Thank you Dmitry.
Here are the results of gstat:
FLAT_DATA (290)
Primary pointer page: 5239142, Index root page: 5239147
Average record length: 213.90, total records: 8288203
Average version length: 0.00, total versions: 0, max versions: 0
Data pages: 533746, data page slots: 533746, average fill: 88%
Fill distribution:
0 - 19% = 0
20 - 39% = 0
40 - 59% = 0
60 - 79% = 30
80 - 99% = 533716
DETAILS_DATA (262)
Primary pointer page: 842, Index root page: 843
Average record length: 20.19, total records: 164512578
Average version length: 0.00, total versions: 0, max versions: 0
Data pages: 2455600, data page slots: 2455600, average fill: 61%
Fill distribution:
0 - 19% = 0
20 - 39% = 1
40 - 59% = 0
60 - 79% = 2455599
80 - 99% = 0
I guess this confirms your statement about record header size?
FLAT_DATA record length is 213.90 which is over 10 times more than DETAILS_DATA
record length 20.19.
However in DETAILS_DATA we have 164512578 records which is 19.8 times more than
in FLAT_DATA.
Best regards.
