Archive for February, 2008
The difference between %iowait from sar and %util from iostat
Recently I needed to explain the difference between %iowait from sar and %util from iostat. They both measure outstanding i/o requests but their method for measurement is slightly different. From the sar man page iowait is defined as:
iowait:
Percentage of time that the CPU or CPUs were idle during which the system had an outstanding disk [...]
Pho Hoa’s Got Wood!
For those of you that don’t live in the culturally diverse bay area, pho is a Vietnamese soup consisting of rice noodles in a clear broth and various meats. Around here it’s typically eaten with over sized plastic chopsticks. The problem is that wet noodles are very difficult to pick up with plastic chopsticks. The [...]