Re: Oracle invents time machine - optimizer now faster than light.

Hello Jonathan,

isn't it soft parse (mis=0) ?

regards...

Jonathan Lewis wrote:

> Look carefully at the following (genuine) extract
> from a 9.0.1.3 trace file, and examine the TIM=
> entries:
>
> PARSING IN CURSOR #2 len=210 dep=1 uid=0 oct=3 lid=0
> tim=1019495629365212 hv=787810128 ad='6e0a278'
> select /*+ rule */ bucket_cnt, row_cnt, cache_cnt, null_cnt,
> timestamp#, sample_size, minimum, maximum, distcnt, lowval, hival,
> density, col#, spare1, spare2, avgcln from hist_head$ where obj#=:1
> and intcol#=:2
> END OF STMT
> PARSE
> #2:c=0,e=492,p=0,cr=0,cu=0,mis=0,r=0,dep=1,og=3,tim=1019495629365100
>
> Note how Oracle has managed to finish parsing the
> statement 112 microseconds before it started.
>
> Now that's how to pass a benchmark !
>
> Jonathan Lewis
> http://www.jlcomp.demon.co.uk
>
> Author of:
> Practical Oracle 8i: Building Efficient Databases
>
> Next Seminar - Australia - July/August
> http://www.jlcomp.demon.co.uk/seminar.html
>
> Host to The Co-Operative Oracle Users' FAQ
> http://www.jlcomp.demon.co.uk/faq/ind_faq.html
>
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--
Danisment Gazi Unal
http://www.ubTools.com



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Please see the official ORACLE-L FAQ: http://www.orafaq.com
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Author: Danisment Gazi Unal
  INET: dunal_at_ubTools.com

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