Mostly identical tables have different disk size
I have two tables that I inserted into my v9.5 postgres database. They should contain identical data, which is 91 GB on my hard drive in nested directories. (I added it twice to try to debug something else.) The table that was created first (about a month ago) and has been being queried on is 266 GB according to dt+. The new table is only 86 GB. They have exactly the same row count and the same data types with the same fields. The only difference is that on the original table, I replaced 'na' with NULL. I tried vacuuming the original table and 0 dead rows were found. What could be causing the difference in the sizes of these two tables?
postgresql postgresql-9.5
asked Nov 16 '18 at 4:00
hayfayhayfay
164
add a comment |
I have two tables that I inserted into my v9.5 postgres database. They should contain identical data, which is 91 GB on my hard drive in nested directories. (I added it twice to try to debug something else.) The table that was created first (about a month ago) and has been being queried on is 266 GB according to dt+. The new table is only 86 GB. They have exactly the same row count and the same data types with the same fields. The only difference is that on the original table, I replaced 'na' with NULL. I tried vacuuming the original table and 0 dead rows were found. What could be causing the difference in the sizes of these two tables?
postgresql postgresql-9.5
asked Nov 16 '18 at 4:00
hayfayhayfay
164
That description is to vague. You'll have to show SQL: 1) the table definitions 2) how you inserted the data into both tables 3) how you replacced'na'with NULL 4) how you measured the size.
– Laurenz Albe
Nov 16 '18 at 4:41
add a comment |
I have two tables that I inserted into my v9.5 postgres database. They should contain identical data, which is 91 GB on my hard drive in nested directories. (I added it twice to try to debug something else.) The table that was created first (about a month ago) and has been being queried on is 266 GB according to dt+. The new table is only 86 GB. They have exactly the same row count and the same data types with the same fields. The only difference is that on the original table, I replaced 'na' with NULL. I tried vacuuming the original table and 0 dead rows were found. What could be causing the difference in the sizes of these two tables?
postgresql postgresql-9.5
asked Nov 16 '18 at 4:00
hayfayhayfay
164
I have two tables that I inserted into my v9.5 postgres database. They should contain identical data, which is 91 GB on my hard drive in nested directories. (I added it twice to try to debug something else.) The table that was created first (about a month ago) and has been being queried on is 266 GB according to dt+. The new table is only 86 GB. They have exactly the same row count and the same data types with the same fields. The only difference is that on the original table, I replaced 'na' with NULL. I tried vacuuming the original table and 0 dead rows were found. What could be causing the difference in the sizes of these two tables?
postgresql postgresql-9.5
postgresql postgresql-9.5
asked Nov 16 '18 at 4:00
hayfayhayfay
164
asked Nov 16 '18 at 4:00
hayfayhayfay
164
asked Nov 16 '18 at 4:00
hayfayhayfay
164
asked Nov 16 '18 at 4:00
hayfayhayfay
164
asked Nov 16 '18 at 4:00
hayfayhayfay
164
164
That description is to vague. You'll have to show SQL: 1) the table definitions 2) how you inserted the data into both tables 3) how you replacced'na'with NULL 4) how you measured the size.
– Laurenz Albe
Nov 16 '18 at 4:41
add a comment |
That description is to vague. You'll have to show SQL: 1) the table definitions 2) how you inserted the data into both tables 3) how you replacced'na'with NULL 4) how you measured the size.
– Laurenz Albe
Nov 16 '18 at 4:41
That description is to vague. You'll have to show SQL: 1) the table definitions 2) how you inserted the data into both tables 3) how you replacced
'na' with NULL 4) how you measured the size.– Laurenz Albe
Nov 16 '18 at 4:41
That description is to vague. You'll have to show SQL: 1) the table definitions 2) how you inserted the data into both tables 3) how you replacced
'na' with NULL 4) how you measured the size.– Laurenz Albe
Nov 16 '18 at 4:41
add a comment |
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That description is to vague. You'll have to show SQL: 1) the table definitions 2) how you inserted the data into both tables 3) how you replacced
'na'with NULL 4) how you measured the size.– Laurenz Albe
Nov 16 '18 at 4:41