[Last Call] Learn about multicloud storage options and how to improve your company's cloud strategy. Register Now

x
?
Solved

Page file size for SAP.

Posted on 2002-07-24
5
Medium Priority
?
2,402 Views
Last Modified: 2013-12-08
Sorry don't know SAP version, it's the customers server. Windows 2000 with 4GB ram and 4.5GB page file.

SAP have recommended increasing to 16GB swap after their monthly performance monitoring.
Microsoft say you should have each page file on a seperate hard disk so this means buying 4 more disks plus an enclosure to put them in since windows max page file is 4GB.

Why does having this much swap improve SAP's speed when normally Windows won't use more swap than RAM plus 25%.

In the SAP environment is it still important to have the 4 swap files on seperate spindles or can they get the required performance by putting all 4 swap files on a single partitioned disk drive?
0
Comment
Question by:andyalder
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
5 Comments
 

Expert Comment

by:zbde00
ID: 7182968
to  andyalder
what is SAP?is Satellite Automation System?
thanks!
0
 

Expert Comment

by:DanC3
ID: 7225534
see www.sap.com for details about SAP.
0
 

Accepted Solution

by:
madappattu earned 400 total points
ID: 7261157
Normally like Windows handling pagefiles(Virtual mem), SAP handles its mem & swap by its own. becasue as you must be knowing it has lots of internal buffers.
 "Microsoft say you should have each page file on a seperate hard disk " for its own performance and safety reasons. It is not a must that you do the same for SAP also. But if they repetedly says (in next Early watch report also) to increase then you can buy one disk and allocate(internally).
0
 
LVL 56

Author Comment

by:andyalder
ID: 7261251
Thanks.

I also found a performance stress test report that said the page file was not often accessed so I'll put all 4 swap partitions on a single disk.
0
 

Expert Comment

by:drdrake
ID: 7414583
Well "normally" the page file in SAP should be 4xtimes the RAM on a central system (Database+Central instance) but the maximum of 10GB. If you have read peformance problems you could isolate the swap file on its own raid1 disk.
You should also try to applie note: 203924
0

Featured Post

[Webinar] Lessons on Recovering from Petya

Skyport is working hard to help customers recover from recent attacks, like the Petya worm. This work has brought to light some important lessons. New malware attacks like this can take down your entire environment. Learn from others mistakes on how to prevent Petya like worms.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Supply Chain Event Management Supply chain visibility is the ability of a company to track its products and business processes in supply chain towards building operational excellence. The goal of supply chain visibility is to improve and strength…
Get to know the ins and outs of building a web-based ERP system for your enterprise. Development timeline, technology, and costs outlined.
This course is ideal for IT System Administrators working with VMware vSphere and its associated products in their company infrastructure. This course teaches you how to install and maintain this virtualization technology to store data, prevent vuln…
In this video, Percona Solution Engineer Rick Golba discuss how (and why) you implement high availability in a database environment. To discuss how Percona Consulting can help with your design and architecture needs for your database and infrastr…
Suggested Courses

650 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question