postgres

History

Tom Lane cbe9d6beb4 Fix up rickety handling of relation-truncation interlocks. Move rd_targblock, rd_fsm_nblocks, and rd_vm_nblocks from relcache to the smgr relation entries, so that they will get reset to InvalidBlockNumber whenever an smgr-level flush happens. Because we now send smgr invalidation messages immediately (not at end of transaction) when a relation truncation occurs, this ensures that other backends will reset their values before they next access the relation. We no longer need the unreliable assumption that a VACUUM that's doing a truncation will hold its AccessExclusive lock until commit --- in fact, we can intentionally release that lock as soon as we've completed the truncation. This patch therefore reverts (most of) Alvaro's patch of 2009-11-10, as well as my marginal hacking on it yesterday. We can also get rid of assorted no-longer-needed relcache flushes, which are far more expensive than an smgr flush because they kill a lot more state. In passing this patch fixes smgr_redo's failure to perform visibility-map truncation, and cleans up some rather dubious assumptions in freespace.c and visibilitymap.c about when rd_fsm_nblocks and rd_vm_nblocks can be out of date.		16 years ago
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alter.h	Update copyright for the year 2010.	16 years ago
async.h	Update copyright for the year 2010.	16 years ago
cluster.h	Create a "relation mapping" infrastructure to support changing the relfilenodes	16 years ago
comment.h	Update copyright for the year 2010.	16 years ago
conversioncmds.h	Update copyright for the year 2010.	16 years ago
copy.h	Update copyright for the year 2010.	16 years ago
dbcommands.h	Update copyright for the year 2010.	16 years ago
defrem.h	Update copyright for the year 2010.	16 years ago
discard.h	Update copyright for the year 2010.	16 years ago
explain.h	Update copyright for the year 2010.	16 years ago
lockcmds.h	Update copyright for the year 2010.	16 years ago
portalcmds.h	Update copyright for the year 2010.	16 years ago
prepare.h	Update copyright for the year 2010.	16 years ago
proclang.h	8.4 pgindent run, with new combined Linux/FreeBSD/MinGW typedef list	16 years ago
schemacmds.h	Update copyright for the year 2010.	16 years ago
sequence.h	Remove all the special-case code for INT64_IS_BUSTED, per decision that	16 years ago
tablecmds.h	Tighten integrity checks on ALTER TABLE ... ALTER COLUMN ... RENAME.	16 years ago
tablespace.h	Further fixes for per-tablespace options patch.	16 years ago
trigger.h	Improve the handling of SET CONSTRAINTS commands by having them search	16 years ago
typecmds.h	Update copyright for the year 2010.	16 years ago
user.h	Add a hook to CREATE/ALTER ROLE to allow an external module to check the	16 years ago
vacuum.h	Fix up rickety handling of relation-truncation interlocks.	16 years ago
variable.h	Update copyright for the year 2010.	16 years ago
view.h	Update copyright for the year 2010.	16 years ago