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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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5
src/include/miscadmin.h
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@@ -13,7 +13,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.176 2005/06/28 05:09:04 tgl Exp $
* $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.177 2005/07/04 04:51:52 tgl Exp $
*
* NOTES
* some of the information in this file should be moved to other files.
@@ -238,6 +238,7 @@ extern void InitializeSessionUserIdStandalone(void);
extern void SetSessionAuthorization(Oid roleid, bool is_superuser);
extern void SetDataDir(const char *dir);
extern void ChangeToDataDir(void);
extern char *make_absolute_path(const char *path);
/* in utils/misc/superuser.c */
@@ -309,7 +310,7 @@ extern void SetReindexProcessing(Oid heapOid, Oid indexOid);
extern void ResetReindexProcessing(void);
extern bool ReindexIsProcessingHeap(Oid heapOid);
extern bool ReindexIsProcessingIndex(Oid indexOid);
extern void CreateDataDirLockFile(const char *datadir, bool amPostmaster);
extern void CreateDataDirLockFile(bool amPostmaster);
extern void CreateSocketLockFile(const char *socketfile, bool amPostmaster);
extern void TouchSocketLockFile(void);
extern void RecordSharedMemoryInLockFile(unsigned long id1,