On Feb 17, 2013, at 7:09 PM, "Liu, Raymond" <[email protected]> wrote:
> io.file.buffer.size Drop this down to 64KB not 128KB. You have 16 cpu which really means 8 cores and 4 disks. Do you have Ganglia up and running? I'll wager that you'll see a lot of wait cpu cycles in both cases. Also how much memory do you have on each machine? Tuning is going to be hardware specific and without really understanding what each parameter does, you can hurt performance. Michael Segel | (m) 312.755.9623 Segel and Associates The opinions expressed here are mine, while they may reflect a cognitive thought, that is purely accidental. Use at your own risk. Michael Segel michael_segel (AT) hotmail.com
