On 2021-04-21 16:55:28 -0400, Tom Lane wrote: > My concern about it was not at all about performance, but that every time > you write it is a new opportunity for the filesystem to lose or corrupt > the data.
We already do, sometimes very frequent, control file updates on standbys to update minRecoveryLSN. I don't recall reports of that causing corruption issues. So I'd not be too concerned about that aspect?
Or perhaps we should consider having multiple copies..? Though I definitely have seen missing WAL causing difficult to realize / detect corruption more than corrupt pg_control files...