Re: Replication: slave server has 3x size of production server?

[Adrian Klaver <adrian.klaver@xxxxxxxxxxx>]

On 2/22/20 10:05 AM, Edson Richter wrote:
>     ------------------------------------------------------------------------
>
>     *De:* Adrian Klaver <adrian.klaver@xxxxxxxxxxx>
>     *Enviado:* sábado, 22 de fevereiro de 2020 14:33
>     *Para:* Edson Richter <edsonrichter@xxxxxxxxxxx>; pgsql-general
>     <pgsql-general@xxxxxxxxxxxxxx>
>     *Assunto:* Re: Replication: slave server has 3x size of production
>     server?
>     On 2/22/20 9:25 AM, Edson Richter wrote:
>     > Hi!
>     > 
>     > I've a database cluster created at 9.6.10 linux x64 server rhel. I made 
>     > progressive upgrades, first upgrading slave and then upgrading master.
>     > Actually both are running 9.6.17.
>     > Current production server has 196Gb in size.
>     > Nevertheless, the replicated (slave) server has 598 Gb in size.
>     > Replication server has 3x size of production server, is that normal?
>
>     How are you measuring the sizes?
>
>
> This is the command:
>
> du --max-depth 1 -h pgDbCluster
>
>
> Production:
>
> du --max-depth 1 -h pgDbCluster
>
> 56M     pgDbCluster/pg_log
> 444K    pgDbCluster/global
> 4,0K    pgDbCluster/pg_stat
> 4,0K    pgDbCluster/pg_snapshots
> 16K     pgDbCluster/pg_logical
> 20K     pgDbCluster/pg_replslot
> 61M     pgDbCluster/pg_subtrans
> 4,0K    pgDbCluster/pg_commit_ts
> 465M    pgDbCluster/pg_xlog
> 4,0K    pgDbCluster/pg_twophase
> 12M     pgDbCluster/pg_multixact
> 4,0K    pgDbCluster/pg_serial
> 195G    pgDbCluster/base
> 284K    pgDbCluster/pg_stat_tmp
> 12M     pgDbCluster/pg_clog
> 4,0K    pgDbCluster/pg_dynshmem
> 12K     pgDbCluster/pg_notify
> 4,0K    pgDbCluster/pg_tblspc
> 196G    pgDbCluster
>
>
> Slave:
>
> du -h --max-depth 1 pgDbCluster
>
> 403G    pgDbCluster/pg_xlog
> 120K    pgDbCluster/pg_log
> 424K    pgDbCluster/global
> 0       pgDbCluster/pg_stat
> 0       pgDbCluster/pg_snapshots
> 4,0K    pgDbCluster/pg_logical
> 8,0K    pgDbCluster/pg_replslot
> 60M     pgDbCluster/pg_subtrans
> 0       pgDbCluster/pg_commit_ts
> 0       pgDbCluster/pg_twophase
> 11M     pgDbCluster/pg_multixact
> 0       pgDbCluster/pg_serial
> 195G    pgDbCluster/base
> 12M     pgDbCluster/pg_clog
> 0       pgDbCluster/pg_dynshmem
> 8,0K    pgDbCluster/pg_notify
> 12K     pgDbCluster/pg_stat_tmp
> 0       pgDbCluster/pg_tblspc
> 598G    pgDbCluster

So the WAL logs are not being cleared.

What replication method is being used?

What are the settings for the replication?

> Edson

--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx