Bug 44127

Informational

GemStone/S 64 Bit

3.4.3, 3.4.2, 3.4.1, 3.4, 3.3.9, 3.3.8, 3.3.7, 3.3.6, 3.3.5, 3.3.4, 3.3.3, 3.3.1, 3.3, 3.2.16, 3.2.15, 3.2.14, 3.2.13, 3.2.12, 3.2.11, 3.2.10, 3.2.9, 3.2.8.1, 3.2.8, 3.2.7, 3.2.6, 3.2.5, 3.2.4, 3.2.3, 3.2.2, 3.2.1, 3.2, 3.1.0.6, 3.1.0.5, 3.1.0.4, 3.1.0.3, 3.1.0.2, 3.1.0.1, 3.1.X, 3.0.1, 3.0, 3.0.X, 2.4.8, 2.4.7, 2.4.6, 2.4.5.1, 2.4.5, 2.4.4.8, 2.4.4.7, 2.4.4.6, 2.4.4.5, 2.4.4.4, 2.4.X, 2.3.1.6, 2.3.X, 2.2.5.4, 2.2.X, 2.x

Linux

3.2, 2.4.7

Shared Cache size limited to 256GB on Linux

Linux, by default, limits a single shared memory segment to 256GB.  This effectively limits the size of the shared page cache.

Workaround

Linux uses a memory page size of 4KB by default, but can be configured to use 2MB large memory pages.  Large pages will allow a larger shared page cache.  In v3.2 and later you can configure large pages on Linux by configuring the OS and using the configuration parameter SHR_PAGE_CACHE_LARGE_MEMORY_PAGE_POLICY.  For details, see the Installation Guide for the specific version, such as Installation Guide for v3.4 for Linux.

Large pages can also be configured in v2.4.7, using a slightly different procedure. See the Installation Guide for v2.4.7 for Linux for details.


Last updated: 10/30/17