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Change the autovacuum launcher to read pg_database directly, rather than

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via the "flat files" facility.  This requires making it enough like a backend
to be able to run transactions; it's no longer an "auxiliary process" but
more like the autovacuum worker processes.  Also, its signal handling has
to be brought into line with backends/workers.  In particular, since it
now has to handle procsignal.c processing, the special autovac-launcher-only
signal conditions are moved to SIGUSR2.

Alvaro, with some cleanup from Tom
This commit is contained in:
Tom Lane
2009-08-31 19:41:00 +00:00
parent 25ec228ef7
commit 00e6a16d01
8 changed files with 140 additions and 141 deletions
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6
src/backend/utils/init/globals.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/init/globals.c,v 1.109 2009/08/28 18:23:53 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/init/globals.c,v 1.110 2009/08/31 19:41:00 tgl Exp $
*
* NOTES
* Globals used all over the place should be declared here and not
@@ -100,8 +100,8 @@ int maintenance_work_mem = 16384;
/*
* Primary determinants of sizes of shared-memory structures. MaxBackends is
* MaxConnections + autovacuum_max_workers (it is computed by the GUC assign
* hook):
* MaxConnections + autovacuum_max_workers + 1 (it is computed by the GUC
* assign hooks for those variables):
*/
int NBuffers = 1000;
int MaxBackends = 100;