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Restructure smgr API as per recent proposal. smgr no longer depends on

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the relcache, and so the notion of 'blind write' is gone.  This should
improve efficiency in bgwriter and background checkpoint processes.
Internal restructuring in md.c to remove the not-very-useful array of
MdfdVec objects --- might as well just use pointers.
Also remove the long-dead 'persistent main memory' storage manager (mm.c),
since it seems quite unlikely to ever get resurrected.
This commit is contained in:
Tom Lane
2004-02-10 01:55:27 +00:00
parent f06e79525a
commit 87bd956385
37 changed files with 933 additions and 1776 deletions
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11
src/backend/commands/vacuumlazy.c
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@@ -31,7 +31,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/vacuumlazy.c,v 1.35 2004/02/06 19:36:17 wieck Exp $
* $PostgreSQL: pgsql/src/backend/commands/vacuumlazy.c,v 1.36 2004/02/10 01:55:25 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -148,9 +148,8 @@ lazy_vacuum_rel(Relation onerel, VacuumStmt *vacstmt)
vac_open_indexes(onerel, &nindexes, &Irel);
hasindex = (nindexes > 0);
/* Turn on vacuum cost accounting */
if (VacuumCostNaptime > 0)
VacuumCostActive = true;
/* Turn vacuum cost accounting on or off */
VacuumCostActive = (VacuumCostNaptime > 0);
VacuumCostBalance = 0;
/* Do the vacuuming */
@@ -784,7 +783,9 @@ lazy_truncate_heap(Relation onerel, LVRelStats *vacrelstats)
/*
* Do the physical truncation.
*/
new_rel_pages = smgrtruncate(DEFAULT_SMGR, onerel, new_rel_pages);
if (onerel->rd_smgr == NULL)
onerel->rd_smgr = smgropen(onerel->rd_node);
new_rel_pages = smgrtruncate(onerel->rd_smgr, new_rel_pages);
onerel->rd_nblocks = new_rel_pages; /* update relcache immediately */
onerel->rd_targblock = InvalidBlockNumber;
vacrelstats->rel_pages = new_rel_pages; /* save new number of