Sep3rd2007

The Verdict Is In!

Excellent Results!

CPU

CPU

System load was DOWN. This is due to much better disk IO (reduced wait times) and as such, user processes get to breath and send stuff back to clients in a speedy fashion.

LOAD

LOAD

Load being a matrix balanced scorecard measurement over various metrics is also down considerably. The trend to take note of here is the 15min average more than the 1 min average. While spikes and load increases over short periods may upset some users experience. If the delays compound and extend over a longer time frame, you will be tying up more people in the slowdown. Again, this is leading a bit to the parallel vs serial arguments. And in the case of a database, sometimes fewer ‘in and out’ transactions give a better user experience over time because more gets done in a given time period, relative to many threads fighting at once. Think orderly lines at the bank in a developed country compared to the Beijing Subway at Jianguomen or Fuxingmen!

TEMPERATURE

TEMP

A good 5 degrees lower in temp too. That is not insignificant. It all adds up to longer system life, better availability and lower costs.

POWER

POWER

Well out APC metered units aren’t that precise! While you can’t see any change from last week to this one – probably due to the load balancing effect of our redundant power supplies and redundant PDU’s AND UPS’ in between PDU’s and Servers (in addition to the IDC’s UPS’s and 4,000 Car Batts). You CAN see the increase in Saturday and Sunday while the massive disk arrays churn flat chat to reinitialise….that will need more power and also make more heat, needing more fan speed.