Re: Statistics Import and Export

On Fri, Mar 14, 2025 at 4:03 PM Corey Huinker <corey(dot)huinker(at)gmail(dot)com>
wrote:

> New patches and a rebase.
>
> 0001 - no changes, but the longer I go the more I'm certain this is
> something we want to do.
> 0002- same as 0001
>
> 0003 -
>
> Storing the restore function calls in the archive entry hogged a lot of
> memory and made people nervous. This introduces a new function pointer that
> generates those restore SQL calls right before they're written to disk,
> thus reducing the memory load from "stats for every object to be dumped" to
> just one object. Thanks to Nathan for diagnosing some weird quirks with
> various formats.
>
> 0004 -
>
> This replaces the query in the prepared statement with one that batches
> them 100 relations at a time, and then maintains that result set until it
> is consumed. It seems to have obvious speedups.
>

Another rebase, and a new patch 0005 to have pg_dump fetch and restore
relallfrozen for dbs of version 18 and higher. With older versions we omit
relallfrozen and let the import function assign the default.