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Arrange for the postmaster (and standalone backends, initdb, etc) to

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chdir into PGDATA and subsequently use relative paths instead of absolute
paths to access all files under PGDATA.  This seems to give a small
performance improvement, and it should make the system more robust
against naive DBAs doing things like moving a database directory that
has a live postmaster in it.  Per recent discussion.
This commit is contained in:
Tom Lane
2005-07-04 04:51:52 +00:00
parent 7504f0bae8
commit eb5949d190
27 changed files with 364 additions and 474 deletions
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13
src/backend/utils/adt/misc.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/misc.c,v 1.44 2005/06/19 21:34:02 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/misc.c,v 1.45 2005/07/04 04:51:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -145,10 +145,10 @@ pg_tablespace_databases(PG_FUNCTION_ARGS)
fctx = palloc(sizeof(ts_db_fctx));
/*
* size = path length + tablespace dirname length + 2 dir sep
* chars + oid + terminator
* size = tablespace dirname length + dir sep
* char + oid + terminator
*/
fctx->location = (char *) palloc(strlen(DataDir) + 11 + 10 + 1);
fctx->location = (char *) palloc(10 + 10 + 1);
if (tablespaceOid == GLOBALTABLESPACE_OID)
{
fctx->dirdesc = NULL;
@ -158,10 +158,9 @@ pg_tablespace_databases(PG_FUNCTION_ARGS)
else
{
if (tablespaceOid == DEFAULTTABLESPACE_OID)
sprintf(fctx->location, "%s/base", DataDir);
sprintf(fctx->location, "base");
else
sprintf(fctx->location, "%s/pg_tblspc/%u", DataDir,
tablespaceOid);
sprintf(fctx->location, "pg_tblspc/%u", tablespaceOid);
fctx->dirdesc = AllocateDir(fctx->location);