Thomas Munro 84b1c63ad4 Preallocate some DSM space at startup. ... Create an optional region in the main shared memory segment that can be used to acquire and release "fast" DSM segments, and can benefit from huge pages allocated at cluster startup time, if configured. Fall back to the existing mechanisms when that space is full. The size is controlled by a new GUC min_dynamic_shared_memory, defaulting to 0. Main region DSM segments initially contain whatever garbage the memory held last time they were used, rather than zeroes. That change revealed that DSA areas failed to initialize themselves correctly in memory that wasn't zeroed first, so fix that problem. Discussion: https://postgr.es/m/CA%2BhUKGLAE2QBv-WgGp%2BD9P_J-%3Dyne3zof9nfMaqq1h3EGHFXYQ%40mail.gmail.com		2020-07-31 17:49:58 +12:00
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sgml	Preallocate some DSM space at startup.	2020-07-31 17:49:58 +12:00
Makefile	Remove maintainer-check target, fold into normal build	2013-10-10 20:11:56 -04:00