Disabling w3 total cache:
edit the wp-config.php file
define (WP_CACHE’, true);
from true to false (i.e. define (‘WP_CACHE’,false);
Command line method of clearing w3 total cache:
delete files form the wp-contentw3tc/pgcache/ directory
http://www.frandimore.com/blog-setup/how-to-delete-w3-total-cache-properly/
git clone git://github.com/jacobian/openstack.compute
cd openstack.compute
python setup.py build
sudo python
ps -ylC apache2 | awk ‘{s+=$8} END {print s/1024/(NR – 1)}’
ps -ylC httpd | awk ‘{s+=$8} END {print s/1024/(NR – 1)}’
To calculate mysql usage:
curl -D- http://example.com | grep X-Mod-Pagespeed
shows all zeros if it isn’t installed
if it is installed,
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 966 0 966 0 0 723 0 –:–:– 0:00:01 –:–:– 1618
or alternately curl -D- http://example.com |less
should show something like:
Date: Fri, 07 Sep 2012 21:51:06 GMT
Server: Apache/2.2.3 (CentOS)
…
X-Mod-Pagespeed: 0.10.22.4-1633
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 966 0 966 0 0 723 0 –:–:– 0:00:01 –:–:– 1618
If you get this error when doing service {servicename} status:
{servicename} dead but subsys is locked
You need to remove the {servicename} lock file
rm /var/lock/subsys/{servicename}
[root@ssltest test]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.3 (Santiago)
[root@ssltest test]# openssl version
OpenSSL 1.0.0-fips 29 Mar 2010
[root@ssltest test]# openssl ciphers -v | grep ECDSA
When creating a dev version of a wordpress site, put the following in your wp-config for an immediate fix:
define(‘WP_HOME’,’http://dev.mysite.com’);
define(‘WP_SITEURL’,’http://dev.mysite.com’);
Another option is to edit the wp_options table as follows:
select * from wp_options where option_name=’siteurl’;
update option_value set option_value=”http://newsite.com” where option_name = ‘siteurl’;
You can translate that to a readable list of algorithms with this command: openssl ciphers -v ‘ALL:!ADH:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP’
Read more on this site: http://unhandledexpression.com/2013/01/25/5-easy-tips-to-accelerate-ssl/
Timezone
[root@server02 ~]# date
Fri Feb 24 02:11:38 CST 2012
MySQL time-zone:
mysql> show global variables like ‘%time_zone%’;
+——————+——–+
| Variable_name | Value |
+——————+——–+
| system_time_zone | CST |
| time_zone | SYSTEM |
+——————+——–+
2 rows in set (0.00 sec)
mysql> show variables like ‘%time_zone%’;
+——————+——–+
| Variable_name | Value |
+——————+——–+
| system_time_zone | CST |
| time_zone | SYSTEM |
+——————+——–+
2 rows in set (0.00 sec)
The MySQL timezone is inherited from the server’s timezone.
PHP timezone is CST (also inherited from the server timezone).
[root@server02 ~]# php 2>/dev/null
< ?php
echo date_default_timezone_get();
?>
America/Chicago
Here are a couple of websites you can use to verify whether the site slowness is common for most clients or just your local network.
http://host-tracker.com/
http://internetsupervision.com