-external-locking
key_buffer = 32M
max_allowed_packet = 16M
thread_stack = 192K
thread_cache_size = 286
interactive_timeout = 25
wait_timeout = 1000
myisam-recover = BACKUP
myisam_sort_buffer_size = 32MB
max_connections = 400
read_buffer_size = 1M
sort_buffer_size = 2M
table_cache = 400
thread_concurrency = 10
query_cache_limit = 64M
query_cache_size = 32M
general_log_file = /var/log/mysql/mysql.log
log_error = /var/log/mysql/error.log
log_slow_queries = /var/log/mysql/mysql-slow.log
long_query_time = 4
log-queries-not-using-indexes
log_bin = /var/log/mysql/mysql-bin.log
expire_logs_days = 10
max_binlog_size = 100M
bind-address = 127.0.0.1
[mysqldump]
quick
quote-names
max_allowed_packet = 16M
[mysql]
[isamchk]
key_buffer = 32M
!includedir /etc/mysql/conf.d/
如何解決這個問題？
首先嚐試在你的sql引擎上找到問題。調試或記錄運行緩慢的查詢。 – devanand