Re: streaming replication and wal 's usages

ghiureai wrote:
> I am running PG 10.2 with streaming replication, no archiving option
> with 10 slots replication option , I had the slave down for 6 hours
> which generated 56GB of wal files in pg_wal dir, after slave was brougt
> online and catchup with master , the wal dir was still growing on slave
> with more than 25GB where in archive_status where all the files where in
> *.done files , eventually the /wal directory reached 100% but still no
> wal files removed from archive_status
>
> I am trying to understand what I am missing in this confg ( the master
> and slave are cfg for pg_dump backups the switch-over is done with
> pg_basebackup using repmgr4.2.last release )
>
> the present db size 140GB OLTP type transactions , with an avg 10-12GB
> new data growth per day.
>
> Here is my cfg
>
> wal_keep_segments = 300
> max_replication_slots=10
> wal_log_hints = on
> checkpoint_timeout = 5min
> max_wal_size = 1GB
> min_wal_size = 80MB
> archive_mode=off
>
> hot_standby =on

You are not using replication slots, right?

Check pg_replication_slots to see if you have abandoned replication slots;
that could cause old WAL to be retained.

Yours,
Laurenz Albe
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