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Commitcbf6550

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Fix the number of lwlocks needed by the "fast path" lock patch. It needs
one lock per backend or auxiliary process - the need for a lock for eachaux processes was not accounted for in NumLWLocks(). No-one noticed,because the three locks needed for the three aux processes fit into thefew extra lwlocks we allocate for 3rd party modules that don't callRequestAddinLWLocks() (NUM_USER_DEFINED_LWLOCKS, 4 by default).
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‎src/backend/storage/lmgr/lwlock.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -167,8 +167,8 @@ NumLWLocks(void)
167167
/* bufmgr.c needs two for each shared buffer */
168168
numLocks+=2*NBuffers;
169169

170-
/*lock.c needs oneperbackend */
171-
numLocks+=MaxBackends;
170+
/*proc.c needs onefor eachbackend or auxiliary process */
171+
numLocks+=MaxBackends+NUM_AUXILIARY_PROCS;
172172

173173
/* clog.c needs one per CLOG buffer */
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numLocks+=NUM_CLOG_BUFFERS;

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