Howdy, Environment: Solaris 10 Postgres 8.3.3 I’m getting high sequential scans for some pg_* tables: <database>=# select relname, sum(seq_scan) as seq_scan,sum(seq_tup_read) as seq_tup_read,sum(idx_scan) as idx_scan, sum(idx_tup_fetch) as idx_tup_fetch, sum(n_tup_ins) as n_tup_ins, sum(n_tup_upd) as n_tup_upd, sum(n_tup_del) as n_tup_del from pg_stat_all_tables group by 1 order by 2 desc limit 4; relname | seq_scan | seq_tup_read | idx_scan | idx_tup_fetch | n_tup_ins | n_tup_upd | n_tup_del ---------------------------------+----------+--------------+----------+---------------+-----------+-----------+----------- <table> | 6896498 | 91295702 | 107663 | 469057 | 103966 | 103966 | 103966 pg_authid | 3119053 | 125950392 | 12000732 | 12000718 | 1 | 1 | 0 pg_am | 2642438 | 2642440 | 5 | 5 | 0 | 0 | 0 pg_database | 1349020 | 14771768 | 6953392 | 6953392 | 0 | 0 | 0 (4 rows) <database>=# Is this normal? Is it advisable to index pg_* tables? Thank you, Sam |
