Re: explain plan question

Sore area, hmmm, sounds off topic to me. :)

joe

Gurelei wrote:

>Peter, Charile:
>
>Sore area size is 5 times more in prod DB, shared pool
>is larger in dev, db_block_buffers in dev is twice the
>size in prod. I guess this answers my question.
>
>thanks
>
>Gene
>
>
>
>
>--- Peter Gram <peter.gram_at_miracleas.dk> wrote:
>
>>Gurelei
>>
>>Are the parameter's the same ?
>>
>>sort*
>>hash*
>>*pool*
>>db*
>>
>>Gurelei wrote:
>>
>>>Hi.
>>>
>>>I have executed an explain plan on a dev and prod
>>>databases. Both databases have the same data, use
>>>
>>the
>>
>>>same version of ORacle (8.1.7.0) and the same OS
>>>
>>(AIX
>>
>>>4.3.3). All the tables are analyzed. The plans
>>>
>>however
>>
>>>are somewhat different (below). What could explan
>>>
>>the
>>
>>>differences? For example, index usage (one plan
>>>
>>uses
>>
>>>an index to get to all the data, another - access
>>>
>>the
>>
>>>index and then the table). All the indices are the
>>>same on both databases. when I tried to force
>>>
>>ORacle
>>
>>>to use the indices with hints, the cost grew from
>>>
>>322
>>
>>>to 566. MY concernt is that I may not be able to
>>>
>>tune
>>
>>>a query if I can't replicate the explain plan
>>>
>>exactly
>>
>>>in dev as it is in production.
>>>
>>>Thanks for any input
>>>
>>>Gene
>>>
>>>0-0-3211.321 SELECT STATEMENT SQL1 Cost = 321
>>>1-0-1 2.1 SORT GROUP BY
>>>2-1-1 3.1 NESTED LOOPS
>>>3-2-1 4.1 HASH JOIN OUTER
>>>4-3-1 5.1 HASH JOIN OUTER
>>>5-4-1 6.1 HASH JOIN
>>>6-5-1 7.1 TABLE ACCESS FULL TELESLS_EMPL
>>>7-5-2 7.2 INDEX RANGE SCAN TS_EMP_HST_ALT1
>>>
>>UNIQUE
>>
>>>8-4-2 6.2 INDEX FAST FULL SCAN PERF_STATS_ALT1
>>>UNIQUE
>>>9-3-2 5.2 INDEX FAST FULL SCAN PRDCT_STAT_ALT1
>>>UNIQUE
>>>10-2-2 4.2 INDEX UNIQUE SCAN ORG_UNT_HST_PK
>>>
>>UNIQUE
>>
>>>vs
>>>
>>>0-0-3231.323 SELECT STATEMENT SQL1 Cost = 323
>>>1-0-1 2.1 SORT GROUP BY
>>>2-1-1 3.1 NESTED LOOPS OUTER
>>>3-2-1 4.1 NESTED LOOPS OUTER
>>>4-3-1 5.1 NESTED LOOPS
>>>5-4-1 6.1 HASH JOIN
>>>6-5-1 7.1 TABLE ACCESS FULL TELESLS_EMPL
>>>7-5-2 7.2 INDEX RANGE SCAN TS_EMP_HST_ALT1
>>>
>>UNIQUE
>>
>>>8-4-2 6.2 INDEX UNIQUE SCAN ORG_UNT_HST_PK
>>>
>>UNIQUE
>>
>>>9-3-2 5.2 TABLE ACCESS BY INDEX ROWID PERF_STATS
>>>10-9-1 6.1 INDEX RANGE SCAN PERF_STATS_FK2_X
>>>NON-UNIQUE
>>>11-2-2 4.2 TABLE ACCESS BY INDEX ROWID
>>>
>>PRDCT_STATS
>>
>>>12-11-1 5.1 INDEX RANGE SCAN PRDCT_STAT_FK1_X
>>>NON-UNIQUE
>>>
>>>
>>>__________________________________________________
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>>>
>>>
>>--
>>
>>/regards
>>
>>Peter Gram
>>
>>Mobil : +45 2527 7107
>>Fax : +45 4466 8856
>>
>>Miracle A/S
>>Kratvej 2
>>2760 Måløv
>>http://miracleas.dk
>>
>>/*
>>The process of preparing programs for a digital
>>computer is especially
>>attractive, not only because it can be economically
>>and scientifically
>>rewarding, but also because it can be an aesthetic
>>experience much like
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>>
>>Donald Knuth
>>*/
>>
>>
>>
>
>>ATTACHMENT part 2 application/x-pkcs7-signature
>>
>name=smime.p7s
>
>
>
>__________________________________________________
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>Yahoo! - Official partner of 2002 FIFA World Cup
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>

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