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Concurrency for GiST

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- full concurrency for insert/update/select/vacuum:
        - select and vacuum never locks more than one page simultaneously
        - select (gettuple) hasn't any lock across it's calls
        - insert never locks more than two page simultaneously:
                - during search of leaf to insert it locks only one page
                  simultaneously
                - while walk upward to the root it locked only parent (may be
                  non-direct parent) and child. One of them X-lock, another may
                  be S- or X-lock
- 'vacuum full' locks index
- improve gistgetmulti
- simplify XLOG records

Fix bug in index_beginscan_internal: LockRelation may clean
  rd_aminfo structure, so move GET_REL_PROCEDURE after LockRelation
This commit is contained in:
Teodor Sigaev
2005-06-27 12:45:23 +00:00
parent c3be085ab7
commit e8cab5fe49
12 changed files with 994 additions and 598 deletions
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39
src/include/access/gist.h
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@ -9,7 +9,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/gist.h,v 1.47 2005/06/20 10:29:36 teodor Exp $
* $PostgreSQL: pgsql/src/include/access/gist.h,v 1.48 2005/06/27 12:45:22 teodor Exp $
*
*-------------------------------------------------------------------------
*/
@ -19,6 +19,8 @@
#include "storage/bufpage.h"
#include "storage/off.h"
#include "utils/rel.h"
#include "access/xlog.h"
#include "access/xlogdefs.h"
/*
* amproc indexes for GiST indexes.
@ -39,9 +41,22 @@
#define F_DELETED (1 << 1)
#define F_TUPLES_DELETED (1 << 2)
typedef XLogRecPtr GistNSN;
typedef struct GISTPageOpaqueData
{
uint32 flags;
uint8 flags;
/* number page to which current one is splitted in last split */
uint8 nsplited;
/* level of page, 0 - leaf */
uint16 level;
BlockNumber rightlink;
/* the only meaning - change this value if
page split. */
GistNSN nsn;
} GISTPageOpaqueData;
typedef GISTPageOpaqueData *GISTPageOpaque;
@ -90,18 +105,20 @@ typedef struct GISTENTRY
bool leafkey;
} GISTENTRY;
#define GistPageIsLeaf(page) (((GISTPageOpaque) PageGetSpecialPointer(page))->flags & F_LEAF)
#define GistPageGetOpaque(page) ( (GISTPageOpaque) PageGetSpecialPointer(page) )
#define GistPageIsLeaf(page) ( GistPageGetOpaque(page)->flags & F_LEAF)
#define GIST_LEAF(entry) (GistPageIsLeaf((entry)->page))
#define GistPageSetLeaf(page) (((GISTPageOpaque) PageGetSpecialPointer(page))->flags |= F_LEAF)
#define GistPageSetNonLeaf(page) (((GISTPageOpaque) PageGetSpecialPointer(page))->flags &= ~F_LEAF)
#define GistPageSetLeaf(page) ( GistPageGetOpaque(page)->flags |= F_LEAF)
#define GistPageSetNonLeaf(page) ( GistPageGetOpaque(page)->flags &= ~F_LEAF)
#define GistPageIsDeleted(page) (((GISTPageOpaque) PageGetSpecialPointer(page))->flags & F_DELETED)
#define GistPageSetDeleted(page) (((GISTPageOpaque) PageGetSpecialPointer(page))->flags |= F_DELETED)
#define GistPageSetNonDeleted(page) (((GISTPageOpaque) PageGetSpecialPointer(page))->flags &= ~F_DELETED)
#define GistPageIsDeleted(page) ( GistPageGetOpaque(page)->flags & F_DELETED)
#define GistPageSetDeleted(page) ( GistPageGetOpaque(page)->flags |= F_DELETED)
#define GistPageSetNonDeleted(page) ( GistPageGetOpaque(page)->flags &= ~F_DELETED)
#define GistTuplesDeleted(page) (((GISTPageOpaque) PageGetSpecialPointer(page))->flags & F_TUPLES_DELETED)
#define GistMarkTuplesDeleted(page) (((GISTPageOpaque) PageGetSpecialPointer(page))->flags |= F_TUPLES_DELETED)
#define GistClearTuplesDeleted(page) (((GISTPageOpaque) PageGetSpecialPointer(page))->flags &= ~F_TUPLES_DELETED)
#define GistTuplesDeleted(page) ( GistPageGetOpaque(page)->flags & F_TUPLES_DELETED)
#define GistMarkTuplesDeleted(page) ( GistPageGetOpaque(page)->flags |= F_TUPLES_DELETED)
#define GistClearTuplesDeleted(page) ( GistPageGetOpaque(page)->flags &= ~F_TUPLES_DELETED)
/*
* Vector of GISTENTRY structs; user-defined methods union and pick