This has happened to us where we have dead or unmanaged consumer. Turns out londiste is keeping the event even if the consumer is unreachable. This is to ensure that the consumer gets what it should.
To clean this up, delete the unused/dead consumer, with qadmin or manually if necessary. The table won't be deleted immediately though. We have to restart pgqd and workers and wait for two days.
~
Saiful Muhajir
On 19 May 2016 20:01, "Rene ." <
rene0_3@hotmail.com> wrote:
Queue - Event are stored in queue tables i.e queues. Several producers can write
into same queue and several consumers can read from the queue. Events are kept
in queue until all the consumers have seen them.
Maybe you have some inactive consumers holding a event tables.
qadmin -h <root_node_host> -p 5432 -U postgres -d <database name> -Q <queue name>
Use 'show help;' to see available commands.
copy output of show consumer command
show consumer;
Rene
________________________________________
From: pgsql-general-owner@postgresql.org <pgsql-general-owner@postgresql.org> on behalf of Leonardo M. Ramé <l.rame@griensu.com>
Sent: Thursday, May 19, 2016 2:43 PM
To: PostgreSql-general
Subject: Re: [GENERAL] Londiste 3 pgq events_1_1 table huge
El 18/05/16 a las 19:03, Rene . escribió:
> Hi, Check for long running Idle in transaction sessions. Idle in transaction sessions may holding events table from cleaning itself up.
> If there is more then days long running idle in transaction sessions, kill them, event table should be cleaned automatically after that.
>
> "select pid,state, query_start from pg_stat_activity where state='idle in transaction';" for checking sessions.
>
> Rene
Thanks Rene, I found only one "idle in transaction" and it dates from
just a couple of minutes ago, so, the reason of huge event table must be
something else.
By looking at the event_1_1 table I found records from march, but
londiste3 status shows everything is already in sync:
nodo_master (root)
| Tables: 146/0/0
| Lag: 0s, Tick: 1112197
+--: node_esclavo (leaf)
Tables: 146/0/0
Lag: 0s, Tick: 1112197
So, what if I manually delete old events?.
Regards,
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Leonardo M. Ramé
Medical IT - Griensu S.A.
Av. Colón 636 - Piso 8 Of. A
X5000EPT -- Córdoba
Tel.: +54(351)4246924 +54(351)4247788 +54(351)4247979 int. 19
Cel.: +54 9 (011) 40871877
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