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Move MAX_BACKENDS to procnumber.h

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MAX_BACKENDS influences many things besides postmaster. I e.g. noticed that we
don't have static assertions ensuring BUF_REFCOUNT_MASK is big enough for
MAX_BACKENDS, adding them would require including postmaster.h in
buf_internals.h which doesn't seem right.

While at that, add MAX_BACKENDS_BITS, as that's useful in various places for
static assertions (to be added in subsequent commits).

Reviewed-by: Thomas Munro <thomas.munro@gmail.com>
Discussion: https://postgr.es/m/wptizm4qt6yikgm2pt52xzyv6ycmqiutloyvypvmagn7xvqkce@d4xuv3mylpg4
This commit is contained in:
Andres Freund
2025-02-24 05:39:17 -05:00
parent 0600d276d4
commit 6394a3a61c
6 changed files with 17 additions and 14 deletions
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src/backend/utils/misc/guc_tables.c
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@ -77,6 +77,7 @@
#include "storage/large_object.h"
#include "storage/pg_shmem.h"
#include "storage/predicate.h"
#include "storage/procnumber.h"
#include "storage/standby.h"
#include "tcop/backend_startup.h"
#include "tcop/tcopprot.h"