Horton

Support an optional asynchronous commit mode, in which we don't flush WAL

Tom Lane <tgl@sss.pgh.pa.us>

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Commit: 4a78cdeb6b598940e9d9adb92deca6494628802a
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2007-08-01T22:45:09Z
Releases: 8.3.0 
Support an optional asynchronous commit mode, in which we don't flush WAL
before reporting a transaction committed.  Data consistency is still
guaranteed (unlike setting fsync = off), but a crash may lose the effects
of the last few transactions.  Patch by Simon, some editorialization by Tom.

Files

PathChange+/−
doc/src/sgml/config.sgml modified +40 −1
doc/src/sgml/wal.sgml modified +160 −27
src/backend/access/transam/clog.c modified +65 −13
src/backend/access/transam/multixact.c modified +12 −12
src/backend/access/transam/README modified +111 −2
src/backend/access/transam/slru.c modified +100 −12
src/backend/access/transam/subtrans.c modified +4 −4
src/backend/access/transam/transam.c modified +102 −20
src/backend/access/transam/twophase.c modified +6 −2
src/backend/access/transam/xact.c modified +73 −17
src/backend/access/transam/xlog.c modified +40 −8
src/backend/commands/dbcommands.c modified +11 −3
src/backend/commands/tablespace.c modified +17 −1
src/backend/commands/vacuum.c modified +20 −2
src/backend/utils/init/flatfiles.c modified +9 −1
src/backend/utils/misc/guc.c modified +11 −3
src/backend/utils/misc/postgresql.conf.sample modified +1 −0
src/backend/utils/time/tqual.c modified +175 −159
src/include/access/clog.h modified +3 −3
src/include/access/gist_private.h modified +1 −3
src/include/access/slru.h modified +19 −6
src/include/access/transam.h modified +6 −1
src/include/access/xact.h modified +5 −1
src/include/access/xlogdefs.h modified +3 −1
src/include/access/xlog.h modified +4 −1