PostgreSQL version:

huge_pages

Enables/disables the use of huge memory pages. Valid values are try (the default), on, and off.

At present, this feature is supported only on Linux. The setting is ignored on other systems when set to try.

The use of huge pages results in smaller page tables and less CPU time spent on memory management, increasing performance. For more details, see linux-huge-pages.

With huge_pages set to try, the server will try to use huge pages, but fall back to using normal allocation if that fails. With on, failure to use huge pages will prevent the server from starting up. With off, huge pages will not be used.

Recommendations

However, for small systems (< 2GB of RAM) may be beneficial to set to “off”.

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OK