Messages in this thread | | | Date | Fri, 17 Jan 2003 13:37:18 -0800 | From | Andrew Morton <> | Subject | Re: [OSDL][BENCHMARK] Database results 2.4 versus 2.5 |
| |
Cliff White <cliffw@osdl.org> wrote: > > > So it sounds like DBT2 is stabilised now, and producing repeatable results? > > That's excellent. > Thanks. the kit's available off Sourceforge now, and we'll have STP version > up Mondayish.
OK. My utter database ignorance was an insurmountable-within-two-hour-attention-span problem when I tried to set up dbt1.
> > So either the I/O scheduler is doing a better job, or the VM page > > replacement decisions are agreeable for this load. > > Okay. Is there something we could do that would point at one or the other?
Different combinations of working set and physical memory will tell us.
Also, when we have a lot of vmstat/etc traces available we can decide how I/O bound it is, and whether we need to look at upping the request queue sizes. Which is something which we can now do, and which could easily make a difference here.
But we'll have to get you onto at least 2.5.58 for that ;)
> would a smaller memory database (say 2GB instead of 4GB ) really show you > anything interesting on a 4GB system, since there's so little pressure?
Yes, that would be interesting. We're dealing with single points in twenty-seven-dimensional space. Tweaking input parameter individually helps one gain an understanding of what is going on. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |