| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Masahiko Sawada <sawada(dot)mshk(at)gmail(dot)com> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Reviewing freeze map code |
| Date: | 2016-07-15 03:53:07 |
| Message-ID: | 20160715035307.3g7b43ydmp2lu42f@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
On 2016-07-13 23:06:07 -0700, Andres Freund wrote:
> won't enter the branch, because HEAP_XMAX_LOCK_ONLY won't be set. Which
> will leave t_ctid and HEAP_HOT_UPDATED set differently on the master and
> standby / after crash recovery. I'm failing to see any harmful
> consequences right now, but differences between master and standby are a bad
> thing.
I think it's actually critical, because HEAP_HOT_UPDATED /
HEAP_XMAX_LOCK_ONLY are used to terminate ctid chasing loops (like
heap_hot_search_buffer()).
Andres
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