| From: | "Pavan Deolasee" <pavan(dot)deolasee(at)enterprisedb(dot)com> |
|---|---|
| To: | <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | HOT WIP Patch - Version 5.0 |
| Date: | 2007-03-21 05:57:30 |
| Message-ID: | 4600C94A.6030609@enterprisedb.com |
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| Thread: | |
| Lists: | pgsql-hackers |
The version 5.0 of HOT WIP patch is posted on pgsql-patches. This
fixes the VACUUM FULL issue with HOT. In all the earlier versions,
I'd disabled VACUUM FULL.
When we move the HOT-chain, we move the chains but don't carry
the HOT_UPDATED or HEAP_ONLY flags and insert as many index
entries as there are tuples in the chain. IOW the HOT-update
is actually turned into a COLD chain.
Apart from this, I'd to make some changes to the VACUUM FULL
code so that the number of indexed tuples is counted
correctly. With HOT, whenever a HEAP_ONLY tuple is moved, an
additional index entry is generated and this needs to be
taken into account.
Please let me know comments/suggestions.
Thanks,
Pavan
--
EnterpriseDB http://www.enterprisedb.com
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