| From: | Gregory Stark <stark(at)enterprisedb(dot)com> |
|---|---|
| To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | <pgsql-patches(at)postgreSQL(dot)org> |
| Subject: | Re: WIP patch for latestCompletedXid method of computing snapshot xmax |
| Date: | 2007-09-08 01:48:26 |
| Message-ID: | 878x7i0vx1.fsf@oxford.xeocode.com |
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| Lists: | pgsql-hackers pgsql-patches |
"Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
> This patch implements Florian's idea about how to manage snapshot xmax
> without the ugly and performance-losing tactic of taking XidGenLock and
> ProcArrayLock at the same time. I had to do a couple of slightly klugy
> things to get bootstrap and prepared transactions to work, but on the
> whole it seems at least as clean as the code we have now. Comments?
Just that it will be fascinating to see what effects this has on the
benchmarks.
--
Gregory Stark
EnterpriseDB http://www.enterprisedb.com
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