I am using Postgresql 8.1. I set stats_start_collector = on
But I found statistics collector is not using; show stats_start_collector; stats_start_collector ----------------------- on (1 row) select * from pg_stat_user_indexes where idx_scan > 0; relid | indexrelid | schemaname | relname | indexrelname | idx_scan | idx_tup_read | idx_tup_fetch -------+------------+------------+---------+--------------+----------+--------------+--------------- (0 rows) select * from pg_stat_user_tables where seq_scan > 0; relid | schemaname | relname | seq_scan | seq_tup_read | idx_scan | idx_tup_fetch | n_tup_ins | n_tup_upd | n_tup_del -------+------------+---------+----------+--------------+----------+---------------+-----------+-----------+----------- (0 rows) select * from pg_stat_user_indexes where relname='crm'; relid | indexrelid | schemaname | relname | indexrelname | idx_scan | idx_tup_read | idx_tup_fetch ---------+------------+------------+------------------+---------------------------------+----------+--------------+--------------- 2587873 | 2593637 | public | crm | crm_smownerid_deleted_idx | 0 | 0 | 0 2587873 | 2593636 | public | crm | crm_deleted_smownerid_idx | 0 | 0 | 0 2587873 | 2593635 | public | crm | crm_modifiedby_idx | 0 | 0 | 0 2587873 | 2593634 | public | crm | crm_smownerid_idx | 0 | 0 | 0 2587873 | 2593633 | public | crm | crm_smcreatorid_idx | 0 | 0 | 0 2587873 | 2593631 | public | crm | crm_pkey | 0 | 0 | 0 Could anyone please tell me why the statistics collector is not using? I run vacuum analyze every night.