If you would take a look into any system Windows 7 x64 here with abou 32GB Ram and open some apps. To continue this discussion, please ask a new question. Which of the following retains the information it's storing when the system power is turned off? Submit ». Get answers from your peers along with millions of IT pros who visit Spiceworks.
I have a 2gb page file. I dont have another drive to put the page file on. Best Answer. Duffney Dec 3, at UTC.
View this "Best Answer" in the replies below ». Towards the middle of the page it explains where to change this setting. Hope it helps. You could fill up an entire SAN in a single weekend. A page file 1. This is not the case any more. I leave the page file at Windows default size and settings on all production servers except for an SSAS server that is experiencing memory pressure.
After more than 11 years, I have only had to increae the paging file to capture a full dump one time. Irrelevant of the size of the RAM, you still need a pagefile at least 1.
When memory is committed, physical pages of memory are allocated and space is reserved in a pagefile. And given the fact that SQL uses a Dynamic Memory Management policy that reserves upfront as much buffer pool as possible reserves and commits in terms of VAS , SQL Server will request at start up a huge reservation of space in the pagefile.
This always causes some confusion, as administrators erroneously assume that a large RAM eliminates the need for a pagefile. In truth the contrary happens, a large RAM increases the need for pagefile, just because of the inner workings of the Windows NT memory manager.
The reserved pagefile is, hopefully, never used. According to Microsoft, "as the amount of RAM in a computer increases, the need for a page file decreases. Try setting your page file to 1. How to determine the appropriate page file size for bit versions of Windows.
The bigger the better up to the size of the working set of the application where you will start to get into diminishing returns. You can try to find this by slowly increasing or decreasing the size until you see a significant change in cache hit rates. Generally you should keep an eye on this on a production system to make sure it hasn't outgrown its RAM allocation.
We were recently having some performance issues with one of our SQL Server that we weren't able to completely narrow down, and actually used one of our Microsoft support tickets to have them help troubleshoot. If you're looking for high performance, you are going to want to avoid paging completely, so the page file size becomes less significant. Simply, the page file is a cache for files that gets managed by the OS, and SQL has it's own internal memory management system.
The MS article referenced does not qualify that the advice is for the OS running out-of-the-box services such as file sharing. In this case, the normal recommendation of 1. This very general recommendation is provided under the assumption that all memory is being used by "normal" processes, which can generally have their least-used pages moved to disk without generating massive performance issues for the application process the memory belongs to.
For servers running SQL Server generally with very large amounts of RAM , the majority of the physical RAM is committed to the SQL Server process and should be if configured correctly locked in physical memory, preventing it from being paged out to the pagefile.
Since SQL Server already manages its own memory space, this memory space should not be considered "pageable", and not included in a calculation for pagefile size. It does not allocate a matching page in the pagefile at that time. Near the end of this article , Mark Russinovich briefly discusses system-managed pagefile sizes:. The rest of the article is well worth reading, and does talk a bit more about what happens when Windows grows the pagefile. In my own experience, system-managed pagefile is the best option to take in the vast majority of cases.
The general rule for system managed pagefile is: the operating system will create a page file that is one and a half times the amount of RAM that is installed in your computer. However you rarely need the size of the pagefile be determined by system because nowadays computers RAM is more than adequate. A system managed page file with its shrinking and growing is subject to heavy fragmentation. This KB article addresses the issue and explains how to calculate the page file size: How to determine the appropriate page file size for bit versions of Windows Server or Windows XP.
Setting to a fixed size pagefile is worth considering. Additionally, it prevents this problem: The page file size may become alternately too small or too large when you start Windows Server or Windows Vista if there is no available free disk space, and the page file size is managed by the system. It handles sorting out the size of the pagefile. In the past I've set that when the available drive space is substantial.
If you have the room why not let the system have as much as it needs? This video will answer your questions and also tell you more then you'd ever want to know about Windows memory management. It works on a dynamic basis. It sets a typical upper level for the amount of RAM you have installed, which it extends as needed.
Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. What exactly does "system managed size" mean for a Windows pagefile? Ask Question. Asked 12 years, 7 months ago. Active 1 month ago. Viewed 69k times. Improve this question.
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