[pgpool-general: 5962] Re: pgpool load balancing problem

[Mariel Cherkassky]

pool_version

----------------------

3.7.2 (amefuriboshi)

(1 row)





psql -d postgres -U postgres -h 127.0.0.1  -p 9999 -c "show pool_nodes";



node_id |    hostname     | port | status | lb_weight |  role   |
select_cnt | load_balance_node | replication_delay

---------+-----------------+------+--------+-----------+---------+------------+-------------------+-------------------

0       | pg1 | 5432 | up     | 0.333333  | standby | 22565      |
true              | 0

1       | pg2 | 5432 | up     | 0.333333  | primary | 10416      |
false             | 0

2       | pg3 | 5432 | up     | 0.333333  | standby | 7686       |
false             | 0

(3 rows)


2018-03-01 6:23 GMT+02:00 Tatsuo Ishii <ishii at sraoss.co.jp>:

> > I found a problem that had a big impact on our servers. I'm using pgpool
> as
> > a load balancer and pool connections manager. When a user tries to run a
> > select query it redirects the query to the slave. If the user tries after
> > that to run dml or ddl command he get error :
> >
> > ERROR: cannot execute CREATE TABLE in a read-only transaction
> > SQL state: 25006
> >
> > Is there any way to solve this issue ? It means that once the pool
> > redirected your session to the slaves you cant run any ddl/dml actions ..
>
> Normaly Pgpool-II redirects any ddl/dml query to primary.  Can you
> show me following query results? I would like to confirm your problem.
>
> show pool_version;
> show pool_nodes;
>
> Best regards,
> --
> Tatsuo Ishii
> SRA OSS, Inc. Japan
> English: http://www.sraoss.co.jp/index_en.php
> Japanese:http://www.sraoss.co.jp
>
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