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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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11
src/configure.in
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@@ -255,7 +255,16 @@ AC_ARG_WITH(
AC_DEFINE_UNQUOTED(DEF_PGPORT, "5432") AC_MSG_RESULT(5432)
)
dnl We exclude tcl support unless we override it with --with-tcl
dnl MAXBACKENDS can be set by --with-maxbackends. Default value is 64.
AC_MSG_CHECKING(setting MAXBACKENDS)
AC_ARG_WITH(
maxbackends,
[ --with-maxbackends=<n> set maximum number of server processes ],
AC_DEFINE_UNQUOTED(MAXBACKENDS, ${withval}) AC_MSG_RESULT($with_maxbackends),
AC_DEFINE_UNQUOTED(MAXBACKENDS, 64) AC_MSG_RESULT(64)
)
dnl We exclude tcl support unless user says --with-tcl
AC_MSG_CHECKING(setting USE_TCL)
AC_ARG_WITH(
tcl,