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Create a GUC parameter temp_tablespaces that allows selection of the

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tablespace(s) in which to store temp tables and temporary files.  This is a
list to allow spreading the load across multiple tablespaces (a random list
element is chosen each time a temp object is to be created).  Temp files are
not stored in per-database pgsql_tmp/ directories anymore, but per-tablespace
directories.

Jaime Casanova and Albert Cervera, with review by Bernd Helmle and Tom Lane.
This commit is contained in:
Tom Lane
2007-06-03 17:08:34 +00:00
parent 5d429f8d88
commit acfce502ba
26 changed files with 505 additions and 184 deletions
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18
src/backend/storage/file/buffile.c
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/file/buffile.c,v 1.26 2007/06/01 23:43:11 tgl Exp $
* $PostgreSQL: pgsql/src/backend/storage/file/buffile.c,v 1.27 2007/06/03 17:07:30 tgl Exp $
*
* NOTES:
*
@@ -60,6 +60,7 @@ struct BufFile
* offsets[i] is the current seek position of files[i]. We use this to
* avoid making redundant FileSeek calls.
*/
Oid tblspcOid; /* tablespace to use (InvalidOid = default) */
bool isTemp; /* can only add files if this is TRUE */
bool isInterXact; /* keep open over transactions? */
@@ -85,7 +86,7 @@ static int BufFileFlush(BufFile *file);
/*
* Create a BufFile given the first underlying physical file.
* NOTE: caller must set isTemp true if appropriate.
* NOTE: caller must set tblspcOid, isTemp, isInterXact if appropriate.
*/
static BufFile *
makeBufFile(File firstfile)
@@ -97,7 +98,9 @@ makeBufFile(File firstfile)
file->files[0] = firstfile;
file->offsets = (long *) palloc(sizeof(long));
file->offsets[0] = 0L;
file->tblspcOid = InvalidOid;
file->isTemp = false;
file->isInterXact = false;
file->dirty = false;
file->curFile = 0;
file->curOffset = 0L;
@@ -116,7 +119,7 @@ extendBufFile(BufFile *file)
File pfile;
Assert(file->isTemp);
pfile = OpenTemporaryFile(file->isInterXact);
pfile = OpenTemporaryFile(file->isInterXact, file->tblspcOid);
Assert(pfile >= 0);
file->files = (File *) repalloc(file->files,
@@ -133,19 +136,24 @@ extendBufFile(BufFile *file)
* multiple temporary files if more than MAX_PHYSICAL_FILESIZE bytes are
* written to it).
*
* If interXact is true, the temp file will not be automatically deleted
* at end of transaction. If tblspcOid is not InvalidOid, the temp file
* is created in the specified tablespace instead of the default one.
*
* Note: if interXact is true, the caller had better be calling us in a
* memory context that will survive across transaction boundaries.
*/
BufFile *
BufFileCreateTemp(bool interXact)
BufFileCreateTemp(bool interXact, Oid tblspcOid)
{
BufFile *file;
File pfile;
pfile = OpenTemporaryFile(interXact);
pfile = OpenTemporaryFile(interXact, tblspcOid);
Assert(pfile >= 0);
file = makeBufFile(pfile);
file->tblspcOid = tblspcOid;
file->isTemp = true;
file->isInterXact = interXact;