Thread: stat collector is not using

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.