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Message Posted: Tue, 02 Mar 2004 @ 18:48:32 GMT
I'm totally confused with the terminology that's been used in documentation to calculate the efficiency of compression .
1)table_header_space = no:amps * sum(field_size-col)
where field_size-col is no:of table header bytes used by the compressed column + 1
What is this "table header bytes used by compressed column " , where can I get this info ? , is this same as column length
2) row_header_space = table_cardinality * (presence_octets -1)
how to calculate "presence octets" ? where can I get this info ?
Any help with example would be highly appreciated
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