Question

Hello all,

First thank you for all the work that has been put into Aegir and Mercury/Pantheon. I've been keeping an eye on both for a while and am ready to jump in. While my needs aren't heavy ... yet. A current project has the potential to need the power and scalability of Mercury/Pantheon and I want Aegir to make life simpler for implementing new sites and creating test development environments. So with that in mind I am creating a new server at Linode and will be migrating my sites(mostly D6 with one D5) from my old standard server.

Since I am converting from a box that wasn't using Apache/Solr, had no reverse proxy(Varnish) or caching such as APC/memcached in place I don't have to have those options fully in place on day one. I can activate those as I get a handle on their unique twists due to multi-site on Mercury/Pantheon. But I do want to lay the groundwork and get as much in place up front as I can.

I have been reading everything I can find(I'll include some of the links at the end of this post), which has answered many of my questions. But has also lead to a few more detailed new ones.

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).

Maybe someone knows the answer to the issue that I'm having right now. Mercury 1.1 uses PHP 5.2 instead of 5.3 so you can't install php-xsl the normal way (sudo apt-get php5-xsl), kicks out this error:

My Mercury EC2 site has been running very slow for the past few days. I enabled cloudwatch for a bit and it is showing high CPU usuage. My site typically doesnt have more then 5-10 authenticated users online at once.

Here is a graph http://img708.imageshack.us/img708/8926/picture1ptf.png

What is the best way to track down what is slowing everything down?

Also, the "Online Users" block doesnt show how many guests are online because of the caching I guess - any way to fix that or get a semi accurate number about how many users are connected but not logged in?

I am really new to running a server. Been experimenting with Pantheon. Everything works great, I have the vote up down module which also works except that when I vote and the ajax updates the number of votes, the page changes slightly, some things stop picking up local.css theming (i use a fusion based theme, acquia marina). This happens only in a few places on the page that i noticed: views external filters and the views pager... What/where could the issue be? what should I check?

Any help would be great, thanks!

hello,

this is probably silly question, but if I change the name of the primary db from "pantheon" to "my_site" will any of the update_pressflow/mercury scripts have problems?
i think no, but want to be sure.

thanks!

div

I'm attempting to use a Mercury stack as a server for 2-3 sites. I have separate codebases under /var/www (some pressflow, some drupal). I have vhosts setup with the NameVirtualHost myip:8080 in default and the appropriate vhost files in sites-available with a successful a2ensite. I get a "Forbidden 403" unless I manually insert :8080 in the URL. I suspect Varnish but is there a simple setup guide for vhosts with Mercury that I haven't found with search engines? Is Varnish compatible with name based virtual hosts? Thanks.

In following the wiki (http://groups.drupal.org/node/70268) to build a mercury instance, after running the following command (step 5 of the wiki)
sudo bcfg2 -vqed -p 'mercury-aws'
Configuration freezes. Using a second ssh session and restarting the mysql server appears to unfreeze the script however later steps in the configuration surrounding mysql seem broken. Not knowing enough about bcfg2 to understand what it's trying to do that's not working leaves me stumped.

Hi,

I have installed pantheon on Ubuntu (lucid). But please note I have downgraded the php to 5.2.10 (karmic version) since the site was giving some errors with drupal 6.13.

Server softwares

Ubuntu Lucid
Apache/2.2.14
PHP 5.2.13 (cli)
Mysql 5.1.41-3ubuntu12.3
Varnish-2.1
Mercury 1.1

The site is working good.. but from time to time load increases tremendously and server just hangs. Seems like php connections are not getting closed.
This is from error.log

[Mon Jul 12 20:47:16 2010] [error] child died with signal 9

This is a question that had been asked before and discussed elsewhere. For instance, https://wiki.fourkitchens.com/display/PF/Modules+that+break+caching%2C+a... provides a list of modules that break the external and aggressive caching - some of them does not play well with normal cache either.

I need Drupal for Facebook and Organic Groups, both of which are listed as incompatible when external cache setting in the performance page is enabled.