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How to calculate the memory a query consumes

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Hi,

maybe someone can answer this question?

I have a large query which reads 207,760,387 pages. Does this mean that

 207,760,387 * 8 KB  (page size) / 128 = MB / 1024 = GB.

That would mean that I would need 1220 GB total memory for MSSQL, if I do not want the System to starting paging...

What is my mistake?

thanks

Stefan


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