memcached

So now we've evolved and moved forward in the development of the Special Olympics site, and some of you will remember my questions about how to choose a web hosting service. Although we chose Webfaction, we may need to move to a dedicated server and VPS, but in truth, I am VERY confused about how to KNOW what our site performance needs, and memory needs, truly are. PLEASE offer advice if you can.

From previous posting to this group the Special Olympics of Northern California and Nevada decided to try Webfaction for several reasons, but two of there were

a) that I was told it had memcache that we could use and also was
b) told that the nginx server would help with serving static files.

Well neither seems possible, unless someone can help. All help is appreciated by myself and the Special Olympics.

We have a Pressflow 6 app with Cache Router routing to multiple memcache bins. The bins have plenty of memory allocated, but other than that are running with default options.

In local testing, I've found that some basic cache-setting fails because of object size. Examples:

Hi,

How is memcache different form APC if both are used as user-object caches, with the same Cacherouter module?
1) APC as opcode + APC as user storage
2) APC as opcode + memcached as user storage

What I see is that in real life I get better results (page refresh times, server load) with case 1) - memory allocation in both cases ~100MB
So is memcache useful at all if using just 1 server? I really doubt it is faster...

What is your experience?

Hi Folks,

It was great seeing everyone last night. I hope you all had a good time.

I wanted to pick your brains about a topic I know we all love - scaling Drupal!

Hi,

We begun our deployment of a large community website from a single machine that combined DB and web server two years ago. We experienced continuous growth and our system evolved significantly, different performance tunings led to the following setup (so far):

I want to give everyone a preview of what we're working on for Mercury 1.1:

We're working on implementing multiple methods for improving performance on a Drupal 5 platform and I noticed that various user hooks are called repeatedly on each page request. I realized that neither Drupal 5 nor Drupal 6 implement a static caching mechanism for storing complete user objects as they do for storing complete node objects.

I'm sure there is a good reason for this, but I'm having trouble fully understanding why. Can someone help explain to me why this is not done?

Thanks,

I've got a server performing badly at the moment - giving 500 Internal Server error every couple of page refreshes. There are just over 1700 users online at present.

I've checked top, and it's showing me six occurrences of the httpd command using over 10% of the CPU each - with one or two being over 20%, and occasionally over 30%. I've attached a snapshot of the top command in case there's useful information on there I've missed off.

Hello,

Maybe next week I will setup a dedicated server.

Server hardware:
Dual core ATOM 330
2GB RAM
Swap: 2.2GB

OS: CentOS 5.3

Drupal:
-Use MySQL DB
-Use boost
(some of my website use statistic, some not, but all use boost)
-Lots of anonymous user, with high read & low write

For this serer, what I want is:
-highest request/sec
-lowest RAM & CPU usage

Below is what will I do, but because I dont have experience in nginx, so I hope there will be suggestion (Which one has duplicated function and can be ignored, or not enough something...)