BTW, I noticed difference of outputs from pg_freespacemap and pgstattuple. I ran pgbench and inspected "accounts" table by using these tools.
pg_freespacemap:
sum of bytes: 250712
pgstattuple:
free_space: 354880
Shouldn't they be identical?
--
Tatsuo Ishii
SRA OSS, Inc. Japan
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TIP 5: don't forget to increase your free space map settings
