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Drupal 6 site Crashing every few hours ( High Disk I/O)
Background: The Drupal 6 site used to work very well on a VPS until a few months ago. However in order to reduce the server cost as well as to improve performance of the site even more, we decided to move to the cloud and Pantheon. We setup a pantheon server and moved a copy of the site on rackspacecloud and tested it using Jmeter with 1000 users and tested continuously for 4 hours and the load never went more than 1. The Jmeter report showed only .4% error(which was normal i think).
Read moreSwitching from MySQL to Cassandra using Cassandra modules?
Switching from MySQL to Cassandra using Cassandra modules?
Hello,
Maybe one day I need Cassandra. I hope I can use only Cassandra without MySQL.
(Cassandra modules: http://drupal.org/project/cassandra)
I have some question:
1. Do I need to change the codes in modules (example: Views, CCK, etc) currently used to communicate with Cassandra? Or by using the api from this module?
2. If I have a website already running, how to migrate data from MySQL? Using Hadoop?
Thanks in advance.
Read moreDisable caching on page request when serving from varnish based on url
We just moved our test site over to an AWS hosted solution based on the 1.0 Mercury AMI (love it!) with plans to take it live in the next couple of weeks. We are using a custom shopping cart solution that allows anonymous visitors to 'add' items to their cart via a URL (not via form submit). When the link is accessed, the custom module will instantiate a session (which in turns sets a cookie) to ensure that varnish is no longer serving cached pages.
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CSS breaks when I enable D6 CSS Optimization...theories as to why?
I've got a site I'm trying to speed up. One of the obvious tools for this is the "Optimize CSS" option over in the admin performance page. I've used this on other sites without problem. But for some reason, with this site, when I activate it, all my CSS disappears and I'm left without any styles at all on the page.
I've spent a little time trying to troubleshoot but am stumped. What could case the entire CSS to disappear when I activate that option?
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Apache as a dynamic server with lighttpd as a static server
hi folks,
Does any one know how to integrate apache as a dynamic server and lighttpd as a static server both.
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Improve Drupal Performance
I have a Drupal site with many modules enabled (CCK, views, rules, etc). The site will be used by several hundred people so I want fast page loads and the server to be able to withstand a large load. Everyone using the site is going to be a authenticated user so modules like Boost aren't going to help. The server's really good, dual-core and 6 gigs of RAM. I've installed APC, and it is awesome, but I have no idea how to put the rest of all this RAM to use.
Read moreGetting better performance from a slow view query
On my Drupal site my users set a location and then they can browse node results that are sorted based on distance from them.
These queries are pretty big and are taking 6000ms or more each time they are run. I am using caching so if they hit that same page of results again the query is cached, but as soon as the use the pager to navigate to the next 15 its technically a new query so it must hit the DB again.
Sorting by location seems to be extremely intensive, but its the basis of my website and cannot be removed.
What can I do to get better performance?
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Are Apache mod_cache, mod_disk_ache and mod_mem_cache relevant?
Can some of the functionality that is available in Boost and similar modules, be achieved by just using Apache's mod_cache, mod_disk_ache and mod_mem_cache modules?
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Apache and PHP performance tuning - memcached & APC???
I've been reading articles all over the place for the last two days, about what should and shouldn't be done. But I don't think all of it applies to our current setup. I am new to the world of Drupal and Apache - I was a Windows/IIS admin - we are currently in a replatforming project for our site.
Here is our setup:
Live Servers (just application, MySQL is separate)
- MemTotal: 31.41638 gb
- MemFree: 21.47192 gb
- CPU: 4 6-core processors
cpu MHz : 2411.115
cache size : 512 KB
Running Pressflow Drupal 6.15.73 with the Jason Litka PHP 5.2.13
Read moreSystem/Network/Application Monitoring for a full, high-performance stack -- What do you use?
I've installed Zabbix 1.8.3 monitoring on my Drupal (actually, Pressflow) box.
It works great out-of-the-box for non-Drupal-specific server-level monitoring, especially across multiple/distributed servers.
Now, with Drupal/Zabbix module (http://drupal.org/project/zabbix), it works nicely for monitoring Drupal Core events. At least when 'just' Drupal listens directly at :80.
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