database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-11-06 07:49:08 +03:00
Code Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

21
src/backend/storage/lmgr/lock.c
View File

@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/lock.c,v 1.93 2001/08/29 19:14:39 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/lmgr/lock.c,v 1.94 2001/09/07 00:27:29 tgl Exp $
*
* NOTES
* Outside modules can create a lock table and acquire/release
@@ -1430,7 +1430,6 @@ LockShmemSize(int maxBackends)
void
DumpLocks(void)
{
SHMEM_OFFSET location;
PROC *proc;
SHM_QUEUE *procHolders;
HOLDER *holder;
@@ -1438,12 +1437,10 @@ DumpLocks(void)
int lockmethod = DEFAULT_LOCKMETHOD;
LOCKMETHODTABLE *lockMethodTable;
ShmemPIDLookup(MyProcPid, &location);
if (location == INVALID_OFFSET)
return;
proc = (PROC *) MAKE_PTR(location);
if (proc != MyProc)
proc = MyProc;
if (proc == NULL)
return;
procHolders = &proc->procHolders;
Assert(lockmethod < NumLockMethods);
@@ -1477,22 +1474,16 @@ DumpLocks(void)
void
DumpAllLocks(void)
{
SHMEM_OFFSET location;
PROC *proc;
HOLDER *holder = NULL;
LOCK *lock;
int pid;
int lockmethod = DEFAULT_LOCKMETHOD;
LOCKMETHODTABLE *lockMethodTable;
HTAB *holderTable;
HASH_SEQ_STATUS status;
pid = getpid();
ShmemPIDLookup(pid, &location);
if (location == INVALID_OFFSET)
return;
proc = (PROC *) MAKE_PTR(location);
if (proc != MyProc)
proc = MyProc;
if (proc == NULL)
return;
Assert(lockmethod < NumLockMethods);