Since putting in the new colo box, we (myself and the two “tenants” on the Xen user domains (domU)) have noticed it being very slow. At times it seems like the first time you try something it will be very slow, but if you try again immediately it will run quickly. For instance, sometimes a page load will time out, but you hit refresh and it will load quite quickly. I’ve started to suspect the problem is the disks, because the CPU is pretty fast. In order to pin point the problem, I’ve decided to try and benchmark the colo box against my home computer. Both computers have SATA 3Gb/s disks in a software RAID-1 (mirror). Both computers have dual core CPUs (although the home one is a Core2 Duo at 1.86GHz and the colo is a Xeon at 3.0GHz). However, the colo is also running tons of other stuff and it’s running in a Xen domU, so that might slow things down a bit.
Continue reading “Houston, we have a problem”
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