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WAL segments held for replcation - Mailing list pgsql-admin

From Prince Pathria
Subject WAL segments held for replcation
Date
Msg-id CAON0DawEmb-cBqBwzk2-dXgvVqNa137sZsqJXPmuTAWH_BGPGQ@mail.gmail.com
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Responses Re: WAL segments held for replcation
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Hi,

I have following config
wal_buffers = 16MB
min_wal_size = 1GB
max_wal_size = 2GB
synchronous_commit = on      
archive_mode = on
archive_command = 'cp %p /opt/postgres/%f'
max_wal_senders = 4
wal_keep_segments = 1024
synchronous_standby_names = 'pgslave01'


1. Can we raise wal segment size to more than 16MB and is it same as `wal_buffers` ?

2. During data loading I'm pushing 4GB data, and taking an assumption that my network is slow,
Will master keep the segments in pg_wal more than wal_keep_segment value such that it's pulled by standby nodes or it will wipe if off?

3. 1024 wal_keep_segments of 16 mb each makes 16GB of segments kept but I have kept max_wal_size = 2GB. Which one will be prioritised max_wal_size or wal_keep_segment?

Thanks! 

Prince Pathria
Systems Architect Intern Evive +91 9478670472 goevive.com

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