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From: Colin 't Hart <[email protected]>
To: PostgreSQL General <[email protected]>
Subject: wal segment size
Date: Wed, 17 Dec 2025 16:13:37 +0100
Message-ID: <CAMon-aQ8X7H7jCC6ggKm9Uzcu3KfGVC34RRqKt8BCfpDn2tq9A@mail.gmail.com> (raw)

Hi,

I see very little advice on tuning WAL segment size.

One of my clients has a few datawarehouses at around 8 - 16 TB

On one of the nodes there are approx 15000 WAL segments of 16MB each,
totalling approx 230GB. The archiver is archiving approx one per second, so
approx 4 hours to clear.

Would we gain anything by bumping the WAL segment size?

Thanks,

Colin

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