"Chen, Kenneth W" <[EMAIL PROTECTED]> wrote: > > Andrew Morton wrote on Tuesday, March 08, 2005 10:28 PM > > But before doing anything else, please bench this on real hardware, > > see if it is worth pursuing. > > Let me answer the questions in reverse order. We started with running > industry standard transaction processing database benchmark on 2.6 kernel, > on real hardware (4P smp, 64 GB memory, 450 disks) running industry > standard db application. What we measured is that with best tuning done > to the system, 2.6 kernel has a huge performance regression relative to > its predecessor 2.4 kernel (a kernel from RHEL3, 2.4.21 based).
That's news to me. I thought we were doing OK with big database stuff. Surely lots of people have been testing such things. > And yes, it is all worth pursuing, the two patches on raw device recuperate > 1/3 of the total benchmark performance regression. On a real disk driver? hm, I'm wrong then. Did you generate a kernel profile? - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
