Contents
What are huge pages used for?
Using very large page sizes can improve system performance by reducing the amount of system resources required to access page table entries. HugePages is useful for both 32-bit and 64-bit configurations. HugePage sizes vary from 2 MB to 256 MB, depending on the kernel version and the hardware architecture.
What is large page memory?
Large memory pages are pages of memory which are significantly larger than 4 kb, usually 2 Mb. In some instances it’s configurable, from 2MB to 256MB. For the systems used in the tests for this book, the page size is 2MB. With 2MB pages, the number of pages for a 20GB heap memory drops from 5,242,880 to 10,240!
What are some advantages and disadvantages of using a larger page size?
A larger page size helps SQL Anywhere read databases more efficiently. Large page sizes tend to benefit large databases, and queries that perform sequential table scans. Often, the physical design of disks permits them to retrieve fewer large blocks more efficiently than many small ones.
What is large page support?
Large-page support enables server applications to establish large-page memory regions, which is particularly useful on 64-bit Windows. Each large-page translation uses a single translation buffer inside the CPU.
Is it better to use hugepages or not?
On the other hand, if you need to access a large portion of memory sequentially, hugepages may increase your performance. Still, you need to benchmark this using your program (not some abstract benchmark software!) and see whether it is faster with or without hugepages enabled.
How to measure performance impact of transparent hugepages?
TL;DR This post explains Transparent Hugepages (THP) in a nutshell, describes techniques that can be used to measure the performance impact, shows the effect on a real-world application. The post was inspired by a thread about Transparent Hugepages on the Mechanical Sympathy group.
How does large page size affect memory performance?
For Oracle Database, enabling HugePages and using the large page size reduces the operating system maintenance of page states and increases the TLB cache hit ratio by managing more memory with a single page table entry for a large page, rather than with many entries for a smaller page.
How to analyze and improve page load performance?
To get a clear understanding of how your website is performing, you will need to gather data on each of these factors and its impact on performance as a whole. SolarWinds ® Pingdom ® service provides a suite of tools for measuring web page performance.