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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-08-01 22:45:09 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-08-01 22:45:09 +0000 |
| commit | 4a78cdeb6b598940e9d9adb92deca6494628802a (patch) | |
| tree | 0c8ad45eea297dcbc647705265eab8188fd4d8b1 /src/backend/access/transam/subtrans.c | |
| parent | c722628a430f347ff4a30419004cddc9795a3bb6 (diff) | |
| download | postgresql-4a78cdeb6b598940e9d9adb92deca6494628802a.tar.gz postgresql-4a78cdeb6b598940e9d9adb92deca6494628802a.zip | |
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.
Diffstat (limited to 'src/backend/access/transam/subtrans.c')
| -rw-r--r-- | src/backend/access/transam/subtrans.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/backend/access/transam/subtrans.c b/src/backend/access/transam/subtrans.c index 6205d43820d..b3836c5231c 100644 --- a/src/backend/access/transam/subtrans.c +++ b/src/backend/access/transam/subtrans.c @@ -22,7 +22,7 @@ * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/backend/access/transam/subtrans.c,v 1.18 2007/01/05 22:19:23 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/access/transam/subtrans.c,v 1.19 2007/08/01 22:45:07 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -78,7 +78,7 @@ SubTransSetParent(TransactionId xid, TransactionId parent) LWLockAcquire(SubtransControlLock, LW_EXCLUSIVE); - slotno = SimpleLruReadPage(SubTransCtl, pageno, xid); + slotno = SimpleLruReadPage(SubTransCtl, pageno, true, xid); ptr = (TransactionId *) SubTransCtl->shared->page_buffer[slotno]; ptr += entryno; @@ -165,14 +165,14 @@ SubTransGetTopmostTransaction(TransactionId xid) Size SUBTRANSShmemSize(void) { - return SimpleLruShmemSize(NUM_SUBTRANS_BUFFERS); + return SimpleLruShmemSize(NUM_SUBTRANS_BUFFERS, 0); } void SUBTRANSShmemInit(void) { SubTransCtl->PagePrecedes = SubTransPagePrecedes; - SimpleLruInit(SubTransCtl, "SUBTRANS Ctl", NUM_SUBTRANS_BUFFERS, + SimpleLruInit(SubTransCtl, "SUBTRANS Ctl", NUM_SUBTRANS_BUFFERS, 0, SubtransControlLock, "pg_subtrans"); /* Override default assumption that writes should be fsync'd */ SubTransCtl->do_fsync = false; |