[pgpool-general: 6994] Re: Empty values for replication_state and replication_sync_state columns with pcp_node_info

[Lucas Luengas]

Hello
I don't had configured application_name in primary_conninfo of
postgresql.conf.
I have configured application_name=server2. It's same value such as
backend_application_name1
Thank you very much.


On Mon, Apr 20, 2020 at 10:15 AM Tatsuo Ishii <ishii at sraoss.co.jp> wrote:

> Have you set application_name in primary_conninfo of postgresql.conf?
>
> > Hello
> > Thanks for your fast reply.
> > I have configured these values: backend_application_name0 and
> > backend_application_name1.
> >
> > [root at server1 pgpool-II]# psql -h 172.16.0.1 -p 9999 -U nobody -c
> "pgpool
> > show backend_application_name0" postgres
> >  backend_application_name0
> > ---------------------------
> >  server1
> > (1 row)
> >
> > [root at server1 pgpool-II]# psql -h 172.16.0.1 -p 9999 -U nobody -c
> "pgpool
> > show backend_application_name1" postgres
> >  backend_application_name1
> > ---------------------------
> >  server2
> > (1 row)
> >
> > [root at server1 pgpool-II]#
> >
> >
> >
> > On Mon, Apr 20, 2020 at 9:54 AM Tatsuo Ishii <ishii at sraoss.co.jp> wrote:
> >
> >> You need to set application name.
> >> See
> https://www.pgpool.net/pipermail/pgpool-general/2020-April/007022.html
> >>
> >> Best regards,
> >> --
> >> Tatsuo Ishii
> >> SRA OSS, Inc. Japan
> >> English: http://www.sraoss.co.jp/index_en.php
> >> Japanese:http://www.sraoss.co.jp
> >>
> >> > Empty values for replication_state and replication_sync_state columns
> >> with
> >> > pcp_node_info
> >> >
> >> > Hello.
> >> >
> >> > I have testing pgpool 4.1.1 with Postgresql 12.2 on Linux Centos 7.
> >> >
> >> > I get empty values for replication_state and replication_sync_state
> >> columns
> >> > with pcp_node_info or show pool_nodes.
> >> >
> >> > I have two servers. I have configured Postgresql streaming replication
> >> and
> >> > it's running with success. I get info for replication using sql
> sentence
> >> > pg_stat_replication.
> >> > For pgpool, I have configure backend_application_name0,
> >> > backend_application_name1, sr_check_period (10) and sr_check_user
> >> (nobody).
> >> > Using sr_check_user = postgres I get same results (empty values for
> >> > replication_state and replication_sync_state columns).
> >> >
> >> > What am I doing wrong?
> >> >
> >> > Then I show some information:
> >> >
> >> >
> >> > [root at server1 pgpool-II]# pcp_node_info --host 172.16.0.1 --port 9898
> >> > --username admin -w --node-id 0
> >> > 172.16.0.1 5432 2 0.500000 up primary 0   2020-04-20 09:38:04
> >> >
> >> > [root at server1 pgpool-II]# pcp_node_info --host 172.16.0.1 --port 9898
> >> > --username admin -w --node-id 1
> >> > 172.16.0.2 5432 2 0.500000 up standby 0   2020-04-20 09:38:04
> >> >
> >> > [root at server1 pgpool-II]# pcp_node_info --host 172.16.0.1 --port 9898
> >> > --username admin -w --node-id 0 --verbose
> >> > Hostname               : 172.16.0.1
> >> > Port                   : 5432
> >> > Status                 : 2
> >> > Weight                 : 0.500000
> >> > Status Name            : up
> >> > Role                   : primary
> >> > Replication Delay      : 0
> >> > Replication State      :
> >> > Replication Sync State :
> >> > Last Status Change     : 2020-04-20 09:38:04
> >> > [root at server1 pgpool-II]# pcp_node_info --host 172.16.0.1 --port 9898
> >> > --username admin -w --node-id 1 --verbose
> >> > Hostname               : 172.16.0.2
> >> > Port                   : 5432
> >> > Status                 : 2
> >> > Weight                 : 0.500000
> >> > Status Name            : up
