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Remove freeBackends counter from the sinval shared memory area. We used to

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use it to help enforce superuser_reserved_backends, but since 8.1 it's
just been dead weight.
This commit is contained in:
Tom Lane 2008-06-17 20:07:08 +00:00
parent b163baa89c
commit 86fdb32bd0
1 changed files with 1 additions and 9 deletions
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10
src/backend/storage/ipc/sinvaladt.c
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@ -8,7 +8,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/ipc/sinvaladt.c,v 1.69 2008/03/18 12:36:43 alvherre Exp $ * $PostgreSQL: pgsql/src/backend/storage/ipc/sinvaladt.c,v 1.70 2008/06/17 20:07:08 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -82,7 +82,6 @@ typedef struct SISeg
int maxMsgNum; /* next message number to be assigned */ int maxMsgNum; /* next message number to be assigned */
int lastBackend; /* index of last active procState entry, +1 */ int lastBackend; /* index of last active procState entry, +1 */
int maxBackends; /* size of procState array */ int maxBackends; /* size of procState array */
int freeBackends; /* number of empty procState slots */
/* /*
* Next LocalTransactionId to use for each idle backend slot. We keep * Next LocalTransactionId to use for each idle backend slot. We keep
@ -157,7 +156,6 @@ CreateSharedInvalidationState(void)
shmInvalBuffer->maxMsgNum = 0; shmInvalBuffer->maxMsgNum = 0;
shmInvalBuffer->lastBackend = 0; shmInvalBuffer->lastBackend = 0;
shmInvalBuffer->maxBackends = MaxBackends; shmInvalBuffer->maxBackends = MaxBackends;
shmInvalBuffer->freeBackends = MaxBackends;
/* The buffer[] array is initially all unused, so we need not fill it */ /* The buffer[] array is initially all unused, so we need not fill it */
@ -223,9 +221,6 @@ SharedInvalBackendInit(void)
/* Advertise assigned backend ID in MyProc */ /* Advertise assigned backend ID in MyProc */
MyProc->backendId = MyBackendId; MyProc->backendId = MyBackendId;
/* Reduce free slot count */
segP->freeBackends--;
/* Fetch next local transaction ID into local memory */ /* Fetch next local transaction ID into local memory */
nextLocalTransactionId = segP->nextLXID[MyBackendId - 1]; nextLocalTransactionId = segP->nextLXID[MyBackendId - 1];
@ -273,9 +268,6 @@ CleanupInvalidationState(int status, Datum arg)
} }
segP->lastBackend = i; segP->lastBackend = i;
/* Adjust free slot count */
segP->freeBackends++;
LWLockRelease(SInvalLock); LWLockRelease(SInvalLock);
} }