Archive for the ‘Performance’ Category

Thread: Kernel vulnerability affects EC2: NULL Pointer Dereference

Wednesday, September 30th, 2009

Hi. Last week a vulnerability was found in the Linux kernel that basically grants you root access to a machine if you have a normal user account. I’ve tested this in one instance running kernel 2.6.18-xenU-ec2-v1.0.


Redis vs MySQL vs Tokyo Tyrant (on EC2)

Tuesday, September 29th, 2009

So, the question I am trying to answer is “roughly how much performance can we gain from using Redis for storing simple data instead of MySQL?”. Then it is up to you to look at all the differences and decide whether it is worth pursuing a switch to Redis.

Note: I will be looking at other key-value stores in the near future :-)

EC2 AMI CPU performance

Tuesday, September 29th, 2009

I’m using EC2 from 2 years, but only in these lastest months I notice that the small instances not are performant.I’m working to various project to use autoscalability, but every my trying give me not good results.For example start two small fedora8 Amazon bundled

Awful EC2 Performance

Monday, September 28th, 2009

“I run postgresql on a xen instance with 1GB of ram for development and on that platform it runs twice as fast for the same queries as it does on an m1.large instance on EC2″