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Allow maximum number of backends to be set at configure time

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(--with-maxbackends).  Add a postmaster switch (-N backends) that allows
the limit to be reduced at postmaster start time.  (You can't increase it,
sorry to say, because there are still some fixed-size arrays.)
Grab the number of semaphores indicated by min(MAXBACKENDS, -N) at
postmaster startup, so that this particular form of bogus configuration
is exposed immediately rather than under heavy load.
This commit is contained in:
Tom Lane
1999-02-19 06:06:39 +00:00
parent 612b8434e4
commit e77b630cf0
14 changed files with 502 additions and 392 deletions
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4
src/backend/utils/init/postinit.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/init/postinit.c,v 1.37 1999/02/13 23:20:02 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/init/postinit.c,v 1.38 1999/02/19 06:06:10 tgl Exp $
*
* NOTES
* InitPostgres() is the function called from PostgresMain
@ -571,7 +571,7 @@ InitPostgres(char *name) /* database name */
*/
InitProcess(PostgresIpcKey);
if (MyBackendId > MaxBackendId || MyBackendId <= 0)
if (MyBackendId > MAXBACKENDS || MyBackendId <= 0)
{
elog(FATAL, "cinit2: bad backend id %d (%d)",
MyBackendTag,