I'm sorry,I forgot to attach the log info:
WARNING: pgstat wait timeout SELECTWARNING: pgstat wait timeout SELECTWARNING: corrupted statistics file "pg_stat_tmp/pgstat.stat" VACUUMWARNING: pgstat wait timeout ------------------ Original ------------------ From: "Vasilis Ventirozos"<v.ventiro...@gmail.com>; Date: Thu, Apr 11, 2013 02:29 PM To: "X.H.----WANG"<82661...@qq.com>; Cc: "pgsql-admin"<pgsql-admin@postgresql.org>; Subject: Re: [ADMIN] with PostgreSQL 9.1.9,the stats collector process is not work! On Thursday, April 11, 2013, X.H.----WANG <82661...@qq.com> wrote: Hello everybody: After I switch the slave to the master , I can not get the stats information by the below sql and the pg_stat_reset() does not work on the New Master, And I vacuum by hand,it's still not work! I need some help.Could you give me any idea? the stat sql: SELECT st.relname, n_tup_ins, n_tup_upd, n_tup_del, n_tup_hot_upd, n_live_tup, n_dead_tup, last_vacuum, last_autovacuum, last_analyze, last_autoanalyze, vacuum_count, autovacuum_count, analyze_count, autoanalyze_count, pg_size_pretty(pg_relation_size(st.relid) + CASE WHEN cl.reltoastrelid = 0 THEN 0 ELSE pg_relation_size(cl.reltoastrelid) + COALESCE((SELECT SUM(pg_relation_size(indexrelid)) FROM pg_index WHERE indrelid=cl.reltoastrelid)::int8, 0) END + COALESCE((SELECT SUM(pg_relation_size(indexrelid)) FROM pg_index WHERE indrelid=st.relid)::int8, 0)) AS size FROM pg_stat_all_tables st JOIN pg_class cl on cl.oid=st.relid WHERE schemaname = 'public' ORDER BY relname; My environment: Linux 3.2.1-gentoo-r2 postgresql 9.1.9, the paras: "autovacuum";"on" "track_counts";"on" /etc/hosts: 127.0.0.1 localhost 192.168.0.22 localhost.localdomain localhost the postgresql's processes exist: writer process stats collector process wal writer process autovacuum launcher process wal sender process Thank you for your time! Best Regard! River