RE: Replication: slave server has 3x size of production server? - Mailing list pgsql-general

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De: Adrian Klaver <adrian.klaver@aklaver.com>
Enviado: sábado, 22 de fevereiro de 2020 16:16
Para: Edson Richter <edsonrichter@hotmail.com>; pgsql-general <pgsql-general@postgresql.org>
Assunto: Re: Replication: slave server has 3x size of production server?

 

On 2/22/20 11:03 AM, Edson Richter wrote:
>     ------------------------------------------------------------------------
>

>
>
> Streaming replication. Initiated via pg_basebackup.
>
> Settings on master server:
>
> # - Sending Server(s) -
> # Set these on the master and on any standby that will send replication
> data.
> max_wal_senders = 2             # max number of walsender processes
> (change requires restart)
> wal_keep_segments = 25          # in logfile segments, 16MB each; 0 disables
> #wal_sender_timeout = 60s       # in milliseconds; 0 disables
> max_replication_slots = 2       # max number of replication
> slots (change requires restart)
> #track_commit_timestamp = off   # collect timestamp of transaction
> commit (change requires restart)
> # - Master Server -
> # These settings are ignored on a standby server.
> #synchronous_standby_names = '' # standby servers that provide sync
> rep number of sync standbys and comma-separated list of
> application_name from standby(s); '*' = all
> #vacuum_defer_cleanup_age = 0   # number of xacts by which cleanup is
> delayed
>
>
>
> Settings on slave server:
>
> # - Standby Servers -
> # These settings are ignored on a master server.
> hot_standby = on                        # "on" allows queries during
> recovery (change requires restart)
> max_standby_archive_delay = -1          # max delay before canceling
> queries when reading WAL from archive; -1 allows indefinite delay
> max_standby_streaming_delay = -1        # max delay before canceling
> queries when reading streaming WAL; -1 allows indefinite delay
> wal_receiver_status_interval = 10s      # send replies at least this
> often 0 disables
> hot_standby_feedback = on               # send info from standby to
> prevent query conflicts
> wal_receiver_timeout = 0                # time that receiver waits for
> communication from master in milliseconds; 0 disables
> wal_retrieve_retry_interval = 5s        # time to wait before retrying
> to retrieve WAL after a failed attempt

What are the settings for:

archive_mode
archive_command

on the standby?

Are the files in pg_xlog on the standby mostly from well in the past?