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Re: wrong setting of sort_area_size

From: <nlzanen1_at_EY.NL>
Date: Fri, 04 May 2001 00:35:49 -0700
Message-ID: <F001.002F950A.20010504002523@fatcity.com>

Hi,

Setting the sort_area_size to something so big it sounds silly may actually improve some querries dramatically. I don't see why it should degrade performance if you have the physical memory to spare.

We had a batch job that took about 60 hours but had to be tuned so it fitted in the 4 hours maintenance window. Apart from some funky compute statistics we increased the sort_area_size to 100Mb after which it did a hash join i.s.o nested loops and finished well within half hour

Jack

                                                                                       
                          
                    CC Harvest                                                         
                          
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we had a customer of the sort_area_size=10000000 in their database, the temp table space is 256MB, the db_block_size is 8k. They have some performance problem, I think it's probably related to the setting of sort_area_size(we have only one user). So what's the benefits/disadvantage of too big sort_area_size?

Thanks,

Chris



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  INET: nlzanen1_at_EY.NL

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