| From: | "Thomas G(dot) Lockhart" <lockhart(at)alumni(dot)caltech(dot)edu> |
|---|---|
| To: | Bruce Momjian <maillist(at)candle(dot)pha(dot)pa(dot)us> |
| Cc: | Michal Mosiewicz <mimo(at)interdata(dot)com(dot)pl>, hackers(at)postgresql(dot)org |
| Subject: | Re: [HACKERS] Sequential scan speed, mmap, disk i/o |
| Date: | 1998-05-16 02:40:14 |
| Message-ID: | 355CFC8E.91BF31DF@alumni.caltech.edu |
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| Thread: | |
| Lists: | pgsql-hackers |
> Basically, Linux is double my speed for 8k mmap'ed chunks. Around 32k
> chunks, I get closer, and 8mb chunks are the same. Glad to hear Linux
> has optimized mmap() recently, because BSD/OS looks much slower than
> Linux on this.
Well Bruce, don't be too happy. Most people aren't yet running the
optimized kernel; don't know if any of the benchmarks came from someone
running a bleeding-edge development version, which is what 2.1.99 would
be; first feature-freeze release in preparation for v2.2 afaik :)
And scrappy, no need to note that _all_ Linux kernels are bleeding edge
releases :)
- Tom (from his Linux box...)
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