diff options
| author | Tom Lane | 2016-04-18 17:33:07 +0000 |
|---|---|---|
| committer | Tom Lane | 2016-04-18 17:33:07 +0000 |
| commit | 6ec1ff852f0ab13973979df311b0ac2be9e207b1 (patch) | |
| tree | 6f63c7ca40b22f636645514a6ebe008c7eb00b0e | |
| parent | 35166fd7614ed4f03e31f7ce1227c70103de22c9 (diff) | |
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.
| -rw-r--r-- | src/include/pg_config_manual.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/include/pg_config_manual.h b/src/include/pg_config_manual.h index 74d7ba2010a..4aefaf7fec6 100644 --- a/src/include/pg_config_manual.h +++ b/src/include/pg_config_manual.h @@ -62,7 +62,7 @@ * may improve performance, but supplying a real spinlock implementation is * probably far better. */ -#define NUM_SPINLOCK_SEMAPHORES 1024 +#define NUM_SPINLOCK_SEMAPHORES 128 /* * Define this if you want to allow the lo_import and lo_export SQL |