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Tom Lane 611b4393f2 Make TransactionIdIsInProgress check transam.c's single-item XID status cache 
before it goes groveling through the ProcArray.  In situations where the same
recently-committed transaction ID is checked repeatedly by tqual.c, this saves
a lot of shared-memory searches.  And it's cheap enough that it shouldn't
hurt noticeably when it doesn't help.
Concept and patch by Simon, some minor tweaking and comment-cleanup by Tom.
2008-03-11 20:20:35 +00:00
..
attnum.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
clog.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
genam.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
gin.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
gist.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
gist_private.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
gistscan.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
hash.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
heapam.h Refactor heap_page_prune so that instead of changing item states on-the-fly, 2008-03-08 21:57:59 +00:00
hio.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
htup.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
itup.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
multixact.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
nbtree.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
printtup.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
reloptions.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
relscan.h Fix CREATE INDEX CONCURRENTLY so that it won't use synchronized scan for 2008-01-14 01:39:09 +00:00
rewriteheap.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
rmgr.h Fix recently-understood problems with handling of XID freezing, particularly 2006-11-05 22:42:10 +00:00
sdir.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
skey.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
slru.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
subtrans.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
transam.h Make TransactionIdIsInProgress check transam.c's single-item XID status cache 2008-03-11 20:20:35 +00:00
tupdesc.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
tupmacs.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
tuptoaster.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
twophase.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
twophase_rmgr.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
valid.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
xact.h Fix PREPARE TRANSACTION to reject the case where the transaction has dropped a 2008-03-04 19:54:06 +00:00
xlog.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
xlog_internal.h Replace time_t with pg_time_t (same values, but always int64) in on-disk 2008-02-17 02:09:32 +00:00
xlogdefs.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00
xlogutils.h Update copyrights in source tree to 2008. 2008-01-01 19:46:01 +00:00