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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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src/include/storage/ipc.h
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@@ -79,5 +79,6 @@ extern PGDLLIMPORT shmem_startup_hook_type shmem_startup_hook;
extern Size CalculateShmemSize(int *num_semaphores);
extern void CreateSharedMemoryAndSemaphores(void);
extern void InitializeShmemGUCs(void);
#endif /* IPC_H */