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Remove dynamic_shared_memory_type=none

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PostgreSQL nowadays offers some kind of dynamic shared memory feature on
all supported platforms.  Having the choice of "none" prevents us from
relying on DSM in core features.  So this patch removes the choice of
"none".

Author: Kyotaro Horiguchi <horiguchi.kyotaro@lab.ntt.co.jp>
This commit is contained in:
Peter Eisentraut
2018-07-10 17:37:42 +02:00
parent 17b715c634
commit bcbd940806
9 changed files with 17 additions and 48 deletions
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7
src/backend/access/transam/parallel.c
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@ -161,13 +161,6 @@ CreateParallelContext(const char *library_name, const char *function_name,
/* Number of workers should be non-negative. */
Assert(nworkers >= 0);
/*
* If dynamic shared memory is not available, we won't be able to use
* background workers.
*/
if (dynamic_shared_memory_type == DSM_IMPL_NONE)
nworkers = 0;
/*
* If we are running under serializable isolation, we can't use parallel
* workers, at least not until somebody enhances that mechanism to be