Re: Snapshot scalability patch issue

Andres Freund <andres@anarazel.de>

From: Andres Freund <andres@anarazel.de>
To: Peter Geoghegan <pg@bowt.ie>
Cc: PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2021-02-15T23:08:40Z
Lists: pgsql-hackers
Hi,

On 2021-02-14 18:42:18 -0800, Peter Geoghegan wrote:
> The call to heap_page_prune() within lazy_scan_heap() passes a bool
> literal ('false') as its fourth argument. But the fourth argument is
> of type TransactionId, not bool. This has been the case since the
> snapshot scalability work performed by commit dc7420c2c92. Surely
> something is amiss here.

Looks like I accidentally swapped the InvalidTransactionId and false
around - luckily they have the same actual bit pattern...

I do wish C could pass arguments by name.

I'll push something once I'm back at my computer...

Greetings,

Andres Freund



Commits

  1. Fix heap_page_prune() parameter order confusion introduced in dc7420c2c92.

  2. snapshot scalability: Don't compute global horizons while building snapshots.