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Rearrange backend startup sequence so that ShmemIndexLock can become

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an LWLock instead of a spinlock.  This hardly matters on Unix machines
but should improve startup performance on Windows (or any port using
EXEC_BACKEND).  Per previous discussion.
This commit is contained in:
Tom Lane
2006-01-04 21:06:32 +00:00
parent e0078ea22d
commit 349f40b2c2
15 changed files with 414 additions and 259 deletions
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16
src/backend/tcop/postgres.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.474 2005/12/31 16:50:44 momjian Exp $
* $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.475 2006/01/04 21:06:31 tgl Exp $
*
* NOTES
* this is the "main" module of the postgres backend and
@ -2860,7 +2860,6 @@ PostgresMain(int argc, char *argv[], const char *username)
PG_SETMASK(&BlockSig); /* block everything except SIGQUIT */
if (IsUnderPostmaster)
{
/* noninteractive case: nothing should be left after switches */
@ -2933,6 +2932,19 @@ PostgresMain(int argc, char *argv[], const char *username)
BuildFlatFiles(true);
}
/*
* Create a per-backend PGPROC struct in shared memory, except in
* the EXEC_BACKEND case where this was done in SubPostmasterMain.
* We must do this before we can use LWLocks (and in the EXEC_BACKEND
* case we already had to do some stuff with LWLocks).
*/
#ifdef EXEC_BACKEND
if (!IsUnderPostmaster)
InitProcess();
#else
InitProcess();
#endif
/*
* General initialization.
*