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Restructure autovacuum in two processes: a dummy process, which runs

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continuously, and requests vacuum runs of "autovacuum workers" to postmaster.
The workers do the actual vacuum work.  This allows for future improvements,
like allowing multiple autovacuum jobs running in parallel.

For now, the code keeps the original behavior of having a single autovac
process at any time by sleeping until the previous worker has finished.
This commit is contained in:
Alvaro Herrera
2007-02-15 23:23:23 +00:00
parent eecbb33267
commit 1820650934
16 changed files with 807 additions and 250 deletions
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5
src/include/miscadmin.h
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@ -13,7 +13,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.191 2007/01/05 22:19:50 momjian Exp $
* $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.192 2007/02/15 23:23:23 alvherre Exp $
*
* NOTES
* some of the information in this file should be moved to other files.
@ -302,7 +302,8 @@ extern ProcessingMode Mode;
*****************************************************************************/
/* in utils/init/postinit.c */
extern bool InitPostgres(const char *dbname, const char *username);
extern bool InitPostgres(const char *in_dbname, Oid dboid, const char *username,
char **out_dbname);
extern void BaseInit(void);
/* in utils/init/miscinit.c */