From: | Zoltan Boszormenyi <zb(at)cybertec(dot)at> |
---|---|
To: | pgsql-patches <pgsql-patches(at)postgresql(dot)org> |
Cc: | Hans-Juergen Schoenig <hs(at)cybertec(dot)at> |
Subject: | 64-bit CommandIds |
Date: | 2008-03-04 17:27:01 |
Message-ID: | 47CD8665.7070903@cybertec.at |
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Lists: | pgsql-patches |
Hi,
attached is our patch against HEAD which enables extending CommandIds
to 64-bit. This is for enabling long transactions that really do that much
non-read-only work in one transaction.
The feature is off by default, you need to --enable-huge-commandid.
It fails only one regression test (without_oid) that measures the saved
space in 8.3.
Also, modifying FirstCommandId to be (1<<32ULL - 4) to early overflow
the 32-bit limit) doesn't show any real problem besides the combocid
regression failure that explicitly lists cmin/cmax values, which is
expected.
It was written by Zoltán Böszörményi <zb(at)cybertec(dot)at> and
Hans-Jürgen Schönig <hs(at)cybertec(dot)at>
Best regards,
Zoltán Böszörményi
--
----------------------------------
Zoltán Böszörményi
Cybertec Schönig & Schönig GmbH
http://www.postgresql.at/
Attachment | Content-Type | Size |
---|---|---|
pg84-64-bit-cmdid.patch | text/x-patch | 15.5 KB |
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