dynamic_shared_memory_type
A server parameter determining the dynamic shared memory implementation to use
dynamic_shared_memory_type is a a configuration parameter determining which dynamic shared memory implementation to use.
dynamic_shared_memory_type was added in PostgreSQL 9.4.
Usage
Possible values are:
posixsysvwindowsmmap
Not all values are supported on all platforms.
Use of mmap is not recommended, as the operating system may repeatedly write modified pages back to disk, increasing system I/O load.
Default value
The default value for dynamic_shared_memory_type is the first of the above values supported on the local system.
For Linux et al this will be posix; for Windows, windows.
mmap is not the default for any platform.
Change history
- PostgreSQL 9.4
- added (commit 0ac5e5a7)
References
- PostgreSQL documentation: dynamic_shared_memory_type