> >> > Role                   : standby
> >> > Replication Delay      : 0
> >> > Replication State      :
> >> > Replication Sync State :
> >> > Last Status Change     : 2020-04-20 09:38:04
> >> > [root at server1 pgpool-II]#
> >> >
> >> >
> >> >
> >> > [root at server1 ~]# psql -h 172.16.0.1 -p 9999 -U nobody -c "select *
> from
> >> > pg_stat_replication" postgres
> >> >  pid  | usesysid |  usename  | application_name | client_addr |
> >> > client_hostname | client_port |         backend_start         | backen
> >> > d_xmin |   state   |  sent_lsn  | write_lsn  | flush_lsn  |
> replay_lsn |
> >> > write_lag | flush_lag | replay_lag | sync_priority | sync_sta
> >> > te |          reply_time
> >> >
> >>
> ------+----------+-----------+------------------+-------------+-----------------+-------------+-------------------------------+-------
> >> >
> >>
> -------+-----------+------------+------------+------------+------------+-----------+-----------+------------+---------------+---------
> >> > ---+-------------------------------
> >> >  3664 |    16384 | userrepli | walreceiver      | 172.16.0.2  |
> >> >     |       47482 | 2020-04-20 09:10:20.191692+02 |
> >> >    522 | streaming | 0/19001298 | 0/19001298 | 0/19001298 |
> 0/19001298 |
> >> >         |           |            |             0 | async
> >> >    | 2020-04-20 09:33:32.341974+02
> >> > (1 row)
> >> >
> >> > [root at server1 ~]#
> >> >
> >> >
> >> > [root at server1 ~]# pgpool -v
> >> > pgpool-II version 4.1.1 (karasukiboshi)
> >> > [root at server1 ~]#
> >> >
> >> > [root at server1 ~]# psql -V
> >> > psql (PostgreSQL) 12.2
> >> > [root at server1 ~]#
> >> >
> >> >
> >> > [root at server1 ~]# psql -h 172.16.0.1 -p 9999 -U nobody -c "pgpool
> show
> >> > sr_check_period" postgres
> >> >  sr_check_period
> >> > -----------------
> >> >  10
> >> > (1 row)
> >> >
> >> > [root at server1 ~]# psql -h 172.16.0.1 -p 9999 -U nobody -c "pgpool
> show
> >> > sr_check_user" postgres
> >> >  sr_check_user
> >> > ---------------
> >> >  nobody
> >> > (1 row)
> >> >
> >> > [root at server1 ~]#
> >> >
> >> > [root at server1 ~]# psql -h 172.16.0.1 -p 9999 -U nobody -c "pgpool
> show
> >> > backend_application_name0" postgres
> >> >  backend_application_name0
> >> > ---------------------------
> >> >  server1
> >> > (1 row)
> >> >
> >> > [root at server1 ~]# psql -h 172.16.0.1 -p 9999 -U nobody -c "pgpool
> show
> >> > backend_application_name1" postgres
> >> >  backend_application_name1
> >> > ---------------------------
> >> >  server2
> >> > (1 row)
> >> >
> >> > [root at server1 ~]#
> >> >
> >> >
> >> > [root at server1 ~]# psql -h 172.16.0.1 -p 9999 -U nobody -c "show
> >> pool_nodes"
> >> > postgres
> >> >  node_id |  hostname  | port | status | lb_weight |  role   |
> select_cnt
> >> |
> >> > load_balance_node | replication_delay | replication_state |
> >> >  replication_sync_state | last_status_change
> >> >
> >>
> ---------+------------+------+--------+-----------+---------+------------+-------------------+-------------------+-------------------+
> >> > ------------------------+---------------------
> >> >  0       | 172.16.0.1 | 5432 | up     | 0.500000  | primary | 0
> >> |
> >> > true              | 0                 |                   |
> >> >                         | 2020-04-20 09:23:40
> >> >  1       | 172.16.0.2 | 5432 | up     | 0.500000  | standby | 0
> >> |
> >> > false             | 0                 |                   |
> >> >                         | 2020-04-20 09:23:40
> >> > (2 rows)
> >> >
> >> > [root at server1 ~]#
> >> >
> >> > Thanks in advance. Regards
> >>
>
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