Postgresql - Table size do not refresh -

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i want know size of table (postgresql). make query:

select pg_size_pretty(pg_table_size('mytable'));

result: 8192 bytes

then, add 4 rows , result same (8192 bytes).

what doing wrong? missing?

thanks lot...

postgres puts records in fixed-size pages, 8kb each default. storage allocated 1 page @ time. once add enough rows reach table's fillfactor, add second block, , size jump 16384 bytes.


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