On Fri, Aug 17, 2018 at 6:41 PM Andres Freund <and...@anarazel.de> wrote: > On 2018-08-17 11:35:40 -0400, Tom Lane wrote: > > Andres Freund <and...@anarazel.de> writes: > > > On 2018-08-17 18:00:20 +0300, Alexander Korotkov wrote: > > >> So, do we have any objections to committing this? > > > > > I think this needs more review by other senior hackers in the community. > > > > TBH it sounds like a horrible hack. Disable vacuum truncation? > > There's another patch, which I thought Alexander was referring to, that > does something a bit smarger. On a super short skim it seems to > introduce a separate type of AEL lock that's not replicated, by my > reading?
Yes, that's correct. On standby read-only queries can tolerate concurrent heap truncation. So, there is no point to replicate AEL to standby. Previous versions of patch tries to do that by introducing some flag. But it appears that correct way to do this is just new non-replicated type of AEL lock. ------ Alexander Korotkov Postgres Professional: http://www.postgrespro.com The Russian Postgres Company
