Wal_keep_segment value too high

On 10 July 2020 10:26:25 CEST, Brajendra Pratap Singh <singh.bpratap766@gmail.com> wrote:

Hi,

What will happen if the wal_keep_segments value is too high ,is this

wasted disk space.

What do you want to achive?

Regards, Andreas

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2ndQuadrant - The PostgreSQL Support Company

Hi Andreas,

Actually there will be sync gap almost 3-4hours during the ETL jobs between
primary and streaming replication db ,so I just want to make sure is there
any affect in replication bcoz of high value of wal_keep_segments .

Second thing we have implemented pgbackrest in archive_command so archive
name will generate in zipped format along with some binary so what will be
the restore_command for that if we lose any wals from wal directory of
primary db and how it will be applying to replication db via
restore_command means is it require password less ssh between primary and
replica.

Third thing is the high value of wal_keep_segment anyhow affect the
checkpoint operation ,dml operation,select query or data write operation
from memory to disk?

Thanks,
Brajendra

On Fri, 10 Jul, 2020, 5:44 PM Andreas Kretschmer, <andreas@a-kretschmer.de>
wrote: