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 ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster