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Introduce GUC shared_memory_size

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This runtime-computed GUC shows the size of the server's main shared
memory area, taking into account the amount of shared memory allocated
by extensions as this is calculated after processing
shared_preload_libraries.

Author: Nathan Bossart
Discussion: https://postgr.es/m/F2772387-CE0F-46BF-B5F1-CC55516EB885@amazon.com
This commit is contained in:
Michael Paquier
2021-09-08 12:02:30 +09:00
parent fd0625c7a9
commit bd1788051b
5 changed files with 56 additions and 0 deletions
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7
src/backend/postmaster/postmaster.c
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@@ -1026,6 +1026,13 @@ PostmasterMain(int argc, char *argv[])
*/
InitializeMaxBackends();
/*
* Now that loadable modules have had their chance to request additional
* shared memory, determine the value of any runtime-computed GUCs that
* depend on the amount of shared memory required.
*/
InitializeShmemGUCs();
/*
* Set up shared memory and semaphores.
*/