This reminds me of a (clean) limeric;
There was a young lady from Bight,
Whose speed was far faster than light.
She went out one day in a relative way,
And returned the previous night.
:)
Jared
"Jonathan Lewis" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED]
04/23/2002 02:58 AM
Please respond to ORACLE-L
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
cc:
Subject: Oracle invents time machine - optimizer now faster than light.
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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