| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Alex Ignatov <a(dot)ignatov(at)postgrespro(dot)ru>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Why we don't have checksums on clog files |
| Date: | 2016-06-13 02:54:54 |
| Message-ID: | 21784.1465786494@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> On Tue, Jun 7, 2016 at 10:41 AM, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>> I think it will be better if users can have an option to checksum clog
>> pages. However, I think that will need a change in page (CLOG-page) format
>> which might not be a trivial work to accomplish.
> Doesn't the pd_checksum field exist on SLRU pages also?
Uh, no.
(I don't think that's an inherent property of slru.c, but definitely
clog.c packs the pages totally fully of xact status bits. See
CLOG_XACTS_PER_PAGE.)
regards, tom lane
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