RE: wrong setting of sort_area_size

2001-05-04 Thread Hillman, Alex
Usually such large sort_area_size is used for batch processes, so there is no problem with many such jobs running at the same time. It can be done befor e running the job and then back to old value after the job ended. Also if hash_area_size parameter default value is sort_area_size. This is why t

Re: wrong setting of sort_area_size

2001-05-04 Thread Connor McDonald
Mininmal disadvantages besides overextending the machine's memory...eg if 100 people are all doing a large sort at the SAME time, you could have 100 x 10m of memory or more getting munch up...But the memory is only used when they want to do a sort ... hth connor --- CC Harvest <[EMAIL PROTECTE

Re: wrong setting of sort_area_size

2001-05-04 Thread nlzanen1
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RE: wrong setting of sort_area_size

2001-05-03 Thread Sunil_Nookala
Advantage:increasing sort area size decreases the I/O, hence quicker sorting process. Disadvantage: increasing sort area causes sort process to allocate more memory, which effects the OS memory allocation resulting in paging and swapping. large sort area sizes can used if you are using with a mini

wrong setting of sort_area_size

2001-05-03 Thread CC Harvest
we had a customer of the sort_area_size=1000 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