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
