OK! Thank you so much for your reply!
The Streaming Replication is used.
Due to a need,We need to switch the roles of master and slave.
So I shut down the Master at first,Then promoted the Salve to The new
Master(pg_ctl promote -D).
Every thing is ok but the stats infos is null on the new Master.
I checked the pgstat.stat file in pg_stat_tmp directory.I found no changes to
the pgstat.stat file!
So I removed the the pgstat.stat file but the pgstat.stat file can not be
automaticly created regardless of any way.
I may not easily restart the new Master because of the product availability.
So I want to find a good idea for handle the case.
The WARNING message
(SELECTWARNING: pgstat wait timeout) exists as soon as I query the stats info
on the new Master.The replication process is ok.
Thanks again!
River
------------------ Original ------------------
From: "Prashanth Ranjalkar"<prashant.ranjal...@gmail.com>;
Date: Thu, Apr 11, 2013 10:31 PM
To: "X.H.----WANG"<82661...@qq.com>;
Cc: "Vasilis Ventirozos"<v.ventiro...@gmail.com>;
"pgsql-admin"<pgsql-admin@postgresql.org>;
Subject: Re: [ADMIN] with PostgreSQL 9.1.9,the stats collector process is not
work!
Would you mind providing more insights on type of replication that is in use as
email states that switch performed from slave to master ?
Initial glance points towards catalog corruptions however would like to
understand the replication methodology used here..
Thanks & Regards,
Prashanth Ranjalkar
Database Consultant & Architect
Skype:prashanth.ranjalkar
www.postgresdba.net
On Thu, Apr 11, 2013 at 1:51 PM, X.H.----WANG <82661...@qq.com> wrote:
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
