Greetings, * Andres Freund (and...@anarazel.de) wrote: > On 2021-04-21 15:51:38 -0400, Stephen Frost wrote: > > It does seem like we have some trade-offs here to weigh, but > > pg_control is indeed quite small.. > > What do you mean by that? That the overhead of writing it out more > frequently wouldn't be too bad? Or that we shouldn't "unnecessarily" add > more fields to it?
Mostly just that the added overhead in writing it out more frequently wouldn't be too bad. Adding fields runs the risk of crossing the threshold where we feel that we can safely assume all of it will make it to disk in one shot and therefore there's more reason to not add extra fields to it, if possible. Seems the missing bit here is "how often, and how do we make that happen?" and then we can discuss if there's reason to be concerned that it would be 'too frequent' or cause too much additional overhead in terms of IO/fsyncs. Thanks, Stephen
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