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Fix the number of lwlocks needed by the "fast path" lock patch. It needs

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one lock per backend or auxiliary process - the need for a lock for each
aux processes was not accounted for in NumLWLocks(). No-one noticed,
because the three locks needed for the three aux processes fit into the
few extra lwlocks we allocate for 3rd party modules that don't call
RequestAddinLWLocks() (NUM_USER_DEFINED_LWLOCKS, 4 by default).
This commit is contained in:
Heikki Linnakangas 2011-10-27 22:39:58 +03:00
parent 051d1ba7a0
commit cbf65509bb
1 changed files with 2 additions and 2 deletions
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4
src/backend/storage/lmgr/lwlock.c
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@ -167,8 +167,8 @@ NumLWLocks(void)
/* bufmgr.c needs two for each shared buffer */
numLocks += 2 * NBuffers;
/* lock.c needs one per backend */
numLocks += MaxBackends;
/* proc.c needs one for each backend or auxiliary process */
numLocks += MaxBackends + NUM_AUXILIARY_PROCS;
/* clog.c needs one per CLOG buffer */
numLocks += NUM_CLOG_BUFFERS;