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author	Tom Lane <tgl@sss.pgh.pa.us>
	Mon, 23 Aug 2004 23:22:45 +0000 (23:22 +0000)
committer	Tom Lane <tgl@sss.pgh.pa.us>
	Mon, 23 Aug 2004 23:22:45 +0000 (23:22 +0000)
commit	4dbb880d3c77a580ef9634b93af26eaf64484ddb
tree	9caf91a5e2b4746f56eaa769033ecaeef06ca4d6	tree
parent	059912ce2e1952a591d2d61d666b07aed5fa8ad6	commit \| diff

Rearrange pg_subtrans handling as per recent discussion.  pg_subtrans
updates are no longer WAL-logged nor even fsync'd; we do not need to,
since after a crash no old pg_subtrans data is needed again.  We truncate
pg_subtrans to RecentGlobalXmin at each checkpoint.  slru.c's API is
refactored a little bit to separate out the necessary decisions.

13 files changed:

Robert Haas's development tree.

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src/backend/access/transam/clog.c		diff \| blob \| blame \| history
src/backend/access/transam/rmgr.c		diff \| blob \| blame \| history
src/backend/access/transam/slru.c		diff \| blob \| blame \| history
src/backend/access/transam/subtrans.c		diff \| blob \| blame \| history
src/backend/access/transam/xlog.c		diff \| blob \| blame \| history
src/backend/commands/vacuum.c		diff \| blob \| blame \| history
src/backend/storage/ipc/sinval.c		diff \| blob \| blame \| history
src/backend/storage/lmgr/lwlock.c		diff \| blob \| blame \| history
src/include/access/clog.h		diff \| blob \| blame \| history
src/include/access/rmgr.h		diff \| blob \| blame \| history
src/include/access/slru.h		diff \| blob \| blame \| history
src/include/access/subtrans.h		diff \| blob \| blame \| history
src/include/storage/lwlock.h		diff \| blob \| blame \| history