What is Use large pages: -XX:+UseLargePages?

Usage:

You can set the flag to use large pages like this:

-XX:+UseLargePages

Description:

Large pages is a technique to remove some work from the processors TLB caches. They are used to speed up the time to translate virtual to physical memory addresses. Most architectures support multiple page sizes, often with a base page size of 4 KB. For heavy-memory consuming applications it makes sense to have the memory mapped with a larger page granularity to increase the chance of a hit in the TLB. On x86-64, 2 MB and 1 GB pages can be used for this purpose and for memory intense workloads this can have a really big impact.

Default Value:

JVM is system-dependent, by default, the JVM will use the environments default large page size when trying to reserve large pages.

Errors:

None

Arguments related:

TODO link LargePageSizeInBytes

Related Posts:

• Large pages and Java

NOTE:

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