Further reduce the number of semaphores used under --disable-spinlocks.
Per discussion, there doesn't seem to be much value in having
NUM_SPINLOCK_SEMAPHORES set to 1024: under any scenario where you are
running more than a few backends concurrently, you really had better have a
real spinlock implementation if you want tolerable performance. And 1024
semaphores is a sizable fraction of the system-wide SysV semaphore limit
on many platforms. Therefore, reduce this setting's default value to 128
to make it less likely to cause out-of-semaphores problems.
Branch
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REL9_2_STABLE
Details
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http://git.postgresql.org/pg/commitdiff/b24f7e2800be7a5d9c29677b8ef35f61c925d0d4
Modified Files
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src/include/pg_config_manual.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)