54.26. pg_shmem_allocations #
The pg_shmem_allocations view shows allocations made from the server's main shared memory segment. This includes both memory allocated by PostgreSQL itself and memory allocated by extensions using the mechanisms detailed in Section 38.10.10.
Note that this view does not include memory allocated using the dynamic shared memory infrastructure.
Table 54.26. pg_shmem_allocations Columns
Column Type Description |
|---|
The name of the shared memory allocation. NULL for unused memory and |
The offset at which the allocation starts. NULL for anonymous allocations, since details related to them are not known. |
Size of the allocation in bytes |
Size of the allocation in bytes including padding. For anonymous allocations, no information about padding is available, so the |
Anonymous allocations are allocations that have been made with ShmemAlloc() directly, rather than via ShmemInitStruct() or ShmemInitHash().
By default, the pg_shmem_allocations view can be read only by superusers or roles with privileges of the pg_read_all_stats role.