From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | pgsql-committers(at)postgresql(dot)org |
Subject: | pgsql: Further reduce the number of semaphores used under --disable-spi |
Date: | 2016-04-18 17:33:23 |
Message-ID: | E1asD35-0004Kt-5L@gemulon.postgresql.org |
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Lists: | pgsql-committers |
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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master
Details
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http://git.postgresql.org/pg/commitdiff/75c24d0f7491f77dfbc0acdf6c18439f288353ef
Modified Files
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src/include/pg_config_manual.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
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