I host a wordpress site on my server which has 2GB mem, I have used some cache plugin, but when I type ps -eo "%C : %p : %z : %a" | sort -k5 -nr in SSH, I see the httpd memory usage is very high.

15.7 :  3131 : 4732740 : /usr/local/mysql/bin/mysqld
 0.5 :  3356 : 515860 : /usr/sbin/httpd
 0.6 :  3363 : 509308 : /usr/sbin/httpd
 0.6 :  3333 : 509308 : /usr/sbin/httpd
 0.5 :  3367 : 509308 : /usr/sbin/httpd
 0.5 :  3361 : 509308 : /usr/sbin/httpd
 0.5 :  3358 : 509308 : /usr/sbin/httpd
 0.5 :  3338 : 509308 : /usr/sbin/httpd
 0.4 :  3366 : 509308 : /usr/sbin/httpd
 0.3 :  3370 : 509308 : /usr/sbin/httpd
 0.3 :  3359 : 509308 : /usr/sbin/httpd
 0.0 :  3193 : 410980 : /usr/sbin/httpd
 ...

The server always dead. I have set memory in php.ini like this:

memory_limit = 768M
memory = 20M

Thanks for read.

I host a wordpress site on my server which has 2GB mem, I have used some cache plugin, but when I type ps -eo "%C : %p : %z : %a" | sort -k5 -nr in SSH, I see the httpd memory usage is very high.

15.7 :  3131 : 4732740 : /usr/local/mysql/bin/mysqld
 0.5 :  3356 : 515860 : /usr/sbin/httpd
 0.6 :  3363 : 509308 : /usr/sbin/httpd
 0.6 :  3333 : 509308 : /usr/sbin/httpd
 0.5 :  3367 : 509308 : /usr/sbin/httpd
 0.5 :  3361 : 509308 : /usr/sbin/httpd
 0.5 :  3358 : 509308 : /usr/sbin/httpd
 0.5 :  3338 : 509308 : /usr/sbin/httpd
 0.4 :  3366 : 509308 : /usr/sbin/httpd
 0.3 :  3370 : 509308 : /usr/sbin/httpd
 0.3 :  3359 : 509308 : /usr/sbin/httpd
 0.0 :  3193 : 410980 : /usr/sbin/httpd
 ...

The server always dead. I have set memory in php.ini like this:

memory_limit = 768M
memory = 20M