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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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19
src/backend/utils/init/postinit.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/init/postinit.c,v 1.159 2005/11/22 18:17:26 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/init/postinit.c,v 1.160 2006/01/04 21:06:32 tgl Exp $
*
*
*-------------------------------------------------------------------------
@ -311,6 +311,9 @@ BaseInit(void)
* can only be tested inside a transaction, so we want to do it during
* the startup transaction rather than doing a separate one in postgres.c.)
*
* As of PostgreSQL 8.2, we expect InitProcess() was already called, so we
* already have a PGPROC struct ... but it's not filled in yet.
*
* Note:
* Be very careful with the order of calls in the InitPostgres function.
* --------------------------------
@ -383,17 +386,17 @@ InitPostgres(const char *dbname, const char *username)
*/
/*
* Set up my per-backend PGPROC struct in shared memory. (We need to
* know MyDatabaseId before we can do this, since it's entered into the
* PGPROC struct.)
* Finish filling in the PGPROC struct, and add it to the ProcArray.
* (We need to know MyDatabaseId before we can do this, since it's entered
* into the PGPROC struct.)
*
* Once I have done this, I am visible to other backends!
*/
InitProcess();
InitProcessPhase2();
/*
* Initialize my entry in the shared-invalidation manager's array of
* per-backend data. (Formerly this came before InitProcess, but now it
* must happen after, because it uses MyProc.) Once I have done this, I
* am visible to other backends!
* per-backend data.
*
* Sets up MyBackendId, a unique backend identifier.
*/