| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Andres Freund <andres(at)2ndquadrant(dot)com> |
| Cc: | pgsql-hackers(at)postgresql(dot)org, Robert Haas <robertmhaas(at)gmail(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, "devrim(at)gunduz(dot)org" <devrim(at)gunduz(dot)org> |
| Subject: | Re: Re: [COMMITTERS] pgsql: Properly set relpersistence for fake relcache entries. |
| Date: | 2012-09-17 13:58:37 |
| Message-ID: | 234.1347890317@sss.pgh.pa.us |
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Andres Freund <andres(at)2ndquadrant(dot)com> writes:
> Btw, I played with this some more on Saturday and I think, while definitely a
> bad bug, the actual consequences aren't as bad as at least I initially feared.
> Fake relcache entries are currently set in 3 scenarios during recovery:
> 1. removal of ALL_VISIBLE in heapam.c
> 2. incomplete splits and incomplete deletions in nbtxlog.c
> 3. incomplete splits in ginxlog.c
> [ #1 doesn't really hurt in 9.1, and the others are low probability ]
OK, that explains why we've not seen a blizzard of trouble reports.
Still seems like a good idea to fix it ASAP, though.
regards, tom lane
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