Can min_wal_size bigger than max_wal_size?

All we need is an easy explanation of the problem, so here it is.

is it possible if min_wal_size bigger than max_wal_size ? What happen if it does ? What are the circumstances when min_wal is bigger than max_wal ?

I am using PG 12.


How to solve :

I know you bored from this bug, So we are here to help you! Take a deep breath and look at the explanation of your problem. We have many solutions to this problem, But we recommend you to use the first method because it is tested & true method that will 100% work for you.

Method 1

Yes, min_wal_size can be bigger than max_wal_size. Despite the similar names, these settings are not related to each other.

max_wal_size will trigger checkpoint after so many wal writes.

min_wal_size will always recycle wal files for future use (rather than removed) as long as WAL disk usage stays below this setting. Can be used for guaranteed space reservation for a future WAL writes.

Note: Use and implement method 1 because this method fully tested our system.
Thank you 🙂

All methods was sourced from or, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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