postgres

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Alvaro Herrera fa40685b95 Fix longstanding problems in VACUUM caused by untimely interruptions In VACUUM FULL, an interrupt after the initial transaction has been recorded as committed can cause postmaster to restart with the following error message: PANIC: cannot abort transaction NNNN, it was already committed This problem has been reported many times. In lazy VACUUM, an interrupt after the table has been truncated by lazy_truncate_heap causes other backends' relcache to still point to the removed pages; this can cause future INSERT and UPDATE queries to error out with the following error message: could not read block XX of relation 1663/NNN/MMMM: read only 0 of 8192 bytes The window to this race condition is extremely narrow, but it has been seen in the wild involving a cancelled autovacuum process. The solution for both problems is to inhibit interrupts in both operations until after the respective transactions have been committed. It's not a complete solution, because the transaction could theoretically be aborted by some other error, but at least fixes the most common causes of both problems.		16 years ago
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alter.h	Update copyrights in source tree to 2008.	18 years ago
async.h	Update copyrights in source tree to 2008.	18 years ago
cluster.h	Update copyrights in source tree to 2008.	18 years ago
comment.h	Update copyrights in source tree to 2008.	18 years ago
conversioncmds.h	Update copyrights in source tree to 2008.	18 years ago
copy.h	Update copyrights in source tree to 2008.	18 years ago
dbcommands.h	Update copyrights in source tree to 2008.	18 years ago
defrem.h	Update copyrights in source tree to 2008.	18 years ago
discard.h	Update copyrights in source tree to 2008.	18 years ago
explain.h	Update copyrights in source tree to 2008.	18 years ago
lockcmds.h	Update copyrights in source tree to 2008.	18 years ago
portalcmds.h	Update copyrights in source tree to 2008.	18 years ago
prepare.h	Update copyrights in source tree to 2008.	18 years ago
proclang.h	Fix REASSIGN OWNED so that it works on procedural languages too.	18 years ago
schemacmds.h	Update copyrights in source tree to 2008.	18 years ago
sequence.h	Update copyrights in source tree to 2008.	18 years ago
tablecmds.h	Add checks to TRUNCATE, CLUSTER, and REINDEX to prevent performing these	18 years ago
tablespace.h	Update copyrights in source tree to 2008.	18 years ago
trigger.h	Mark SessionReplicationRole as PGDLLIMPORT so it	18 years ago
typecmds.h	Update copyrights in source tree to 2008.	18 years ago
user.h	pgindent run for 8.2.	20 years ago
vacuum.h	Fix longstanding problems in VACUUM caused by untimely interruptions	16 years ago
variable.h	Update copyrights in source tree to 2008.	18 years ago
version.h	Update copyrights in source tree to 2008.	18 years ago
view.h	Update copyrights in source tree to 2008.	18 years ago