Optimizing apache server load

Posted by Jevgeni Smirnov on Server Fault See other posts from Server Fault or by Jevgeni Smirnov
Published on 2012-03-27T07:47:47Z Indexed on 2012/03/27 11:31 UTC
Read the original article Hit count: 578

We have an issue with a dedicated server load.

We have 16 processors with 4 core @ 2.40GHz, if I understood correctly cat /proc/cpuinfo output.

Unfortunately, I don't have access to free -m or vmstat.

But from top I got that we have 24 GB.

And snapshot from top about processes: Top

As far as I see, memory is not used at all. But the cpu is used heavily. Apache consumes most of CPU.

Another useful piece of information:

Every 1.0s: ps u -C httpd,mysqld,php                                                                                                                                                                                                                                                                                                           Tue Mar 27 10:48:19 2012

USER         PID %CPU %MEM    VSZ   RSS TTY  STAT START   TIME COMMAND
root        7476  0.0  0.1 446808 37880 ?        SNs  Mar06   0:43 /opt/zone/sbin/httpd -D SSL -D SLOT_ID0 -f /etc/opt/zone/apache/ssl_httpd.conf
mysql      36061 41.6  2.1 1113672 529876 ?  SNl  Feb20 21503:48 /opt/zone/sbin/mysqld --basedir=/opt/zone --datadir=/srvdata/mysql --user=mysql --log-error=/srvdata/mysql/dn79.err --pid-file=/srvdata/mysql/mysqld.pid --socket=/tmp/mysql.sock --port=3306
root       37257  0.0  0.0 424056 16840 ?        SNs  Mar22   1:03 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       52743  0.0  0.1 447100 30360 ?        SN   10:40   0:00 /opt/zone/sbin/httpd -D SSL -D SLOT_ID0 -f /etc/opt/zone/apache/ssl_httpd.conf
http       52744  0.0  0.1 447100 30360 ?        SN   10:40   0:00 /opt/zone/sbin/httpd -D SSL -D SLOT_ID0 -f /etc/opt/zone/apache/ssl_httpd.conf
http       52745  0.0  0.1 447100 30360 ?        SN   10:40   0:00 /opt/zone/sbin/httpd -D SSL -D SLOT_ID0 -f /etc/opt/zone/apache/ssl_httpd.conf
http       52746  0.0  0.1 447100 30360 ?        SN   10:40   0:00 /opt/zone/sbin/httpd -D SSL -D SLOT_ID0 -f /etc/opt/zone/apache/ssl_httpd.conf
http       52747  0.0  0.1 446956 30324 ?        SN   10:40   0:00 /opt/zone/sbin/httpd -D SSL -D SLOT_ID0 -f /etc/opt/zone/apache/ssl_httpd.conf
http       52980 69.1  1.8 852468 458088 ?   RN   10:41   5:02 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       53483 47.0  0.8 615088 221040 ?       RN   10:43   2:05 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       53641  1.8  0.2 446580 54632 ?        SN   10:45   0:03 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54384 81.2  0.9 625828 229972 ?       RN   10:45   2:14 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54411 47.7  0.5 535992 142416 ?       RN   10:45   1:09 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54470 41.7  0.4 512528 120012 ?       RN   10:46   0:54 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54475  0.1  0.1 437016 41528 ?        SN   10:46   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54486  1.5  0.2 445636 53916 ?        SN   10:46   0:02 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54531  2.5  0.2 445424 53012 ?        SN   10:46   0:02 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54549  0.0  0.0 424188  9188 ?        SN   10:46   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54642  0.0  0.0 424188  9200 ?        SN   10:47   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54651  0.0  0.0 424188  9188 ?        SN   10:47   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54661  0.0  0.0 424188  9208 ?        SN   10:47   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54663  6.9  0.2 449936 58560 ?        SN   10:47   0:03 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54666  6.0  0.2 453356 61124 ?        SN   10:47   0:02 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54667  2.8  0.1 437608 42088 ?        SN   10:47   0:01 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54670  1.5  0.1 437540 42172 ?        SN   10:47   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54672  2.1  0.1 439076 43648 ?        SN   10:47   0:01 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54709  0.0  0.0 424188  9192 ?        SN   10:47   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54711  1.0  0.1 437284 41780 ?        SN   10:47   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54712 11.8  0.2 448172 54700 ?        SN   10:47   0:02 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54720  0.0  0.0 424188  9192 ?        SN   10:48   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54721  0.0  0.0 424188  9188 ?        SN   10:48   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54747  9.1  0.2 443568 51848 ?        SN   10:48   0:01 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54782  1.8  0.1 438708 37896 ?        RN   10:48   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54784  0.0  0.0 424188  9180 ?        SN   10:48   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54785  0.0  0.0 424188  9188 ?        SN   10:48   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54789  0.0  0.0 424188  9188 ?        SN   10:48   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54790  0.0  0.0 424188  9188 ?        SN   10:48   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54791  0.0  0.0 424188  9188 ?        SN   10:48   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0
http       54792  0.0  0.0 424056  8352 ?        SN   10:48   0:00 /opt/zone/sbin/httpd -f /etc/opt/zone/apache/httpd.conf -D SLOT_ID0

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What can be done in the following situation? The application is Magento.

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