database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-07-02 09:02:37 +03:00
Code Activity

Concurrency for GiST

Browse Source 
- 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
Download Patch File Download Diff File Expand all files Collapse all files

5
src/include/access/gistscan.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/gistscan.h,v 1.26 2004/12/31 22:03:21 pgsql Exp $
* $PostgreSQL: pgsql/src/include/access/gistscan.h,v 1.27 2005/06/27 12:45:22 teodor Exp $
*
*-------------------------------------------------------------------------
*/
@ -15,13 +15,14 @@
#define GISTSCAN_H
#include "access/relscan.h"
#include "access/xlogdefs.h"
extern Datum gistbeginscan(PG_FUNCTION_ARGS);
extern Datum gistrescan(PG_FUNCTION_ARGS);
extern Datum gistmarkpos(PG_FUNCTION_ARGS);
extern Datum gistrestrpos(PG_FUNCTION_ARGS);
extern Datum gistendscan(PG_FUNCTION_ARGS);
extern void gistadjscans(Relation r, int op, BlockNumber blkno, OffsetNumber offnum);
extern void gistadjscans(Relation r, int op, BlockNumber blkno, OffsetNumber offnum, XLogRecPtr newlsn, XLogRecPtr oldlsn);
extern void ReleaseResources_gist(void);
#endif /* GISTSCAN_H */