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Get rid of PID entries in shmem hash table; there is no longer any need

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for them, and making them just wastes time during backend startup/shutdown.
Also, remove compile-time MAXBACKENDS limit per long-ago proposal.
You can now set MaxBackends as high as your kernel can stand without
any reconfiguration/recompilation.
This commit is contained in:
Tom Lane
2001-09-07 00:27:30 +00:00
parent 0059c4216c
commit 863aceb54f
12 changed files with 213 additions and 316 deletions
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12
src/backend/postmaster/postmaster.c
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@@ -37,7 +37,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.237 2001/08/30 19:02:42 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/postmaster/postmaster.c,v 1.238 2001/09/07 00:27:29 tgl Exp $
*
* NOTES
*
@@ -138,9 +138,9 @@ char *UnixSocketDir;
char *VirtualHost;
/*
* MaxBackends is the actual limit on the number of backends we will
* start. The default is established by configure, but it can be
* readjusted from 1..MAXBACKENDS with the postmaster -N switch. Note
* MaxBackends is the limit on the number of backends we can start.
* The default is established by configure, but it can be altered at
* postmaster start with the postmaster's -N switch. Note
* that a larger MaxBackends value will increase the size of the shared
* memory area as well as cause the postmaster to grab more kernel
* semaphores, even if you never actually use that many backends.
@@ -777,8 +777,8 @@ usage(const char *progname)
#ifdef USE_SSL
printf(gettext(" -l enable SSL connections\n"));
#endif
printf(gettext(" -N MAX-CONNECT maximum number of allowed connections (1..%d, default %d)\n"),
MAXBACKENDS, DEF_MAXBACKENDS);
printf(gettext(" -N MAX-CONNECT maximum number of allowed connections (default %d)\n"),
DEF_MAXBACKENDS);
printf(gettext(" -o OPTIONS pass 'OPTIONS' to each backend server\n"));
printf(gettext(" -p PORT port number to listen on (default %d)\n"), DEF_PGPORT);
printf(gettext(" -S silent mode (start in background without logging output)\n"));