Hello,
The following is the procedure to calculate the disk space occupied by postgresql from a flat file. http://www.postgresql.org/docs/faqs.FAQ.html#item4.5 In this I didn't understood some terms 24 bytes: each row header (approximate) 24 bytes: one int field and one text field + 4 bytes: pointer on page to tuple what is that first 24 bytes and last 4 bytes represents? I did practically but for a table with two integer columns it takes 185 rows for a page size of 8192 for 186th it changes to 16384.But when I applied this procedure....... 8 bytes: each row header 8 bytes : two int fields + 4 bytes: pointer on page to tuple total 20 bytes 8192/20 =410 rows per page (approx.) Can you please tell me how to caluculate number of rows per page size. Thank You, Avin.
