Hello, I reconsidered a way based on the v5 patch in line with Horiguchi-san's comment.
This approach is as follows: - A partitioned table is checked whether it needs analyze like a plain table in relation_needs_vacanalyze(). To do this, we should store partitioned table's stats (changes_since_analyze). - Partitioned table's changes_since_analyze is updated when analyze a leaf partition by propagating its changes_since_analyze. In the next scheduled analyze time, it is used in the above process. That is, the partitioned table is analyzed behind leaf partitions. - The propagation process differs between autoanalyze or plain analyze. In autoanalyze, a leaf partition's changes_since_analyze is propagated to *all* ancestors. Whereas, in plain analyze on an inheritance tree, propagates to ancestors not included the tree to avoid needless counting. Attach the latest patch to this email. Could you check it again please? -- Best regards, Yuzuko Hosoya NTT Open Source Software Center
v10_autovacuum_on_partitioned_table.patch
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